/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/eca-rers2012/Problem12_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 01:20:38,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 01:20:38,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 01:20:38,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 01:20:38,373 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 01:20:38,432 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 01:20:38,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 01:20:38,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 01:20:38,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 01:20:38,435 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 01:20:38,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 01:20:38,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 01:20:38,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 01:20:38,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 01:20:38,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 01:20:38,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 01:20:38,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 01:20:38,439 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 01:20:38,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 01:20:38,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 01:20:38,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 01:20:38,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 01:20:38,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 01:20:38,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 01:20:38,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 01:20:38,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 01:20:38,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 01:20:38,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 01:20:38,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 01:20:38,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 01:20:38,443 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 01:20:38,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 01:20:38,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 01:20:38,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 01:20:38,907 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 01:20:38,907 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 01:20:38,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label07.c [2020-12-22 01:20:39,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bd1049ee/5c2dcd2b66394f0dbbd02ac01081b9f0/FLAGc0a6638a8 [2020-12-22 01:20:40,206 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 01:20:40,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label07.c [2020-12-22 01:20:40,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bd1049ee/5c2dcd2b66394f0dbbd02ac01081b9f0/FLAGc0a6638a8 [2020-12-22 01:20:40,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bd1049ee/5c2dcd2b66394f0dbbd02ac01081b9f0 [2020-12-22 01:20:40,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 01:20:40,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 01:20:40,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 01:20:40,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 01:20:40,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 01:20:40,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:20:40" (1/1) ... [2020-12-22 01:20:40,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5821f10e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:40, skipping insertion in model container [2020-12-22 01:20:40,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:20:40" (1/1) ... [2020-12-22 01:20:40,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 01:20:40,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 01:20:41,026 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/eca-rers2012/Problem12_label07.c[1203,1216] [2020-12-22 01:20:42,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:20:42,218 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 01:20:42,241 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/eca-rers2012/Problem12_label07.c[1203,1216] [2020-12-22 01:20:42,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:20:42,944 INFO L208 MainTranslator]: Completed translation [2020-12-22 01:20:42,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:42 WrapperNode [2020-12-22 01:20:42,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 01:20:42,947 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 01:20:42,948 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 01:20:42,948 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 01:20:42,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:42" (1/1) ... [2020-12-22 01:20:43,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:42" (1/1) ... [2020-12-22 01:20:43,640 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 01:20:43,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 01:20:43,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 01:20:43,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 01:20:43,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:42" (1/1) ... [2020-12-22 01:20:43,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:42" (1/1) ... [2020-12-22 01:20:43,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:42" (1/1) ... [2020-12-22 01:20:43,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:42" (1/1) ... [2020-12-22 01:20:44,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:42" (1/1) ... [2020-12-22 01:20:44,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:42" (1/1) ... [2020-12-22 01:20:44,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:42" (1/1) ... [2020-12-22 01:20:44,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 01:20:44,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 01:20:44,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 01:20:44,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 01:20:44,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:42" (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 [2020-12-22 01:20:44,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 01:20:44,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 01:20:44,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 01:20:44,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 01:20:50,151 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 01:20:50,151 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 01:20:50,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:20:50 BoogieIcfgContainer [2020-12-22 01:20:50,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 01:20:50,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 01:20:50,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 01:20:50,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 01:20:50,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:20:40" (1/3) ... [2020-12-22 01:20:50,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6121f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:20:50, skipping insertion in model container [2020-12-22 01:20:50,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:42" (2/3) ... [2020-12-22 01:20:50,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6121f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:20:50, skipping insertion in model container [2020-12-22 01:20:50,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:20:50" (3/3) ... [2020-12-22 01:20:50,165 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label07.c [2020-12-22 01:20:50,173 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 01:20:50,179 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 01:20:50,202 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 01:20:50,239 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 01:20:50,240 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 01:20:50,240 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 01:20:50,240 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 01:20:50,240 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 01:20:50,240 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 01:20:50,240 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 01:20:50,240 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 01:20:50,275 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states. [2020-12-22 01:20:50,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 01:20:50,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:20:50,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 01:20:50,283 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:20:50,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:20:50,291 INFO L82 PathProgramCache]: Analyzing trace with hash 889694410, now seen corresponding path program 1 times [2020-12-22 01:20:50,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:20:50,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673361822] [2020-12-22 01:20:50,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:20:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:20:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:20:50,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673361822] [2020-12-22 01:20:50,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:20:50,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:20:50,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828187264] [2020-12-22 01:20:50,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:20:50,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:20:50,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:20:50,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:20:50,535 INFO L87 Difference]: Start difference. First operand 818 states. Second operand 3 states. [2020-12-22 01:20:57,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:20:57,261 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2020-12-22 01:20:57,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:20:57,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 01:20:57,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:20:57,297 INFO L225 Difference]: With dead ends: 2388 [2020-12-22 01:20:57,298 INFO L226 Difference]: Without dead ends: 1506 [2020-12-22 01:20:57,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:20:57,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2020-12-22 01:20:57,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2020-12-22 01:20:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1506 states. [2020-12-22 01:20:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2814 transitions. [2020-12-22 01:20:57,477 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2814 transitions. Word has length 6 [2020-12-22 01:20:57,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:20:57,478 INFO L481 AbstractCegarLoop]: Abstraction has 1506 states and 2814 transitions. [2020-12-22 01:20:57,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:20:57,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2814 transitions. [2020-12-22 01:20:57,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 01:20:57,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:20:57,481 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:20:57,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 01:20:57,483 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:20:57,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:20:57,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1985672844, now seen corresponding path program 1 times [2020-12-22 01:20:57,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:20:57,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292428342] [2020-12-22 01:20:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:20:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:20:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:20:57,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292428342] [2020-12-22 01:20:57,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:20:57,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:20:57,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050858922] [2020-12-22 01:20:57,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:20:57,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:20:57,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:20:57,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:20:57,871 INFO L87 Difference]: Start difference. First operand 1506 states and 2814 transitions. Second operand 4 states. [2020-12-22 01:21:07,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:21:07,842 INFO L93 Difference]: Finished difference Result 5271 states and 9820 transitions. [2020-12-22 01:21:07,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 01:21:07,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-12-22 01:21:07,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:21:07,867 INFO L225 Difference]: With dead ends: 5271 [2020-12-22 01:21:07,868 INFO L226 Difference]: Without dead ends: 3767 [2020-12-22 01:21:07,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:21:07,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2020-12-22 01:21:07,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3759. [2020-12-22 01:21:07,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3759 states. [2020-12-22 01:21:07,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 6058 transitions. [2020-12-22 01:21:07,990 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 6058 transitions. Word has length 79 [2020-12-22 01:21:07,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:21:07,992 INFO L481 AbstractCegarLoop]: Abstraction has 3759 states and 6058 transitions. [2020-12-22 01:21:07,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:21:07,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 6058 transitions. [2020-12-22 01:21:08,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 01:21:08,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:21:08,006 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:21:08,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 01:21:08,007 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:21:08,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:21:08,011 INFO L82 PathProgramCache]: Analyzing trace with hash -257547958, now seen corresponding path program 1 times [2020-12-22 01:21:08,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:21:08,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962652410] [2020-12-22 01:21:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:21:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:21:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:21:08,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962652410] [2020-12-22 01:21:08,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908543427] [2020-12-22 01:21:08,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:21:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:21:08,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 01:21:08,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:21:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 01:21:08,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:21:08,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2020-12-22 01:21:08,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803394061] [2020-12-22 01:21:08,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:21:08,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:21:08,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:21:08,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:21:08,788 INFO L87 Difference]: Start difference. First operand 3759 states and 6058 transitions. Second operand 3 states. [2020-12-22 01:21:15,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:21:15,552 INFO L93 Difference]: Finished difference Result 10520 states and 17412 transitions. [2020-12-22 01:21:15,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:21:15,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2020-12-22 01:21:15,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:21:15,594 INFO L225 Difference]: With dead ends: 10520 [2020-12-22 01:21:15,594 INFO L226 Difference]: Without dead ends: 6763 [2020-12-22 01:21:15,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:21:15,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2020-12-22 01:21:15,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2020-12-22 01:21:15,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6763 states. [2020-12-22 01:21:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 11030 transitions. [2020-12-22 01:21:15,763 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 11030 transitions. Word has length 147 [2020-12-22 01:21:15,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:21:15,764 INFO L481 AbstractCegarLoop]: Abstraction has 6763 states and 11030 transitions. [2020-12-22 01:21:15,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:21:15,764 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 11030 transitions. [2020-12-22 01:21:15,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-22 01:21:15,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:21:15,766 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:21:15,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 01:21:15,980 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:21:15,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:21:15,982 INFO L82 PathProgramCache]: Analyzing trace with hash -75370533, now seen corresponding path program 1 times [2020-12-22 01:21:15,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:21:15,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344649898] [2020-12-22 01:21:15,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:21:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:21:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:21:16,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344649898] [2020-12-22 01:21:16,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:21:16,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:21:16,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441871945] [2020-12-22 01:21:16,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:21:16,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:21:16,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:21:16,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:21:16,261 INFO L87 Difference]: Start difference. First operand 6763 states and 11030 transitions. Second operand 4 states. [2020-12-22 01:21:24,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:21:24,597 INFO L93 Difference]: Finished difference Result 18067 states and 29771 transitions. [2020-12-22 01:21:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:21:24,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2020-12-22 01:21:24,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:21:24,667 INFO L225 Difference]: With dead ends: 18067 [2020-12-22 01:21:24,667 INFO L226 Difference]: Without dead ends: 11269 [2020-12-22 01:21:24,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:21:24,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11269 states. [2020-12-22 01:21:24,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11269 to 9767. [2020-12-22 01:21:24,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9767 states. [2020-12-22 01:21:24,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 14064 transitions. [2020-12-22 01:21:24,923 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 14064 transitions. Word has length 154 [2020-12-22 01:21:24,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:21:24,925 INFO L481 AbstractCegarLoop]: Abstraction has 9767 states and 14064 transitions. [2020-12-22 01:21:24,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:21:24,925 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 14064 transitions. [2020-12-22 01:21:24,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-22 01:21:24,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:21:24,934 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:21:24,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 01:21:24,934 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:21:24,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:21:24,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1982992022, now seen corresponding path program 1 times [2020-12-22 01:21:24,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:21:24,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174035857] [2020-12-22 01:21:24,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:21:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:21:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-12-22 01:21:25,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174035857] [2020-12-22 01:21:25,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:21:25,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:21:25,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281330361] [2020-12-22 01:21:25,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:21:25,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:21:25,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:21:25,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:21:25,296 INFO L87 Difference]: Start difference. First operand 9767 states and 14064 transitions. Second operand 3 states. [2020-12-22 01:21:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:21:32,347 INFO L93 Difference]: Finished difference Result 25542 states and 38131 transitions. [2020-12-22 01:21:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:21:32,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 224 [2020-12-22 01:21:32,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:21:32,393 INFO L225 Difference]: With dead ends: 25542 [2020-12-22 01:21:32,394 INFO L226 Difference]: Without dead ends: 15777 [2020-12-22 01:21:32,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:21:32,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15777 states. [2020-12-22 01:21:32,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15777 to 14273. [2020-12-22 01:21:32,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14273 states. [2020-12-22 01:21:32,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 20354 transitions. [2020-12-22 01:21:32,766 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 20354 transitions. Word has length 224 [2020-12-22 01:21:32,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:21:32,766 INFO L481 AbstractCegarLoop]: Abstraction has 14273 states and 20354 transitions. [2020-12-22 01:21:32,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:21:32,767 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 20354 transitions. [2020-12-22 01:21:32,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-12-22 01:21:32,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:21:32,772 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:21:32,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 01:21:32,773 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:21:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:21:32,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1645467978, now seen corresponding path program 1 times [2020-12-22 01:21:32,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:21:32,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59733588] [2020-12-22 01:21:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:21:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:21:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-22 01:21:33,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59733588] [2020-12-22 01:21:33,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:21:33,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:21:33,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405341640] [2020-12-22 01:21:33,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:21:33,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:21:33,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:21:33,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:21:33,036 INFO L87 Difference]: Start difference. First operand 14273 states and 20354 transitions. Second operand 3 states. [2020-12-22 01:21:39,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:21:39,821 INFO L93 Difference]: Finished difference Result 36054 states and 51383 transitions. [2020-12-22 01:21:39,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:21:39,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 293 [2020-12-22 01:21:39,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:21:39,883 INFO L225 Difference]: With dead ends: 36054 [2020-12-22 01:21:39,884 INFO L226 Difference]: Without dead ends: 21783 [2020-12-22 01:21:39,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:21:39,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21783 states. [2020-12-22 01:21:40,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21783 to 16526. [2020-12-22 01:21:40,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16526 states. [2020-12-22 01:21:40,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16526 states to 16526 states and 20986 transitions. [2020-12-22 01:21:40,276 INFO L78 Accepts]: Start accepts. Automaton has 16526 states and 20986 transitions. Word has length 293 [2020-12-22 01:21:40,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:21:40,278 INFO L481 AbstractCegarLoop]: Abstraction has 16526 states and 20986 transitions. [2020-12-22 01:21:40,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:21:40,284 INFO L276 IsEmpty]: Start isEmpty. Operand 16526 states and 20986 transitions. [2020-12-22 01:21:40,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2020-12-22 01:21:40,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:21:40,294 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:21:40,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 01:21:40,294 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:21:40,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:21:40,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1824826449, now seen corresponding path program 1 times [2020-12-22 01:21:40,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:21:40,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274984791] [2020-12-22 01:21:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:21:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:21:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 370 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-22 01:21:40,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274984791] [2020-12-22 01:21:40,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:21:40,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:21:40,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77857754] [2020-12-22 01:21:40,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:21:40,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:21:40,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:21:40,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:21:40,966 INFO L87 Difference]: Start difference. First operand 16526 states and 20986 transitions. Second operand 3 states. [2020-12-22 01:21:48,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:21:48,401 INFO L93 Difference]: Finished difference Result 41311 states and 53465 transitions. [2020-12-22 01:21:48,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:21:48,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 372 [2020-12-22 01:21:48,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:21:48,455 INFO L225 Difference]: With dead ends: 41311 [2020-12-22 01:21:48,455 INFO L226 Difference]: Without dead ends: 24787 [2020-12-22 01:21:48,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:21:48,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24787 states. [2020-12-22 01:21:48,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24787 to 24787. [2020-12-22 01:21:48,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24787 states. [2020-12-22 01:21:48,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24787 states to 24787 states and 31589 transitions. [2020-12-22 01:21:48,871 INFO L78 Accepts]: Start accepts. Automaton has 24787 states and 31589 transitions. Word has length 372 [2020-12-22 01:21:48,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:21:48,871 INFO L481 AbstractCegarLoop]: Abstraction has 24787 states and 31589 transitions. [2020-12-22 01:21:48,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:21:48,872 INFO L276 IsEmpty]: Start isEmpty. Operand 24787 states and 31589 transitions. [2020-12-22 01:21:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2020-12-22 01:21:48,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:21:48,881 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:21:48,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 01:21:48,881 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:21:48,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:21:48,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1271184510, now seen corresponding path program 1 times [2020-12-22 01:21:48,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:21:48,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391898822] [2020-12-22 01:21:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:21:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:21:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-22 01:21:49,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391898822] [2020-12-22 01:21:49,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:21:49,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:21:49,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257667979] [2020-12-22 01:21:49,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:21:49,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:21:49,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:21:49,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:21:49,148 INFO L87 Difference]: Start difference. First operand 24787 states and 31589 transitions. Second operand 3 states. [2020-12-22 01:21:56,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:21:56,916 INFO L93 Difference]: Finished difference Result 51825 states and 65723 transitions. [2020-12-22 01:21:56,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:21:56,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 384 [2020-12-22 01:21:56,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:21:56,994 INFO L225 Difference]: With dead ends: 51825 [2020-12-22 01:21:56,994 INFO L226 Difference]: Without dead ends: 27040 [2020-12-22 01:21:57,021 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 [2020-12-22 01:21:57,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27040 states. [2020-12-22 01:21:57,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27040 to 27040. [2020-12-22 01:21:57,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27040 states. [2020-12-22 01:21:57,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27040 states to 27040 states and 32928 transitions. [2020-12-22 01:21:57,456 INFO L78 Accepts]: Start accepts. Automaton has 27040 states and 32928 transitions. Word has length 384 [2020-12-22 01:21:57,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:21:57,457 INFO L481 AbstractCegarLoop]: Abstraction has 27040 states and 32928 transitions. [2020-12-22 01:21:57,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:21:57,457 INFO L276 IsEmpty]: Start isEmpty. Operand 27040 states and 32928 transitions. [2020-12-22 01:21:57,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2020-12-22 01:21:57,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:21:57,469 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:21:57,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 01:21:57,469 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:21:57,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:21:57,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1281131828, now seen corresponding path program 1 times [2020-12-22 01:21:57,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:21:57,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21802987] [2020-12-22 01:21:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:21:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:21:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 385 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-12-22 01:21:57,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21802987] [2020-12-22 01:21:57,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:21:57,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:21:57,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947517051] [2020-12-22 01:21:57,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:21:57,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:21:57,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:21:57,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:21:57,927 INFO L87 Difference]: Start difference. First operand 27040 states and 32928 transitions. Second operand 3 states. [2020-12-22 01:22:05,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:22:05,818 INFO L93 Difference]: Finished difference Result 66845 states and 81077 transitions. [2020-12-22 01:22:05,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:22:05,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 388 [2020-12-22 01:22:05,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:22:05,877 INFO L225 Difference]: With dead ends: 66845 [2020-12-22 01:22:05,878 INFO L226 Difference]: Without dead ends: 39807 [2020-12-22 01:22:05,898 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 [2020-12-22 01:22:05,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39807 states. [2020-12-22 01:22:06,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39807 to 39056. [2020-12-22 01:22:06,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39056 states. [2020-12-22 01:22:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39056 states to 39056 states and 46082 transitions. [2020-12-22 01:22:06,433 INFO L78 Accepts]: Start accepts. Automaton has 39056 states and 46082 transitions. Word has length 388 [2020-12-22 01:22:06,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:22:06,434 INFO L481 AbstractCegarLoop]: Abstraction has 39056 states and 46082 transitions. [2020-12-22 01:22:06,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:22:06,434 INFO L276 IsEmpty]: Start isEmpty. Operand 39056 states and 46082 transitions. [2020-12-22 01:22:06,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-12-22 01:22:06,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:22:06,442 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:22:06,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 01:22:06,443 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:22:06,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:22:06,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1196082434, now seen corresponding path program 1 times [2020-12-22 01:22:06,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:22:06,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987148712] [2020-12-22 01:22:06,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:22:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:22:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 385 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-22 01:22:06,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987148712] [2020-12-22 01:22:06,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:22:06,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:22:06,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631629829] [2020-12-22 01:22:06,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:22:06,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:22:06,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:22:06,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:22:06,727 INFO L87 Difference]: Start difference. First operand 39056 states and 46082 transitions. Second operand 3 states. [2020-12-22 01:22:14,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:22:14,780 INFO L93 Difference]: Finished difference Result 81865 states and 96021 transitions. [2020-12-22 01:22:14,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:22:14,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 397 [2020-12-22 01:22:14,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:22:14,849 INFO L225 Difference]: With dead ends: 81865 [2020-12-22 01:22:14,849 INFO L226 Difference]: Without dead ends: 42060 [2020-12-22 01:22:14,874 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 [2020-12-22 01:22:14,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42060 states. [2020-12-22 01:22:15,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42060 to 39056. [2020-12-22 01:22:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39056 states. [2020-12-22 01:22:15,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39056 states to 39056 states and 44881 transitions. [2020-12-22 01:22:15,402 INFO L78 Accepts]: Start accepts. Automaton has 39056 states and 44881 transitions. Word has length 397 [2020-12-22 01:22:15,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:22:15,403 INFO L481 AbstractCegarLoop]: Abstraction has 39056 states and 44881 transitions. [2020-12-22 01:22:15,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:22:15,403 INFO L276 IsEmpty]: Start isEmpty. Operand 39056 states and 44881 transitions. [2020-12-22 01:22:15,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-12-22 01:22:15,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:22:15,409 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:22:15,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 01:22:15,409 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:22:15,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:22:15,410 INFO L82 PathProgramCache]: Analyzing trace with hash 908778568, now seen corresponding path program 1 times [2020-12-22 01:22:15,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:22:15,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559419563] [2020-12-22 01:22:15,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:22:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:22:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 241 proven. 108 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-12-22 01:22:16,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559419563] [2020-12-22 01:22:16,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026479162] [2020-12-22 01:22:16,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:22:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:22:16,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 01:22:16,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:22:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-12-22 01:22:17,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:22:17,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-12-22 01:22:17,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652348554] [2020-12-22 01:22:17,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:22:17,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:22:17,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:22:17,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:22:17,598 INFO L87 Difference]: Start difference. First operand 39056 states and 44881 transitions. Second operand 3 states. [2020-12-22 01:22:26,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:22:26,157 INFO L93 Difference]: Finished difference Result 87122 states and 100527 transitions. [2020-12-22 01:22:26,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:22:26,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 401 [2020-12-22 01:22:26,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:22:26,224 INFO L225 Difference]: With dead ends: 87122 [2020-12-22 01:22:26,225 INFO L226 Difference]: Without dead ends: 48819 [2020-12-22 01:22:26,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:22:26,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48819 states. [2020-12-22 01:22:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48819 to 48819. [2020-12-22 01:22:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48819 states. [2020-12-22 01:22:27,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48819 states to 48819 states and 55507 transitions. [2020-12-22 01:22:27,065 INFO L78 Accepts]: Start accepts. Automaton has 48819 states and 55507 transitions. Word has length 401 [2020-12-22 01:22:27,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:22:27,066 INFO L481 AbstractCegarLoop]: Abstraction has 48819 states and 55507 transitions. [2020-12-22 01:22:27,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:22:27,066 INFO L276 IsEmpty]: Start isEmpty. Operand 48819 states and 55507 transitions. [2020-12-22 01:22:27,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2020-12-22 01:22:27,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:22:27,087 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:22:27,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:22:27,301 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:22:27,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:22:27,302 INFO L82 PathProgramCache]: Analyzing trace with hash -384257223, now seen corresponding path program 1 times [2020-12-22 01:22:27,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:22:27,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721486011] [2020-12-22 01:22:27,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:22:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:22:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 328 proven. 108 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-12-22 01:22:28,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721486011] [2020-12-22 01:22:28,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689599684] [2020-12-22 01:22:28,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:22:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:22:28,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 01:22:28,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:22:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 504 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-22 01:22:29,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:22:29,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2020-12-22 01:22:29,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412585549] [2020-12-22 01:22:29,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:22:29,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:22:29,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:22:29,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:22:29,437 INFO L87 Difference]: Start difference. First operand 48819 states and 55507 transitions. Second operand 3 states. [2020-12-22 01:22:38,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:22:38,725 INFO L93 Difference]: Finished difference Result 108901 states and 124243 transitions. [2020-12-22 01:22:38,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:22:38,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 535 [2020-12-22 01:22:38,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:22:38,841 INFO L225 Difference]: With dead ends: 108901 [2020-12-22 01:22:38,841 INFO L226 Difference]: Without dead ends: 60835 [2020-12-22 01:22:38,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:22:38,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60835 states. [2020-12-22 01:22:40,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60835 to 60835. [2020-12-22 01:22:40,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60835 states. [2020-12-22 01:22:40,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60835 states to 60835 states and 68777 transitions. [2020-12-22 01:22:40,165 INFO L78 Accepts]: Start accepts. Automaton has 60835 states and 68777 transitions. Word has length 535 [2020-12-22 01:22:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:22:40,166 INFO L481 AbstractCegarLoop]: Abstraction has 60835 states and 68777 transitions. [2020-12-22 01:22:40,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:22:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 60835 states and 68777 transitions. [2020-12-22 01:22:40,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2020-12-22 01:22:40,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:22:40,189 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:22:40,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 01:22:40,405 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:22:40,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:22:40,407 INFO L82 PathProgramCache]: Analyzing trace with hash 505455726, now seen corresponding path program 1 times [2020-12-22 01:22:40,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:22:40,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283649198] [2020-12-22 01:22:40,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:22:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:22:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 565 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-22 01:22:41,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283649198] [2020-12-22 01:22:41,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:22:41,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:22:41,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928289046] [2020-12-22 01:22:41,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:22:41,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:22:41,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:22:41,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:22:41,194 INFO L87 Difference]: Start difference. First operand 60835 states and 68777 transitions. Second operand 3 states. [2020-12-22 01:22:51,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:22:51,090 INFO L93 Difference]: Finished difference Result 120917 states and 136796 transitions. [2020-12-22 01:22:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:22:51,093 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 577 [2020-12-22 01:22:51,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:22:51,192 INFO L225 Difference]: With dead ends: 120917 [2020-12-22 01:22:51,192 INFO L226 Difference]: Without dead ends: 60835 [2020-12-22 01:22:51,218 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 [2020-12-22 01:22:51,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60835 states. [2020-12-22 01:22:52,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60835 to 60835. [2020-12-22 01:22:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60835 states. [2020-12-22 01:22:52,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60835 states to 60835 states and 66815 transitions. [2020-12-22 01:22:52,271 INFO L78 Accepts]: Start accepts. Automaton has 60835 states and 66815 transitions. Word has length 577 [2020-12-22 01:22:52,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:22:52,272 INFO L481 AbstractCegarLoop]: Abstraction has 60835 states and 66815 transitions. [2020-12-22 01:22:52,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:22:52,272 INFO L276 IsEmpty]: Start isEmpty. Operand 60835 states and 66815 transitions. [2020-12-22 01:22:52,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2020-12-22 01:22:52,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:22:52,296 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:22:52,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 01:22:52,296 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:22:52,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:22:52,297 INFO L82 PathProgramCache]: Analyzing trace with hash 329056128, now seen corresponding path program 1 times [2020-12-22 01:22:52,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:22:52,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172112387] [2020-12-22 01:22:52,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:22:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:22:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-22 01:22:53,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172112387] [2020-12-22 01:22:53,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:22:53,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 01:22:53,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526830807] [2020-12-22 01:22:53,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:22:53,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:22:53,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:22:53,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:22:53,802 INFO L87 Difference]: Start difference. First operand 60835 states and 66815 transitions. Second operand 4 states. [2020-12-22 01:23:06,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:23:06,192 INFO L93 Difference]: Finished difference Result 122789 states and 134885 transitions. [2020-12-22 01:23:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 01:23:06,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 601 [2020-12-22 01:23:06,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:23:06,314 INFO L225 Difference]: With dead ends: 122789 [2020-12-22 01:23:06,315 INFO L226 Difference]: Without dead ends: 61956 [2020-12-22 01:23:06,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:23:06,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61956 states. [2020-12-22 01:23:07,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61956 to 61586. [2020-12-22 01:23:07,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61586 states. [2020-12-22 01:23:07,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61586 states to 61586 states and 67586 transitions. [2020-12-22 01:23:07,631 INFO L78 Accepts]: Start accepts. Automaton has 61586 states and 67586 transitions. Word has length 601 [2020-12-22 01:23:07,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:23:07,632 INFO L481 AbstractCegarLoop]: Abstraction has 61586 states and 67586 transitions. [2020-12-22 01:23:07,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:23:07,632 INFO L276 IsEmpty]: Start isEmpty. Operand 61586 states and 67586 transitions. [2020-12-22 01:23:07,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2020-12-22 01:23:07,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:23:07,653 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:23:07,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 01:23:07,654 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:23:07,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:23:07,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1253367643, now seen corresponding path program 1 times [2020-12-22 01:23:07,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:23:07,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059800444] [2020-12-22 01:23:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:23:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:23:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 159 proven. 372 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-12-22 01:23:09,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059800444] [2020-12-22 01:23:09,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79858568] [2020-12-22 01:23:09,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:23:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:23:09,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 01:23:09,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:23:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 419 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2020-12-22 01:23:12,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:23:12,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2020-12-22 01:23:12,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98278070] [2020-12-22 01:23:12,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:23:12,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:23:12,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:23:12,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 01:23:12,168 INFO L87 Difference]: Start difference. First operand 61586 states and 67586 transitions. Second operand 3 states. [2020-12-22 01:23:23,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:23:23,364 INFO L93 Difference]: Finished difference Result 146451 states and 161863 transitions. [2020-12-22 01:23:23,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:23:23,367 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 602 [2020-12-22 01:23:23,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:23:23,495 INFO L225 Difference]: With dead ends: 146451 [2020-12-22 01:23:23,496 INFO L226 Difference]: Without dead ends: 85618 [2020-12-22 01:23:23,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 01:23:23,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85618 states. [2020-12-22 01:23:24,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85618 to 84867. [2020-12-22 01:23:24,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84867 states. [2020-12-22 01:23:25,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84867 states to 84867 states and 91797 transitions. [2020-12-22 01:23:25,250 INFO L78 Accepts]: Start accepts. Automaton has 84867 states and 91797 transitions. Word has length 602 [2020-12-22 01:23:25,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:23:25,251 INFO L481 AbstractCegarLoop]: Abstraction has 84867 states and 91797 transitions. [2020-12-22 01:23:25,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:23:25,254 INFO L276 IsEmpty]: Start isEmpty. Operand 84867 states and 91797 transitions. [2020-12-22 01:23:25,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2020-12-22 01:23:25,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:23:25,305 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:23:25,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:23:25,520 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:23:25,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:23:25,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1807713993, now seen corresponding path program 1 times [2020-12-22 01:23:25,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:23:25,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534083436] [2020-12-22 01:23:25,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:23:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:23:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 712 proven. 0 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2020-12-22 01:23:26,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534083436] [2020-12-22 01:23:26,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:23:26,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:23:26,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576371059] [2020-12-22 01:23:26,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:23:26,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:23:26,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:23:26,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:23:26,307 INFO L87 Difference]: Start difference. First operand 84867 states and 91797 transitions. Second operand 3 states. [2020-12-22 01:23:40,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:23:40,208 INFO L93 Difference]: Finished difference Result 199021 states and 216132 transitions. [2020-12-22 01:23:40,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:23:40,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 639 [2020-12-22 01:23:40,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:23:40,375 INFO L225 Difference]: With dead ends: 199021 [2020-12-22 01:23:40,375 INFO L226 Difference]: Without dead ends: 114907 [2020-12-22 01:23:40,428 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 [2020-12-22 01:23:40,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114907 states. [2020-12-22 01:23:41,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114907 to 110401. [2020-12-22 01:23:41,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110401 states. [2020-12-22 01:23:42,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110401 states to 110401 states and 119690 transitions. [2020-12-22 01:23:42,364 INFO L78 Accepts]: Start accepts. Automaton has 110401 states and 119690 transitions. Word has length 639 [2020-12-22 01:23:42,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:23:42,365 INFO L481 AbstractCegarLoop]: Abstraction has 110401 states and 119690 transitions. [2020-12-22 01:23:42,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:23:42,365 INFO L276 IsEmpty]: Start isEmpty. Operand 110401 states and 119690 transitions. [2020-12-22 01:23:42,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 653 [2020-12-22 01:23:42,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:23:42,421 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:23:42,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 01:23:42,421 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:23:42,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:23:42,422 INFO L82 PathProgramCache]: Analyzing trace with hash -727568463, now seen corresponding path program 1 times [2020-12-22 01:23:42,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:23:42,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472981831] [2020-12-22 01:23:42,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:23:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:23:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2020-12-22 01:23:43,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472981831] [2020-12-22 01:23:43,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:23:43,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:23:43,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758693238] [2020-12-22 01:23:43,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:23:43,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:23:43,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:23:43,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:23:43,228 INFO L87 Difference]: Start difference. First operand 110401 states and 119690 transitions. Second operand 3 states. [2020-12-22 01:23:54,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:23:54,696 INFO L93 Difference]: Finished difference Result 222302 states and 240891 transitions. [2020-12-22 01:23:54,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:23:54,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 652 [2020-12-22 01:23:54,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:23:54,863 INFO L225 Difference]: With dead ends: 222302 [2020-12-22 01:23:54,863 INFO L226 Difference]: Without dead ends: 110401 [2020-12-22 01:23:54,929 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 [2020-12-22 01:23:55,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110401 states. [2020-12-22 01:23:56,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110401 to 103642. [2020-12-22 01:23:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103642 states. [2020-12-22 01:23:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103642 states to 103642 states and 111068 transitions. [2020-12-22 01:23:57,439 INFO L78 Accepts]: Start accepts. Automaton has 103642 states and 111068 transitions. Word has length 652 [2020-12-22 01:23:57,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:23:57,440 INFO L481 AbstractCegarLoop]: Abstraction has 103642 states and 111068 transitions. [2020-12-22 01:23:57,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:23:57,440 INFO L276 IsEmpty]: Start isEmpty. Operand 103642 states and 111068 transitions. [2020-12-22 01:23:57,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2020-12-22 01:23:57,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:23:57,463 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:23:57,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 01:23:57,464 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:23:57,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:23:57,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1958326067, now seen corresponding path program 1 times [2020-12-22 01:23:57,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:23:57,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455586935] [2020-12-22 01:23:57,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:23:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:24:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 281 proven. 360 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-22 01:24:00,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455586935] [2020-12-22 01:24:00,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852212587] [2020-12-22 01:24:00,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:24:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:24:00,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 01:24:00,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:24:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 641 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-22 01:24:03,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:24:03,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2020-12-22 01:24:03,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65910797] [2020-12-22 01:24:03,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:24:03,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:24:03,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:24:03,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-22 01:24:03,635 INFO L87 Difference]: Start difference. First operand 103642 states and 111068 transitions. Second operand 4 states. [2020-12-22 01:24:25,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:24:25,090 INFO L93 Difference]: Finished difference Result 212539 states and 227584 transitions. [2020-12-22 01:24:25,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:24:25,094 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 678 [2020-12-22 01:24:25,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:24:25,264 INFO L225 Difference]: With dead ends: 212539 [2020-12-22 01:24:25,264 INFO L226 Difference]: Without dead ends: 109650 [2020-12-22 01:24:25,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 676 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-22 01:24:25,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109650 states.