/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/Problem13_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 01:42:35,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 01:42:35,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 01:42:35,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 01:42:35,450 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 01:42:35,524 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 01:42:35,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 01:42:35,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 01:42:35,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 01:42:35,533 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 01:42:35,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 01:42:35,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 01:42:35,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 01:42:35,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 01:42:35,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 01:42:35,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 01:42:35,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 01:42:35,537 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 01:42:35,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 01:42:35,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 01:42:35,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 01:42:35,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 01:42:35,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 01:42:35,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 01:42:35,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 01:42:35,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 01:42:35,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 01:42:35,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 01:42:35,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 01:42:35,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 01:42:35,541 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 01:42:36,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 01:42:36,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 01:42:36,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 01:42:36,118 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 01:42:36,119 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 01:42:36,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label27.c [2020-12-22 01:42:36,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1d506d53/3555822ed97e40cf98eebf7f96f95fc5/FLAG51cbe7c92 [2020-12-22 01:42:37,678 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 01:42:37,679 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label27.c [2020-12-22 01:42:37,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1d506d53/3555822ed97e40cf98eebf7f96f95fc5/FLAG51cbe7c92 [2020-12-22 01:42:37,937 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1d506d53/3555822ed97e40cf98eebf7f96f95fc5 [2020-12-22 01:42:37,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 01:42:37,946 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 01:42:37,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 01:42:37,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 01:42:37,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 01:42:37,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:42:37" (1/1) ... [2020-12-22 01:42:37,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15fd6660 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:37, skipping insertion in model container [2020-12-22 01:42:37,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:42:37" (1/1) ... [2020-12-22 01:42:37,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 01:42:38,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 01:42:38,676 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/Problem13_label27.c[6468,6481] [2020-12-22 01:42:40,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:42:40,391 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 01:42:40,451 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/Problem13_label27.c[6468,6481] [2020-12-22 01:42:41,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:42:41,400 INFO L208 MainTranslator]: Completed translation [2020-12-22 01:42:41,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:41 WrapperNode [2020-12-22 01:42:41,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 01:42:41,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 01:42:41,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 01:42:41,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 01:42:41,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:41" (1/1) ... [2020-12-22 01:42:41,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:41" (1/1) ... [2020-12-22 01:42:42,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 01:42:42,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 01:42:42,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 01:42:42,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 01:42:42,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:41" (1/1) ... [2020-12-22 01:42:42,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:41" (1/1) ... [2020-12-22 01:42:42,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:41" (1/1) ... [2020-12-22 01:42:42,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:41" (1/1) ... [2020-12-22 01:42:42,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:41" (1/1) ... [2020-12-22 01:42:43,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:41" (1/1) ... [2020-12-22 01:42:43,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:41" (1/1) ... [2020-12-22 01:42:43,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 01:42:43,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 01:42:43,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 01:42:43,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 01:42:43,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:41" (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 01:42:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 01:42:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 01:42:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 01:42:43,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 01:42:51,609 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 01:42:51,610 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 01:42:51,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:42:51 BoogieIcfgContainer [2020-12-22 01:42:51,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 01:42:51,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 01:42:51,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 01:42:51,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 01:42:51,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:42:37" (1/3) ... [2020-12-22 01:42:51,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4889dff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:42:51, skipping insertion in model container [2020-12-22 01:42:51,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:42:41" (2/3) ... [2020-12-22 01:42:51,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4889dff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:42:51, skipping insertion in model container [2020-12-22 01:42:51,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:42:51" (3/3) ... [2020-12-22 01:42:51,628 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label27.c [2020-12-22 01:42:51,637 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 01:42:51,646 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 01:42:51,676 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 01:42:51,722 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 01:42:51,723 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 01:42:51,723 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 01:42:51,723 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 01:42:51,724 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 01:42:51,724 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 01:42:51,724 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 01:42:51,724 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 01:42:51,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states. [2020-12-22 01:42:51,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 01:42:51,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:42:51,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:42:51,786 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:42:51,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:42:51,795 INFO L82 PathProgramCache]: Analyzing trace with hash -2068820151, now seen corresponding path program 1 times [2020-12-22 01:42:51,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:42:51,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593617710] [2020-12-22 01:42:51,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:42:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:42:52,333 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 01:42:52,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593617710] [2020-12-22 01:42:52,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:42:52,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:42:52,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315269189] [2020-12-22 01:42:52,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:42:52,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:42:52,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:42:52,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:42:52,367 INFO L87 Difference]: Start difference. First operand 1098 states. Second operand 3 states. [2020-12-22 01:43:01,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:43:01,088 INFO L93 Difference]: Finished difference Result 3160 states and 5843 transitions. [2020-12-22 01:43:01,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:43:01,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-12-22 01:43:01,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:43:01,139 INFO L225 Difference]: With dead ends: 3160 [2020-12-22 01:43:01,140 INFO L226 Difference]: Without dead ends: 1983 [2020-12-22 01:43:01,158 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 01:43:01,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2020-12-22 01:43:01,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1930. [2020-12-22 01:43:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-12-22 01:43:01,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3467 transitions. [2020-12-22 01:43:01,378 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3467 transitions. Word has length 45 [2020-12-22 01:43:01,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:43:01,379 INFO L481 AbstractCegarLoop]: Abstraction has 1930 states and 3467 transitions. [2020-12-22 01:43:01,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:43:01,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3467 transitions. [2020-12-22 01:43:01,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 01:43:01,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:43:01,384 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 01:43:01,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 01:43:01,385 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:43:01,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:43:01,386 INFO L82 PathProgramCache]: Analyzing trace with hash 331802818, now seen corresponding path program 1 times [2020-12-22 01:43:01,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:43:01,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070789402] [2020-12-22 01:43:01,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:43:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:43:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:43:01,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070789402] [2020-12-22 01:43:01,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:43:01,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:43:01,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810288933] [2020-12-22 01:43:01,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:43:01,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:43:01,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:43:01,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:43:01,594 INFO L87 Difference]: Start difference. First operand 1930 states and 3467 transitions. Second operand 3 states. [2020-12-22 01:43:08,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:43:08,419 INFO L93 Difference]: Finished difference Result 5456 states and 9917 transitions. [2020-12-22 01:43:08,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:43:08,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2020-12-22 01:43:08,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:43:08,444 INFO L225 Difference]: With dead ends: 5456 [2020-12-22 01:43:08,445 INFO L226 Difference]: Without dead ends: 3528 [2020-12-22 01:43:08,451 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 01:43:08,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2020-12-22 01:43:08,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 3526. [2020-12-22 01:43:08,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3526 states. [2020-12-22 01:43:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 5524 transitions. [2020-12-22 01:43:08,542 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 5524 transitions. Word has length 110 [2020-12-22 01:43:08,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:43:08,543 INFO L481 AbstractCegarLoop]: Abstraction has 3526 states and 5524 transitions. [2020-12-22 01:43:08,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:43:08,543 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 5524 transitions. [2020-12-22 01:43:08,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 01:43:08,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:43:08,547 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 01:43:08,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 01:43:08,547 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:43:08,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:43:08,548 INFO L82 PathProgramCache]: Analyzing trace with hash -748334831, now seen corresponding path program 1 times [2020-12-22 01:43:08,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:43:08,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919536612] [2020-12-22 01:43:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:43:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:43:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:43:08,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919536612] [2020-12-22 01:43:08,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:43:08,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:43:08,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061818014] [2020-12-22 01:43:08,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:43:08,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:43:08,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:43:08,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:43:08,818 INFO L87 Difference]: Start difference. First operand 3526 states and 5524 transitions. Second operand 3 states. [2020-12-22 01:43:16,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:43:16,110 INFO L93 Difference]: Finished difference Result 10232 states and 16097 transitions. [2020-12-22 01:43:16,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:43:16,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2020-12-22 01:43:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:43:16,152 INFO L225 Difference]: With dead ends: 10232 [2020-12-22 01:43:16,152 INFO L226 Difference]: Without dead ends: 6708 [2020-12-22 01:43:16,163 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 01:43:16,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6708 states. [2020-12-22 01:43:16,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6708 to 6700. [2020-12-22 01:43:16,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6700 states. [2020-12-22 01:43:16,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6700 states to 6700 states and 9466 transitions. [2020-12-22 01:43:16,367 INFO L78 Accepts]: Start accepts. Automaton has 6700 states and 9466 transitions. Word has length 116 [2020-12-22 01:43:16,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:43:16,368 INFO L481 AbstractCegarLoop]: Abstraction has 6700 states and 9466 transitions. [2020-12-22 01:43:16,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:43:16,368 INFO L276 IsEmpty]: Start isEmpty. Operand 6700 states and 9466 transitions. [2020-12-22 01:43:16,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 01:43:16,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:43:16,372 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 01:43:16,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 01:43:16,372 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:43:16,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:43:16,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1036466844, now seen corresponding path program 1 times [2020-12-22 01:43:16,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:43:16,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390286270] [2020-12-22 01:43:16,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:43:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:43:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:43:16,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390286270] [2020-12-22 01:43:16,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:43:16,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:43:16,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118567841] [2020-12-22 01:43:16,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:43:16,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:43:16,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:43:16,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:43:16,614 INFO L87 Difference]: Start difference. First operand 6700 states and 9466 transitions. Second operand 3 states. [2020-12-22 01:43:24,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:43:24,353 INFO L93 Difference]: Finished difference Result 19731 states and 27908 transitions. [2020-12-22 01:43:24,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:43:24,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2020-12-22 01:43:24,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:43:24,414 INFO L225 Difference]: With dead ends: 19731 [2020-12-22 01:43:24,414 INFO L226 Difference]: Without dead ends: 13033 [2020-12-22 01:43:24,431 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 01:43:24,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13033 states. [2020-12-22 01:43:24,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13033 to 13011. [2020-12-22 01:43:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13011 states. [2020-12-22 01:43:24,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13011 states to 13011 states and 16415 transitions. [2020-12-22 01:43:24,784 INFO L78 Accepts]: Start accepts. Automaton has 13011 states and 16415 transitions. Word has length 146 [2020-12-22 01:43:24,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:43:24,787 INFO L481 AbstractCegarLoop]: Abstraction has 13011 states and 16415 transitions. [2020-12-22 01:43:24,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:43:24,787 INFO L276 IsEmpty]: Start isEmpty. Operand 13011 states and 16415 transitions. [2020-12-22 01:43:24,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-22 01:43:24,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:43:24,799 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 01:43:24,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 01:43:24,800 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:43:24,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:43:24,801 INFO L82 PathProgramCache]: Analyzing trace with hash -753731228, now seen corresponding path program 1 times [2020-12-22 01:43:24,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:43:24,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853499971] [2020-12-22 01:43:24,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:43:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:43:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:43:25,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853499971] [2020-12-22 01:43:25,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:43:25,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:43:25,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268843352] [2020-12-22 01:43:25,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:43:25,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:43:25,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:43:25,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:43:25,237 INFO L87 Difference]: Start difference. First operand 13011 states and 16415 transitions. Second operand 4 states. [2020-12-22 01:43:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:43:37,992 INFO L93 Difference]: Finished difference Result 33117 states and 40889 transitions. [2020-12-22 01:43:37,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:43:37,997 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2020-12-22 01:43:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:43:38,070 INFO L225 Difference]: With dead ends: 33117 [2020-12-22 01:43:38,070 INFO L226 Difference]: Without dead ends: 20108 [2020-12-22 01:43:38,099 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 01:43:38,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20108 states. [2020-12-22 01:43:38,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20108 to 20103. [2020-12-22 01:43:38,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20103 states. [2020-12-22 01:43:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20103 states to 20103 states and 24080 transitions. [2020-12-22 01:43:38,639 INFO L78 Accepts]: Start accepts. Automaton has 20103 states and 24080 transitions. Word has length 161 [2020-12-22 01:43:38,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:43:38,639 INFO L481 AbstractCegarLoop]: Abstraction has 20103 states and 24080 transitions. [2020-12-22 01:43:38,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:43:38,640 INFO L276 IsEmpty]: Start isEmpty. Operand 20103 states and 24080 transitions. [2020-12-22 01:43:38,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-12-22 01:43:38,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:43:38,649 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 01:43:38,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 01:43:38,650 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:43:38,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:43:38,650 INFO L82 PathProgramCache]: Analyzing trace with hash 51366632, now seen corresponding path program 1 times [2020-12-22 01:43:38,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:43:38,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549174508] [2020-12-22 01:43:38,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:43:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:43:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:43:39,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549174508] [2020-12-22 01:43:39,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:43:39,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:43:39,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781903639] [2020-12-22 01:43:39,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:43:39,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:43:39,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:43:39,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:43:39,211 INFO L87 Difference]: Start difference. First operand 20103 states and 24080 transitions. Second operand 3 states. [2020-12-22 01:43:49,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:43:49,010 INFO L93 Difference]: Finished difference Result 51217 states and 62361 transitions. [2020-12-22 01:43:49,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:43:49,013 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 259 [2020-12-22 01:43:49,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:43:49,095 INFO L225 Difference]: With dead ends: 51217 [2020-12-22 01:43:49,095 INFO L226 Difference]: Without dead ends: 31903 [2020-12-22 01:43:49,127 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 01:43:49,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31903 states. [2020-12-22 01:43:49,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31903 to 30324. [2020-12-22 01:43:49,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30324 states. [2020-12-22 01:43:49,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30324 states to 30324 states and 35717 transitions. [2020-12-22 01:43:49,760 INFO L78 Accepts]: Start accepts. Automaton has 30324 states and 35717 transitions. Word has length 259 [2020-12-22 01:43:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:43:49,761 INFO L481 AbstractCegarLoop]: Abstraction has 30324 states and 35717 transitions. [2020-12-22 01:43:49,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:43:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 30324 states and 35717 transitions. [2020-12-22 01:43:49,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-12-22 01:43:49,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:43:49,768 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-12-22 01:43:49,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 01:43:49,769 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:43:49,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:43:49,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1608424042, now seen corresponding path program 1 times [2020-12-22 01:43:49,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:43:49,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849953069] [2020-12-22 01:43:49,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:43:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:43:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:43:50,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849953069] [2020-12-22 01:43:50,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:43:50,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:43:50,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104137495] [2020-12-22 01:43:50,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:43:50,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:43:50,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:43:50,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:43:50,425 INFO L87 Difference]: Start difference. First operand 30324 states and 35717 transitions. Second operand 3 states. [2020-12-22 01:44:00,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:44:00,767 INFO L93 Difference]: Finished difference Result 74823 states and 89744 transitions. [2020-12-22 01:44:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:44:00,773 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 272 [2020-12-22 01:44:00,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:44:00,889 INFO L225 Difference]: With dead ends: 74823 [2020-12-22 01:44:00,890 INFO L226 Difference]: Without dead ends: 45288 [2020-12-22 01:44:00,922 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 01:44:00,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45288 states. [2020-12-22 01:44:01,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45288 to 43704. [2020-12-22 01:44:01,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43704 states. [2020-12-22 01:44:01,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43704 states to 43704 states and 50947 transitions. [2020-12-22 01:44:01,717 INFO L78 Accepts]: Start accepts. Automaton has 43704 states and 50947 transitions. Word has length 272 [2020-12-22 01:44:01,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:44:01,717 INFO L481 AbstractCegarLoop]: Abstraction has 43704 states and 50947 transitions. [2020-12-22 01:44:01,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:44:01,718 INFO L276 IsEmpty]: Start isEmpty. Operand 43704 states and 50947 transitions. [2020-12-22 01:44:02,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-12-22 01:44:02,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:44:02,059 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-12-22 01:44:02,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 01:44:02,059 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:44:02,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:44:02,066 INFO L82 PathProgramCache]: Analyzing trace with hash -625904064, now seen corresponding path program 1 times [2020-12-22 01:44:02,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:44:02,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532694116] [2020-12-22 01:44:02,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:44:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:44:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-22 01:44:02,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532694116] [2020-12-22 01:44:02,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:44:02,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:44:02,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500933323] [2020-12-22 01:44:02,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:44:02,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:44:02,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:44:02,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:44:02,765 INFO L87 Difference]: Start difference. First operand 43704 states and 50947 transitions. Second operand 3 states. [2020-12-22 01:44:13,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:44:13,975 INFO L93 Difference]: Finished difference Result 101579 states and 120027 transitions. [2020-12-22 01:44:13,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:44:13,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 360 [2020-12-22 01:44:13,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:44:14,089 INFO L225 Difference]: With dead ends: 101579 [2020-12-22 01:44:14,089 INFO L226 Difference]: Without dead ends: 58664 [2020-12-22 01:44:14,126 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 01:44:14,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58664 states. [2020-12-22 01:44:14,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58664 to 56298. [2020-12-22 01:44:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56298 states. [2020-12-22 01:44:15,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56298 states to 56298 states and 64529 transitions. [2020-12-22 01:44:15,031 INFO L78 Accepts]: Start accepts. Automaton has 56298 states and 64529 transitions. Word has length 360 [2020-12-22 01:44:15,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:44:15,032 INFO L481 AbstractCegarLoop]: Abstraction has 56298 states and 64529 transitions. [2020-12-22 01:44:15,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:44:15,032 INFO L276 IsEmpty]: Start isEmpty. Operand 56298 states and 64529 transitions. [2020-12-22 01:44:15,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-12-22 01:44:15,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:44:15,042 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-12-22 01:44:15,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 01:44:15,043 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:44:15,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:44:15,043 INFO L82 PathProgramCache]: Analyzing trace with hash 934015421, now seen corresponding path program 1 times [2020-12-22 01:44:15,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:44:15,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743567633] [2020-12-22 01:44:15,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:44:15,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:44:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 01:44:15,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743567633] [2020-12-22 01:44:15,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:44:15,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:44:15,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46135495] [2020-12-22 01:44:15,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:44:15,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:44:15,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:44:15,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:44:15,732 INFO L87 Difference]: Start difference. First operand 56298 states and 64529 transitions. Second operand 3 states. [2020-12-22 01:44:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:44:26,360 INFO L93 Difference]: Finished difference Result 126776 states and 147187 transitions. [2020-12-22 01:44:26,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:44:26,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 361 [2020-12-22 01:44:26,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:44:26,498 INFO L225 Difference]: With dead ends: 126776 [2020-12-22 01:44:26,498 INFO L226 Difference]: Without dead ends: 69693 [2020-12-22 01:44:26,534 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 01:44:26,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69693 states. [2020-12-22 01:44:27,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69693 to 69675. [2020-12-22 01:44:27,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69675 states. [2020-12-22 01:44:27,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69675 states to 69675 states and 78700 transitions. [2020-12-22 01:44:27,672 INFO L78 Accepts]: Start accepts. Automaton has 69675 states and 78700 transitions. Word has length 361 [2020-12-22 01:44:27,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:44:27,673 INFO L481 AbstractCegarLoop]: Abstraction has 69675 states and 78700 transitions. [2020-12-22 01:44:27,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:44:27,673 INFO L276 IsEmpty]: Start isEmpty. Operand 69675 states and 78700 transitions. [2020-12-22 01:44:27,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-12-22 01:44:27,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:44:27,687 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-12-22 01:44:27,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 01:44:27,687 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:44:27,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:44:27,688 INFO L82 PathProgramCache]: Analyzing trace with hash -572756947, now seen corresponding path program 1 times [2020-12-22 01:44:27,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:44:27,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124510348] [2020-12-22 01:44:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:44:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:44:28,617 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 375 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-12-22 01:44:28,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124510348] [2020-12-22 01:44:28,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:44:28,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:44:28,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003691280] [2020-12-22 01:44:28,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:44:28,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:44:28,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:44:28,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:44:28,623 INFO L87 Difference]: Start difference. First operand 69675 states and 78700 transitions. Second operand 4 states. [2020-12-22 01:44:42,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:44:42,083 INFO L93 Difference]: Finished difference Result 146432 states and 164878 transitions. [2020-12-22 01:44:42,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:44:42,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 375 [2020-12-22 01:44:42,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:44:42,197 INFO L225 Difference]: With dead ends: 146432 [2020-12-22 01:44:42,197 INFO L226 Difference]: Without dead ends: 75968 [2020-12-22 01:44:42,241 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 01:44:42,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75968 states. [2020-12-22 01:44:43,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75968 to 75180. [2020-12-22 01:44:43,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75180 states. [2020-12-22 01:44:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75180 states to 75180 states and 83643 transitions. [2020-12-22 01:44:43,705 INFO L78 Accepts]: Start accepts. Automaton has 75180 states and 83643 transitions. Word has length 375 [2020-12-22 01:44:43,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:44:43,705 INFO L481 AbstractCegarLoop]: Abstraction has 75180 states and 83643 transitions. [2020-12-22 01:44:43,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:44:43,706 INFO L276 IsEmpty]: Start isEmpty. Operand 75180 states and 83643 transitions. [2020-12-22 01:44:43,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-12-22 01:44:43,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:44:43,719 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:44:43,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 01:44:43,720 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:44:43,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:44:43,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1918911312, now seen corresponding path program 1 times [2020-12-22 01:44:43,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:44:43,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378823647] [2020-12-22 01:44:43,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:44:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:44:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 476 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2020-12-22 01:44:44,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378823647] [2020-12-22 01:44:44,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:44:44,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:44:44,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324218230] [2020-12-22 01:44:44,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:44:44,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:44:44,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:44:44,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:44:44,341 INFO L87 Difference]: Start difference. First operand 75180 states and 83643 transitions. Second operand 4 states. [2020-12-22 01:45:07,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:45:07,583 INFO L93 Difference]: Finished difference Result 208812 states and 232141 transitions. [2020-12-22 01:45:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:45:07,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 393 [2020-12-22 01:45:07,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:45:08,044 INFO L225 Difference]: With dead ends: 208812 [2020-12-22 01:45:08,045 INFO L226 Difference]: Without dead ends: 134421 [2020-12-22 01:45:08,120 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 01:45:08,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134421 states. [2020-12-22 01:45:09,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134421 to 98015. [2020-12-22 01:45:09,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98015 states. [2020-12-22 01:45:09,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98015 states to 98015 states and 107788 transitions. [2020-12-22 01:45:09,892 INFO L78 Accepts]: Start accepts. Automaton has 98015 states and 107788 transitions. Word has length 393 [2020-12-22 01:45:09,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:45:09,896 INFO L481 AbstractCegarLoop]: Abstraction has 98015 states and 107788 transitions. [2020-12-22 01:45:09,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:45:09,896 INFO L276 IsEmpty]: Start isEmpty. Operand 98015 states and 107788 transitions. [2020-12-22 01:45:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2020-12-22 01:45:09,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:45:09,910 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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] [2020-12-22 01:45:09,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 01:45:09,915 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:45:09,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:45:09,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1924313843, now seen corresponding path program 1 times [2020-12-22 01:45:09,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:45:09,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011231367] [2020-12-22 01:45:09,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:45:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:45:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 371 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 01:45:10,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011231367] [2020-12-22 01:45:10,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:45:10,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 01:45:10,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410092994] [2020-12-22 01:45:10,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 01:45:10,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:45:10,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 01:45:10,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:45:10,738 INFO L87 Difference]: Start difference. First operand 98015 states and 107788 transitions. Second operand 5 states. [2020-12-22 01:45:26,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:45:26,990 INFO L93 Difference]: Finished difference Result 195338 states and 214882 transitions. [2020-12-22 01:45:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:45:26,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 428 [2020-12-22 01:45:26,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:45:27,138 INFO L225 Difference]: With dead ends: 195338 [2020-12-22 01:45:27,138 INFO L226 Difference]: Without dead ends: 98112 [2020-12-22 01:45:27,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 01:45:27,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98112 states. [2020-12-22 01:45:28,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98112 to 98012. [2020-12-22 01:45:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98012 states. [2020-12-22 01:45:28,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98012 states to 98012 states and 105945 transitions. [2020-12-22 01:45:28,819 INFO L78 Accepts]: Start accepts. Automaton has 98012 states and 105945 transitions. Word has length 428 [2020-12-22 01:45:28,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:45:28,835 INFO L481 AbstractCegarLoop]: Abstraction has 98012 states and 105945 transitions. [2020-12-22 01:45:28,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 01:45:28,836 INFO L276 IsEmpty]: Start isEmpty. Operand 98012 states and 105945 transitions. [2020-12-22 01:45:28,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-12-22 01:45:28,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:45:28,852 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 01:45:28,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 01:45:28,852 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:45:28,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:45:28,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1181019834, now seen corresponding path program 1 times [2020-12-22 01:45:28,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:45:28,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409226684] [2020-12-22 01:45:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:45:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:45:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 214 proven. 100 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2020-12-22 01:45:29,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409226684] [2020-12-22 01:45:29,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459131194] [2020-12-22 01:45:29,699 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 01:45:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:45:29,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 01:45:29,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:45:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 692 trivial. 0 not checked. [2020-12-22 01:45:32,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:45:32,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2020-12-22 01:45:32,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187375819] [2020-12-22 01:45:32,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:45:32,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:45:32,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:45:32,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:45:32,443 INFO L87 Difference]: Start difference. First operand 98012 states and 105945 transitions. Second operand 3 states. [2020-12-22 01:45:48,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:45:48,369 INFO L93 Difference]: Finished difference Result 195229 states and 211093 transitions. [2020-12-22 01:45:48,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:45:48,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 435 [2020-12-22 01:45:48,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:45:48,532 INFO L225 Difference]: With dead ends: 195229 [2020-12-22 01:45:48,533 INFO L226 Difference]: Without dead ends: 98006 [2020-12-22 01:45:48,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 434 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 01:45:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98006 states. [2020-12-22 01:45:50,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98006 to 97213. [2020-12-22 01:45:50,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97213 states. [2020-12-22 01:45:50,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97213 states to 97213 states and 103377 transitions. [2020-12-22 01:45:50,688 INFO L78 Accepts]: Start accepts. Automaton has 97213 states and 103377 transitions. Word has length 435 [2020-12-22 01:45:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:45:50,689 INFO L481 AbstractCegarLoop]: Abstraction has 97213 states and 103377 transitions. [2020-12-22 01:45:50,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:45:50,690 INFO L276 IsEmpty]: Start isEmpty. Operand 97213 states and 103377 transitions. [2020-12-22 01:45:50,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-12-22 01:45:50,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:45:50,705 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:45:50,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 01:45:50,919 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:45:50,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:45:50,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1472115083, now seen corresponding path program 1 times [2020-12-22 01:45:50,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:45:50,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221458940] [2020-12-22 01:45:50,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:45:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:45:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 757 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2020-12-22 01:45:51,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221458940] [2020-12-22 01:45:51,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:45:51,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:45:51,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893402319] [2020-12-22 01:45:51,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:45:51,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:45:51,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:45:51,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:45:51,800 INFO L87 Difference]: Start difference. First operand 97213 states and 103377 transitions. Second operand 3 states. [2020-12-22 01:46:09,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:46:09,913 INFO L93 Difference]: Finished difference Result 195218 states and 207557 transitions. [2020-12-22 01:46:09,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:46:09,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-12-22 01:46:09,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:46:10,143 INFO L225 Difference]: With dead ends: 195218 [2020-12-22 01:46:10,143 INFO L226 Difference]: Without dead ends: 98794 [2020-12-22 01:46:10,215 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 01:46:10,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98794 states. [2020-12-22 01:46:11,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98794 to 97207. [2020-12-22 01:46:11,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97207 states. [2020-12-22 01:46:12,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97207 states to 97207 states and 102503 transitions. [2020-12-22 01:46:12,013 INFO L78 Accepts]: Start accepts. Automaton has 97207 states and 102503 transitions. Word has length 482 [2020-12-22 01:46:12,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:46:12,013 INFO L481 AbstractCegarLoop]: Abstraction has 97207 states and 102503 transitions. [2020-12-22 01:46:12,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:46:12,014 INFO L276 IsEmpty]: Start isEmpty. Operand 97207 states and 102503 transitions. [2020-12-22 01:46:12,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-12-22 01:46:12,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:46:12,028 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 01:46:12,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 01:46:12,028 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:46:12,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:46:12,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1878748943, now seen corresponding path program 1 times [2020-12-22 01:46:12,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:46:12,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419453706] [2020-12-22 01:46:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:46:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:46:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 695 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-12-22 01:46:12,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419453706] [2020-12-22 01:46:12,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:46:12,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:46:12,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181829770] [2020-12-22 01:46:12,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:46:12,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:46:12,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:46:12,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:46:12,769 INFO L87 Difference]: Start difference. First operand 97207 states and 102503 transitions. Second operand 3 states.