/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/seq-mthreaded/pals_lcr.3.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:31:48,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:31:48,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:31:48,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:31:48,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:31:48,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:31:48,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:31:48,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:31:48,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:31:48,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:31:48,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:31:48,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:31:48,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:31:48,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:31:48,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:31:48,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:31:48,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:31:48,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:31:48,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:31:48,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:31:48,519 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:31:48,549 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:31:48,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:31:48,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:31:48,552 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:31:48,552 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:31:48,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:31:48,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:31:48,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:31:48,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:31:48,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:31:48,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:31:48,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:31:48,554 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:31:48,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:31:48,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:31:48,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:31:48,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:31:48,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:31:48,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:31:48,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:31:48,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:31:48,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:31:48,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:31:48,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:31:48,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:31:48,557 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:31:48,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:31:48,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:31:48,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:31:48,987 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:31:48,988 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:31:48,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.UNBOUNDED.pals.c [2020-12-22 07:31:49,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e05e69ed8/8a92fd29b29e43cabaf001e25beccb05/FLAG07fd7b836 [2020-12-22 07:31:49,777 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:31:49,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.UNBOUNDED.pals.c [2020-12-22 07:31:49,799 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e05e69ed8/8a92fd29b29e43cabaf001e25beccb05/FLAG07fd7b836 [2020-12-22 07:31:50,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e05e69ed8/8a92fd29b29e43cabaf001e25beccb05 [2020-12-22 07:31:50,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:31:50,081 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:31:50,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:31:50,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:31:50,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:31:50,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:31:50" (1/1) ... [2020-12-22 07:31:50,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42e58f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:50, skipping insertion in model container [2020-12-22 07:31:50,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:31:50" (1/1) ... [2020-12-22 07:31:50,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:31:50,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:31:50,366 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/seq-mthreaded/pals_lcr.3.ufo.UNBOUNDED.pals.c[6043,6056] [2020-12-22 07:31:50,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:31:50,397 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:31:50,486 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/seq-mthreaded/pals_lcr.3.ufo.UNBOUNDED.pals.c[6043,6056] [2020-12-22 07:31:50,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:31:50,524 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:31:50,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:50 WrapperNode [2020-12-22 07:31:50,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:31:50,528 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:31:50,529 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:31:50,529 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:31:50,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:50" (1/1) ... [2020-12-22 07:31:50,571 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:50" (1/1) ... [2020-12-22 07:31:50,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:31:50,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:31:50,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:31:50,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:31:50,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:50" (1/1) ... [2020-12-22 07:31:50,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:50" (1/1) ... [2020-12-22 07:31:50,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:50" (1/1) ... [2020-12-22 07:31:50,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:50" (1/1) ... [2020-12-22 07:31:50,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:50" (1/1) ... [2020-12-22 07:31:50,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:50" (1/1) ... [2020-12-22 07:31:50,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:50" (1/1) ... [2020-12-22 07:31:50,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:31:50,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:31:50,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:31:50,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:31:50,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:50" (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 07:31:50,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:31:50,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:31:50,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:31:50,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:31:51,475 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:31:51,475 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:31:51,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:31:51 BoogieIcfgContainer [2020-12-22 07:31:51,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:31:51,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:31:51,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:31:51,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:31:51,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:31:50" (1/3) ... [2020-12-22 07:31:51,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74538147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:31:51, skipping insertion in model container [2020-12-22 07:31:51,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:50" (2/3) ... [2020-12-22 07:31:51,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74538147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:31:51, skipping insertion in model container [2020-12-22 07:31:51,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:31:51" (3/3) ... [2020-12-22 07:31:51,487 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c [2020-12-22 07:31:51,495 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:31:51,500 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:31:51,520 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:31:51,549 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:31:51,549 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:31:51,549 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:31:51,549 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:31:51,549 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:31:51,550 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:31:51,550 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:31:51,550 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:31:51,567 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-12-22 07:31:51,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 07:31:51,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:51,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:31:51,577 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:51,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:51,583 INFO L82 PathProgramCache]: Analyzing trace with hash -980022832, now seen corresponding path program 1 times [2020-12-22 07:31:51,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:51,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808521698] [2020-12-22 07:31:51,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:51,820 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 07:31:51,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808521698] [2020-12-22 07:31:51,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:51,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:31:51,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370425193] [2020-12-22 07:31:51,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:31:51,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:51,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:31:51,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:31:51,848 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2020-12-22 07:31:51,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:51,874 INFO L93 Difference]: Finished difference Result 101 states and 165 transitions. [2020-12-22 07:31:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:31:51,876 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2020-12-22 07:31:51,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:51,887 INFO L225 Difference]: With dead ends: 101 [2020-12-22 07:31:51,888 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 07:31:51,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:31:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 07:31:51,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-22 07:31:51,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 07:31:51,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 96 transitions. [2020-12-22 07:31:51,942 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 96 transitions. Word has length 25 [2020-12-22 07:31:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:51,942 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 96 transitions. [2020-12-22 07:31:51,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:31:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 96 transitions. [2020-12-22 07:31:51,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 07:31:51,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:51,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:31:51,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:31:51,945 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:51,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:51,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1797671282, now seen corresponding path program 1 times [2020-12-22 07:31:51,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:51,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942175176] [2020-12-22 07:31:51,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:52,074 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 07:31:52,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942175176] [2020-12-22 07:31:52,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:52,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:31:52,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885145423] [2020-12-22 07:31:52,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:31:52,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:52,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:31:52,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:52,083 INFO L87 Difference]: Start difference. First operand 59 states and 96 transitions. Second operand 5 states. [2020-12-22 07:31:52,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:52,263 INFO L93 Difference]: Finished difference Result 100 states and 158 transitions. [2020-12-22 07:31:52,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:31:52,265 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-12-22 07:31:52,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:52,267 INFO L225 Difference]: With dead ends: 100 [2020-12-22 07:31:52,267 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 07:31:52,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:31:52,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 07:31:52,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-22 07:31:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 07:31:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 80 transitions. [2020-12-22 07:31:52,286 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 80 transitions. Word has length 25 [2020-12-22 07:31:52,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:52,287 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 80 transitions. [2020-12-22 07:31:52,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:31:52,287 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 80 transitions. [2020-12-22 07:31:52,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:31:52,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:52,291 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] [2020-12-22 07:31:52,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:31:52,291 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:52,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:52,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1903157419, now seen corresponding path program 1 times [2020-12-22 07:31:52,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:52,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420674081] [2020-12-22 07:31:52,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:52,426 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 07:31:52,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420674081] [2020-12-22 07:31:52,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:52,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:31:52,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868583804] [2020-12-22 07:31:52,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:31:52,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:52,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:31:52,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:31:52,430 INFO L87 Difference]: Start difference. First operand 59 states and 80 transitions. Second operand 3 states. [2020-12-22 07:31:52,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:52,463 INFO L93 Difference]: Finished difference Result 127 states and 186 transitions. [2020-12-22 07:31:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:31:52,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-22 07:31:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:52,466 INFO L225 Difference]: With dead ends: 127 [2020-12-22 07:31:52,466 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 07:31:52,467 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 07:31:52,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 07:31:52,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-12-22 07:31:52,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 07:31:52,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 126 transitions. [2020-12-22 07:31:52,480 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 126 transitions. Word has length 40 [2020-12-22 07:31:52,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:52,480 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 126 transitions. [2020-12-22 07:31:52,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:31:52,480 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 126 transitions. [2020-12-22 07:31:52,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:31:52,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:52,482 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] [2020-12-22 07:31:52,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:31:52,483 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:52,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:52,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2054016735, now seen corresponding path program 1 times [2020-12-22 07:31:52,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:52,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565330060] [2020-12-22 07:31:52,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:52,598 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 07:31:52,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565330060] [2020-12-22 07:31:52,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:52,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:31:52,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080309990] [2020-12-22 07:31:52,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:31:52,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:52,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:31:52,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:31:52,606 INFO L87 Difference]: Start difference. First operand 88 states and 126 transitions. Second operand 3 states. [2020-12-22 07:31:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:52,664 INFO L93 Difference]: Finished difference Result 208 states and 314 transitions. [2020-12-22 07:31:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:31:52,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-22 07:31:52,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:52,675 INFO L225 Difference]: With dead ends: 208 [2020-12-22 07:31:52,675 INFO L226 Difference]: Without dead ends: 142 [2020-12-22 07:31:52,676 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 07:31:52,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-22 07:31:52,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-12-22 07:31:52,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-22 07:31:52,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 207 transitions. [2020-12-22 07:31:52,715 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 207 transitions. Word has length 40 [2020-12-22 07:31:52,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:52,716 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 207 transitions. [2020-12-22 07:31:52,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:31:52,716 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 207 transitions. [2020-12-22 07:31:52,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:31:52,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:52,718 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] [2020-12-22 07:31:52,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:31:52,719 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:52,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:52,720 INFO L82 PathProgramCache]: Analyzing trace with hash -836031337, now seen corresponding path program 1 times [2020-12-22 07:31:52,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:52,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579322405] [2020-12-22 07:31:52,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:52,855 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 07:31:52,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579322405] [2020-12-22 07:31:52,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:52,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:31:52,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729659526] [2020-12-22 07:31:52,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:31:52,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:52,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:31:52,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:52,858 INFO L87 Difference]: Start difference. First operand 140 states and 207 transitions. Second operand 5 states. [2020-12-22 07:31:53,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:53,096 INFO L93 Difference]: Finished difference Result 730 states and 1132 transitions. [2020-12-22 07:31:53,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:31:53,097 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-12-22 07:31:53,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:53,102 INFO L225 Difference]: With dead ends: 730 [2020-12-22 07:31:53,102 INFO L226 Difference]: Without dead ends: 612 [2020-12-22 07:31:53,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:31:53,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-12-22 07:31:53,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 256. [2020-12-22 07:31:53,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-12-22 07:31:53,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 383 transitions. [2020-12-22 07:31:53,145 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 383 transitions. Word has length 40 [2020-12-22 07:31:53,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:53,146 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 383 transitions. [2020-12-22 07:31:53,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:31:53,146 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 383 transitions. [2020-12-22 07:31:53,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 07:31:53,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:53,148 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] [2020-12-22 07:31:53,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:31:53,148 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:53,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:53,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1682931033, now seen corresponding path program 1 times [2020-12-22 07:31:53,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:53,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628165012] [2020-12-22 07:31:53,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:53,230 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 07:31:53,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628165012] [2020-12-22 07:31:53,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:53,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:31:53,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382300979] [2020-12-22 07:31:53,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:31:53,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:53,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:31:53,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:31:53,234 INFO L87 Difference]: Start difference. First operand 256 states and 383 transitions. Second operand 3 states. [2020-12-22 07:31:53,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:53,326 INFO L93 Difference]: Finished difference Result 680 states and 1029 transitions. [2020-12-22 07:31:53,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:31:53,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-12-22 07:31:53,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:53,331 INFO L225 Difference]: With dead ends: 680 [2020-12-22 07:31:53,331 INFO L226 Difference]: Without dead ends: 446 [2020-12-22 07:31:53,333 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 07:31:53,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-12-22 07:31:53,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 436. [2020-12-22 07:31:53,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-12-22 07:31:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 639 transitions. [2020-12-22 07:31:53,379 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 639 transitions. Word has length 42 [2020-12-22 07:31:53,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:53,380 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 639 transitions. [2020-12-22 07:31:53,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:31:53,380 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 639 transitions. [2020-12-22 07:31:53,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 07:31:53,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:53,382 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] [2020-12-22 07:31:53,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:31:53,383 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:53,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:53,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1616437521, now seen corresponding path program 1 times [2020-12-22 07:31:53,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:53,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636692673] [2020-12-22 07:31:53,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:53,604 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 07:31:53,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636692673] [2020-12-22 07:31:53,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:53,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:31:53,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735201694] [2020-12-22 07:31:53,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:31:53,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:53,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:31:53,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:53,608 INFO L87 Difference]: Start difference. First operand 436 states and 639 transitions. Second operand 5 states. [2020-12-22 07:31:53,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:53,729 INFO L93 Difference]: Finished difference Result 1058 states and 1570 transitions. [2020-12-22 07:31:53,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:31:53,730 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 07:31:53,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:53,735 INFO L225 Difference]: With dead ends: 1058 [2020-12-22 07:31:53,735 INFO L226 Difference]: Without dead ends: 644 [2020-12-22 07:31:53,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:53,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2020-12-22 07:31:53,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 436. [2020-12-22 07:31:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-12-22 07:31:53,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 631 transitions. [2020-12-22 07:31:53,773 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 631 transitions. Word has length 42 [2020-12-22 07:31:53,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:53,773 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 631 transitions. [2020-12-22 07:31:53,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:31:53,774 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 631 transitions. [2020-12-22 07:31:53,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 07:31:53,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:53,775 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] [2020-12-22 07:31:53,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:31:53,776 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:53,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:53,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1015321205, now seen corresponding path program 1 times [2020-12-22 07:31:53,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:53,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344776312] [2020-12-22 07:31:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:53,970 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 07:31:53,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344776312] [2020-12-22 07:31:53,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:53,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:31:53,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042664145] [2020-12-22 07:31:53,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:31:53,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:53,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:31:53,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:31:53,975 INFO L87 Difference]: Start difference. First operand 436 states and 631 transitions. Second operand 8 states. [2020-12-22 07:31:54,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:54,292 INFO L93 Difference]: Finished difference Result 762 states and 1095 transitions. [2020-12-22 07:31:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:31:54,293 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-12-22 07:31:54,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:54,299 INFO L225 Difference]: With dead ends: 762 [2020-12-22 07:31:54,299 INFO L226 Difference]: Without dead ends: 760 [2020-12-22 07:31:54,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:31:54,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2020-12-22 07:31:54,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 460. [2020-12-22 07:31:54,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-12-22 07:31:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 651 transitions. [2020-12-22 07:31:54,352 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 651 transitions. Word has length 43 [2020-12-22 07:31:54,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:54,353 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 651 transitions. [2020-12-22 07:31:54,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:31:54,354 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 651 transitions. [2020-12-22 07:31:54,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 07:31:54,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:54,358 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] [2020-12-22 07:31:54,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:31:54,359 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:54,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:54,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1022832678, now seen corresponding path program 1 times [2020-12-22 07:31:54,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:54,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582623987] [2020-12-22 07:31:54,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:54,435 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 07:31:54,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582623987] [2020-12-22 07:31:54,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:54,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:31:54,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890415398] [2020-12-22 07:31:54,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:31:54,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:54,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:31:54,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:31:54,444 INFO L87 Difference]: Start difference. First operand 460 states and 651 transitions. Second operand 3 states. [2020-12-22 07:31:54,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:54,512 INFO L93 Difference]: Finished difference Result 915 states and 1313 transitions. [2020-12-22 07:31:54,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:31:54,514 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-12-22 07:31:54,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:54,520 INFO L225 Difference]: With dead ends: 915 [2020-12-22 07:31:54,520 INFO L226 Difference]: Without dead ends: 656 [2020-12-22 07:31:54,521 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 07:31:54,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-12-22 07:31:54,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 654. [2020-12-22 07:31:54,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2020-12-22 07:31:54,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 921 transitions. [2020-12-22 07:31:54,579 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 921 transitions. Word has length 44 [2020-12-22 07:31:54,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:54,580 INFO L481 AbstractCegarLoop]: Abstraction has 654 states and 921 transitions. [2020-12-22 07:31:54,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:31:54,580 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 921 transitions. [2020-12-22 07:31:54,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 07:31:54,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:54,582 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:31:54,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:31:54,582 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:54,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:54,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1850444022, now seen corresponding path program 1 times [2020-12-22 07:31:54,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:54,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116193922] [2020-12-22 07:31:54,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 07:31:54,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116193922] [2020-12-22 07:31:54,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:54,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:31:54,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457478249] [2020-12-22 07:31:54,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:31:54,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:54,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:31:54,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:54,664 INFO L87 Difference]: Start difference. First operand 654 states and 921 transitions. Second operand 5 states. [2020-12-22 07:31:54,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:54,940 INFO L93 Difference]: Finished difference Result 2682 states and 3797 transitions. [2020-12-22 07:31:54,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:31:54,941 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 07:31:54,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:54,959 INFO L225 Difference]: With dead ends: 2682 [2020-12-22 07:31:54,959 INFO L226 Difference]: Without dead ends: 2052 [2020-12-22 07:31:54,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:31:54,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2020-12-22 07:31:55,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1282. [2020-12-22 07:31:55,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1282 states. [2020-12-22 07:31:55,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1805 transitions. [2020-12-22 07:31:55,077 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1805 transitions. Word has length 62 [2020-12-22 07:31:55,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:55,078 INFO L481 AbstractCegarLoop]: Abstraction has 1282 states and 1805 transitions. [2020-12-22 07:31:55,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:31:55,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1805 transitions. [2020-12-22 07:31:55,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 07:31:55,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:55,080 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:31:55,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:31:55,081 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:55,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:55,081 INFO L82 PathProgramCache]: Analyzing trace with hash 675740458, now seen corresponding path program 1 times [2020-12-22 07:31:55,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:55,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480345901] [2020-12-22 07:31:55,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 07:31:55,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480345901] [2020-12-22 07:31:55,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:55,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:31:55,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29216625] [2020-12-22 07:31:55,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:31:55,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:55,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:31:55,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:55,212 INFO L87 Difference]: Start difference. First operand 1282 states and 1805 transitions. Second operand 5 states. [2020-12-22 07:31:55,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:55,525 INFO L93 Difference]: Finished difference Result 3310 states and 4681 transitions. [2020-12-22 07:31:55,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:31:55,526 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-22 07:31:55,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:55,540 INFO L225 Difference]: With dead ends: 3310 [2020-12-22 07:31:55,540 INFO L226 Difference]: Without dead ends: 2680 [2020-12-22 07:31:55,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:55,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2020-12-22 07:31:55,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2226. [2020-12-22 07:31:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2226 states. [2020-12-22 07:31:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 3121 transitions. [2020-12-22 07:31:55,722 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 3121 transitions. Word has length 62 [2020-12-22 07:31:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:55,723 INFO L481 AbstractCegarLoop]: Abstraction has 2226 states and 3121 transitions. [2020-12-22 07:31:55,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:31:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 3121 transitions. [2020-12-22 07:31:55,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 07:31:55,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:55,725 INFO L422 BasicCegarLoop]: trace histogram [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 07:31:55,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:31:55,725 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:55,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:55,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1509451614, now seen corresponding path program 1 times [2020-12-22 07:31:55,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:55,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813978226] [2020-12-22 07:31:55,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:55,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813978226] [2020-12-22 07:31:55,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:55,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:31:55,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216700462] [2020-12-22 07:31:55,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:31:55,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:55,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:31:55,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:31:55,798 INFO L87 Difference]: Start difference. First operand 2226 states and 3121 transitions. Second operand 3 states. [2020-12-22 07:31:55,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:55,956 INFO L93 Difference]: Finished difference Result 3819 states and 5388 transitions. [2020-12-22 07:31:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:31:55,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 07:31:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:55,965 INFO L225 Difference]: With dead ends: 3819 [2020-12-22 07:31:55,966 INFO L226 Difference]: Without dead ends: 1617 [2020-12-22 07:31:55,969 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 07:31:55,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2020-12-22 07:31:56,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1615. [2020-12-22 07:31:56,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1615 states. [2020-12-22 07:31:56,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 2261 transitions. [2020-12-22 07:31:56,100 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 2261 transitions. Word has length 64 [2020-12-22 07:31:56,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:56,100 INFO L481 AbstractCegarLoop]: Abstraction has 1615 states and 2261 transitions. [2020-12-22 07:31:56,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:31:56,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 2261 transitions. [2020-12-22 07:31:56,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 07:31:56,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:56,102 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:31:56,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:31:56,102 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:56,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:56,103 INFO L82 PathProgramCache]: Analyzing trace with hash -533719953, now seen corresponding path program 1 times [2020-12-22 07:31:56,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:56,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891772788] [2020-12-22 07:31:56,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:31:56,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891772788] [2020-12-22 07:31:56,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:56,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:31:56,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810536759] [2020-12-22 07:31:56,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:31:56,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:56,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:31:56,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:56,220 INFO L87 Difference]: Start difference. First operand 1615 states and 2261 transitions. Second operand 5 states. [2020-12-22 07:31:56,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:56,478 INFO L93 Difference]: Finished difference Result 2967 states and 4185 transitions. [2020-12-22 07:31:56,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:31:56,479 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 07:31:56,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:56,491 INFO L225 Difference]: With dead ends: 2967 [2020-12-22 07:31:56,491 INFO L226 Difference]: Without dead ends: 2517 [2020-12-22 07:31:56,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:56,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2020-12-22 07:31:56,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 2063. [2020-12-22 07:31:56,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2063 states. [2020-12-22 07:31:56,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 2893 transitions. [2020-12-22 07:31:56,667 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 2893 transitions. Word has length 64 [2020-12-22 07:31:56,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:56,667 INFO L481 AbstractCegarLoop]: Abstraction has 2063 states and 2893 transitions. [2020-12-22 07:31:56,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:31:56,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 2893 transitions. [2020-12-22 07:31:56,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:31:56,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:56,669 INFO L422 BasicCegarLoop]: trace histogram [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 07:31:56,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:31:56,669 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:56,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:56,670 INFO L82 PathProgramCache]: Analyzing trace with hash 453585990, now seen corresponding path program 1 times [2020-12-22 07:31:56,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:56,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192524909] [2020-12-22 07:31:56,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:56,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192524909] [2020-12-22 07:31:56,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098516059] [2020-12-22 07:31:56,957 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 07:31:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:57,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 07:31:57,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:31:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:31:57,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:31:57,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 07:31:57,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455720055] [2020-12-22 07:31:57,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 07:31:57,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:57,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 07:31:57,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:31:57,512 INFO L87 Difference]: Start difference. First operand 2063 states and 2893 transitions. Second operand 12 states. [2020-12-22 07:32:00,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:00,436 INFO L93 Difference]: Finished difference Result 11357 states and 15649 transitions. [2020-12-22 07:32:00,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 07:32:00,436 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-12-22 07:32:00,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:00,482 INFO L225 Difference]: With dead ends: 11357 [2020-12-22 07:32:00,482 INFO L226 Difference]: Without dead ends: 9339 [2020-12-22 07:32:00,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=399, Invalid=1581, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 07:32:00,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9339 states. [2020-12-22 07:32:01,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9339 to 6075. [2020-12-22 07:32:01,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6075 states. [2020-12-22 07:32:01,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6075 states to 6075 states and 8170 transitions. [2020-12-22 07:32:01,165 INFO L78 Accepts]: Start accepts. Automaton has 6075 states and 8170 transitions. Word has length 65 [2020-12-22 07:32:01,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:01,166 INFO L481 AbstractCegarLoop]: Abstraction has 6075 states and 8170 transitions. [2020-12-22 07:32:01,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 07:32:01,166 INFO L276 IsEmpty]: Start isEmpty. Operand 6075 states and 8170 transitions. [2020-12-22 07:32:01,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:32:01,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:01,167 INFO L422 BasicCegarLoop]: trace histogram [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 07:32:01,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 07:32:01,381 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:01,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:01,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1141993671, now seen corresponding path program 1 times [2020-12-22 07:32:01,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:01,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327786145] [2020-12-22 07:32:01,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:01,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327786145] [2020-12-22 07:32:01,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627449575] [2020-12-22 07:32:01,594 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 07:32:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:01,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 07:32:01,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:32:01,898 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:32:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:02,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:32:02,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 07:32:02,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914409177] [2020-12-22 07:32:02,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:32:02,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:02,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:32:02,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:32:02,170 INFO L87 Difference]: Start difference. First operand 6075 states and 8170 transitions. Second operand 17 states. [2020-12-22 07:32:05,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:05,367 INFO L93 Difference]: Finished difference Result 29946 states and 40228 transitions. [2020-12-22 07:32:05,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 07:32:05,368 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 07:32:05,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:05,455 INFO L225 Difference]: With dead ends: 29946 [2020-12-22 07:32:05,455 INFO L226 Difference]: Without dead ends: 25035 [2020-12-22 07:32:05,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 07:32:05,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25035 states. [2020-12-22 07:32:07,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25035 to 13748. [2020-12-22 07:32:07,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13748 states. [2020-12-22 07:32:07,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13748 states to 13748 states and 18456 transitions. [2020-12-22 07:32:07,164 INFO L78 Accepts]: Start accepts. Automaton has 13748 states and 18456 transitions. Word has length 66 [2020-12-22 07:32:07,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:07,165 INFO L481 AbstractCegarLoop]: Abstraction has 13748 states and 18456 transitions. [2020-12-22 07:32:07,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:32:07,165 INFO L276 IsEmpty]: Start isEmpty. Operand 13748 states and 18456 transitions. [2020-12-22 07:32:07,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:32:07,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:07,167 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:32:07,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 07:32:07,382 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:07,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:07,383 INFO L82 PathProgramCache]: Analyzing trace with hash -879979399, now seen corresponding path program 1 times [2020-12-22 07:32:07,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:07,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481130595] [2020-12-22 07:32:07,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:07,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481130595] [2020-12-22 07:32:07,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925676703] [2020-12-22 07:32:07,648 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 07:32:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:07,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 07:32:07,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:32:07,954 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:32:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:08,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:32:08,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 07:32:08,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586203599] [2020-12-22 07:32:08,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:32:08,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:08,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:32:08,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:32:08,314 INFO L87 Difference]: Start difference. First operand 13748 states and 18456 transitions. Second operand 17 states. [2020-12-22 07:32:15,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:15,190 INFO L93 Difference]: Finished difference Result 75187 states and 101112 transitions. [2020-12-22 07:32:15,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 07:32:15,191 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 07:32:15,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:15,352 INFO L225 Difference]: With dead ends: 75187 [2020-12-22 07:32:15,352 INFO L226 Difference]: Without dead ends: 63757 [2020-12-22 07:32:15,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=596, Invalid=1660, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 07:32:15,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63757 states. [2020-12-22 07:32:18,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63757 to 31799. [2020-12-22 07:32:18,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31799 states. [2020-12-22 07:32:19,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31799 states to 31799 states and 42724 transitions. [2020-12-22 07:32:19,011 INFO L78 Accepts]: Start accepts. Automaton has 31799 states and 42724 transitions. Word has length 66 [2020-12-22 07:32:19,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:19,012 INFO L481 AbstractCegarLoop]: Abstraction has 31799 states and 42724 transitions. [2020-12-22 07:32:19,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:32:19,012 INFO L276 IsEmpty]: Start isEmpty. Operand 31799 states and 42724 transitions. [2020-12-22 07:32:19,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:32:19,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:19,014 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:32:19,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 07:32:19,216 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:19,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:19,217 INFO L82 PathProgramCache]: Analyzing trace with hash 338005999, now seen corresponding path program 1 times [2020-12-22 07:32:19,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:19,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443665217] [2020-12-22 07:32:19,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:19,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443665217] [2020-12-22 07:32:19,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:19,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:19,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093909645] [2020-12-22 07:32:19,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:19,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:19,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:19,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:19,265 INFO L87 Difference]: Start difference. First operand 31799 states and 42724 transitions. Second operand 3 states. [2020-12-22 07:32:20,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:20,983 INFO L93 Difference]: Finished difference Result 47017 states and 63333 transitions. [2020-12-22 07:32:20,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:20,983 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 07:32:20,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:21,019 INFO L225 Difference]: With dead ends: 47017 [2020-12-22 07:32:21,019 INFO L226 Difference]: Without dead ends: 18505 [2020-12-22 07:32:21,052 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 07:32:21,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18505 states. [2020-12-22 07:32:22,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18505 to 18269. [2020-12-22 07:32:22,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18269 states. [2020-12-22 07:32:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18269 states to 18269 states and 23886 transitions. [2020-12-22 07:32:22,883 INFO L78 Accepts]: Start accepts. Automaton has 18269 states and 23886 transitions. Word has length 66 [2020-12-22 07:32:22,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:22,883 INFO L481 AbstractCegarLoop]: Abstraction has 18269 states and 23886 transitions. [2020-12-22 07:32:22,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:22,884 INFO L276 IsEmpty]: Start isEmpty. Operand 18269 states and 23886 transitions. [2020-12-22 07:32:22,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:32:22,886 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:22,886 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:32:22,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:32:22,886 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:22,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:22,887 INFO L82 PathProgramCache]: Analyzing trace with hash -909501617, now seen corresponding path program 1 times [2020-12-22 07:32:22,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:22,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543333111] [2020-12-22 07:32:22,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:22,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543333111] [2020-12-22 07:32:22,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:22,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:22,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991789457] [2020-12-22 07:32:22,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:22,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:22,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:22,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:22,930 INFO L87 Difference]: Start difference. First operand 18269 states and 23886 transitions. Second operand 3 states. [2020-12-22 07:32:24,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:24,355 INFO L93 Difference]: Finished difference Result 28171 states and 37017 transitions. [2020-12-22 07:32:24,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:24,356 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 07:32:24,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:24,372 INFO L225 Difference]: With dead ends: 28171 [2020-12-22 07:32:24,372 INFO L226 Difference]: Without dead ends: 12159 [2020-12-22 07:32:24,388 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 07:32:24,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12159 states. [2020-12-22 07:32:25,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12159 to 12157. [2020-12-22 07:32:25,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12157 states. [2020-12-22 07:32:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12157 states to 12157 states and 15509 transitions. [2020-12-22 07:32:25,474 INFO L78 Accepts]: Start accepts. Automaton has 12157 states and 15509 transitions. Word has length 66 [2020-12-22 07:32:25,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:25,475 INFO L481 AbstractCegarLoop]: Abstraction has 12157 states and 15509 transitions. [2020-12-22 07:32:25,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 12157 states and 15509 transitions. [2020-12-22 07:32:25,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:32:25,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:25,477 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:32:25,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:32:25,477 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:25,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:25,478 INFO L82 PathProgramCache]: Analyzing trace with hash 2060627063, now seen corresponding path program 1 times [2020-12-22 07:32:25,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:25,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927129408] [2020-12-22 07:32:25,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 07:32:25,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927129408] [2020-12-22 07:32:25,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:25,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:32:25,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653735030] [2020-12-22 07:32:25,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:25,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:25,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:25,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:25,549 INFO L87 Difference]: Start difference. First operand 12157 states and 15509 transitions. Second operand 6 states. [2020-12-22 07:32:26,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:26,658 INFO L93 Difference]: Finished difference Result 21920 states and 28061 transitions. [2020-12-22 07:32:26,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:26,659 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 07:32:26,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:26,669 INFO L225 Difference]: With dead ends: 21920 [2020-12-22 07:32:26,669 INFO L226 Difference]: Without dead ends: 9868 [2020-12-22 07:32:26,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:32:26,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9868 states. [2020-12-22 07:32:27,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9868 to 9868. [2020-12-22 07:32:27,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9868 states. [2020-12-22 07:32:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9868 states to 9868 states and 12390 transitions. [2020-12-22 07:32:27,589 INFO L78 Accepts]: Start accepts. Automaton has 9868 states and 12390 transitions. Word has length 66 [2020-12-22 07:32:27,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:27,590 INFO L481 AbstractCegarLoop]: Abstraction has 9868 states and 12390 transitions. [2020-12-22 07:32:27,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:27,590 INFO L276 IsEmpty]: Start isEmpty. Operand 9868 states and 12390 transitions. [2020-12-22 07:32:27,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:32:27,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:27,592 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:32:27,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:32:27,592 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:27,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:27,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1909338697, now seen corresponding path program 1 times [2020-12-22 07:32:27,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:27,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127168285] [2020-12-22 07:32:27,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:32:27,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127168285] [2020-12-22 07:32:27,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:27,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:27,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403896304] [2020-12-22 07:32:27,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:32:27,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:27,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:32:27,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:32:27,698 INFO L87 Difference]: Start difference. First operand 9868 states and 12390 transitions. Second operand 7 states. [2020-12-22 07:32:28,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:28,931 INFO L93 Difference]: Finished difference Result 20078 states and 25368 transitions. [2020-12-22 07:32:28,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:28,932 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 07:32:28,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:28,942 INFO L225 Difference]: With dead ends: 20078 [2020-12-22 07:32:28,942 INFO L226 Difference]: Without dead ends: 10349 [2020-12-22 07:32:28,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:32:28,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10349 states. [2020-12-22 07:32:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10349 to 10347. [2020-12-22 07:32:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10347 states. [2020-12-22 07:32:29,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10347 states to 10347 states and 12980 transitions. [2020-12-22 07:32:29,789 INFO L78 Accepts]: Start accepts. Automaton has 10347 states and 12980 transitions. Word has length 66 [2020-12-22 07:32:29,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:29,789 INFO L481 AbstractCegarLoop]: Abstraction has 10347 states and 12980 transitions. [2020-12-22 07:32:29,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:32:29,789 INFO L276 IsEmpty]: Start isEmpty. Operand 10347 states and 12980 transitions. [2020-12-22 07:32:29,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:32:29,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:29,791 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:32:29,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:32:29,791 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:29,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:29,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1136949911, now seen corresponding path program 1 times [2020-12-22 07:32:29,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:29,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674864691] [2020-12-22 07:32:29,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 07:32:29,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674864691] [2020-12-22 07:32:29,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:29,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:32:29,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088326386] [2020-12-22 07:32:29,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:29,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:29,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:29,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:29,849 INFO L87 Difference]: Start difference. First operand 10347 states and 12980 transitions. Second operand 6 states. [2020-12-22 07:32:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:30,601 INFO L93 Difference]: Finished difference Result 18204 states and 22941 transitions. [2020-12-22 07:32:30,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:30,602 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 07:32:30,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:30,610 INFO L225 Difference]: With dead ends: 18204 [2020-12-22 07:32:30,610 INFO L226 Difference]: Without dead ends: 7918 [2020-12-22 07:32:30,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:32:30,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7918 states. [2020-12-22 07:32:31,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7918 to 7918. [2020-12-22 07:32:31,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7918 states. [2020-12-22 07:32:31,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7918 states to 7918 states and 9876 transitions. [2020-12-22 07:32:31,265 INFO L78 Accepts]: Start accepts. Automaton has 7918 states and 9876 transitions. Word has length 66 [2020-12-22 07:32:31,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:31,265 INFO L481 AbstractCegarLoop]: Abstraction has 7918 states and 9876 transitions. [2020-12-22 07:32:31,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:31,266 INFO L276 IsEmpty]: Start isEmpty. Operand 7918 states and 9876 transitions. [2020-12-22 07:32:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:32:31,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:31,267 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:32:31,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:32:31,267 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:31,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:31,267 INFO L82 PathProgramCache]: Analyzing trace with hash 72303667, now seen corresponding path program 1 times [2020-12-22 07:32:31,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:31,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166083912] [2020-12-22 07:32:31,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:32,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166083912] [2020-12-22 07:32:32,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028127939] [2020-12-22 07:32:32,102 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 07:32:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:32,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 07:32:32,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:32:32,589 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 07:32:32,951 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-12-22 07:32:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:33,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:32:33,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2020-12-22 07:32:33,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567635393] [2020-12-22 07:32:33,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 07:32:33,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:33,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 07:32:33,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 07:32:33,552 INFO L87 Difference]: Start difference. First operand 7918 states and 9876 transitions. Second operand 33 states. [2020-12-22 07:32:33,837 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-12-22 07:32:34,852 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-12-22 07:32:35,054 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-12-22 07:32:35,307 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-12-22 07:32:35,720 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-12-22 07:32:36,213 WARN L197 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 104 [2020-12-22 07:32:36,718 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 101 [2020-12-22 07:32:37,050 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-12-22 07:32:37,416 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-12-22 07:32:37,768 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-12-22 07:32:38,121 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-12-22 07:32:38,460 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-12-22 07:32:38,931 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-12-22 07:32:39,234 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2020-12-22 07:32:39,482 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-22 07:32:40,018 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-12-22 07:32:40,222 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-12-22 07:32:40,454 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-22 07:32:40,939 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-12-22 07:32:41,422 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-12-22 07:32:41,895 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-12-22 07:32:42,247 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-12-22 07:32:42,538 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-12-22 07:32:42,973 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-12-22 07:32:43,353 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-12-22 07:32:43,639 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-22 07:32:43,845 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-12-22 07:32:44,454 WARN L197 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 112 [2020-12-22 07:32:44,863 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-12-22 07:32:45,148 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-12-22 07:32:47,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:47,556 INFO L93 Difference]: Finished difference Result 25527 states and 32803 transitions. [2020-12-22 07:32:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 07:32:47,557 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 67 [2020-12-22 07:32:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:47,582 INFO L225 Difference]: With dead ends: 25527 [2020-12-22 07:32:47,582 INFO L226 Difference]: Without dead ends: 21784 [2020-12-22 07:32:47,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=939, Invalid=4611, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 07:32:47,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21784 states. [2020-12-22 07:32:48,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21784 to 7010. [2020-12-22 07:32:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7010 states. [2020-12-22 07:32:48,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7010 states to 7010 states and 8799 transitions. [2020-12-22 07:32:48,562 INFO L78 Accepts]: Start accepts. Automaton has 7010 states and 8799 transitions. Word has length 67 [2020-12-22 07:32:48,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:48,562 INFO L481 AbstractCegarLoop]: Abstraction has 7010 states and 8799 transitions. [2020-12-22 07:32:48,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 07:32:48,562 INFO L276 IsEmpty]: Start isEmpty. Operand 7010 states and 8799 transitions. [2020-12-22 07:32:48,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:32:48,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:48,563 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:32:48,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:32:48,769 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:48,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:48,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1790008711, now seen corresponding path program 1 times [2020-12-22 07:32:48,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:48,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997536864] [2020-12-22 07:32:48,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:49,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997536864] [2020-12-22 07:32:49,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984583089] [2020-12-22 07:32:49,861 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 07:32:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:49,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 07:32:49,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:32:50,372 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 07:32:50,730 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 34 [2020-12-22 07:32:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:51,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:32:51,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2020-12-22 07:32:51,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034289822] [2020-12-22 07:32:51,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 07:32:51,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:51,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 07:32:51,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 07:32:51,327 INFO L87 Difference]: Start difference. First operand 7010 states and 8799 transitions. Second operand 33 states. [2020-12-22 07:32:51,690 WARN L197 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-12-22 07:32:52,593 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-12-22 07:32:52,984 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-12-22 07:32:53,597 WARN L197 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2020-12-22 07:32:54,147 WARN L197 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2020-12-22 07:32:54,801 WARN L197 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-12-22 07:32:55,579 WARN L197 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2020-12-22 07:32:55,943 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-12-22 07:32:56,315 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-12-22 07:32:56,621 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-12-22 07:32:56,969 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-12-22 07:32:57,344 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2020-12-22 07:32:57,612 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-22 07:32:57,979 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-12-22 07:32:58,223 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-12-22 07:32:58,454 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 07:32:59,085 WARN L197 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-12-22 07:32:59,304 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-22 07:32:59,497 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-22 07:32:59,798 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-22 07:33:00,049 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 07:33:00,653 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 07:33:00,858 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 07:33:01,578 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-12-22 07:33:01,792 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 07:33:02,009 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-22 07:33:02,713 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-12-22 07:33:03,159 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-12-22 07:33:03,531 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-12-22 07:33:04,039 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-22 07:33:04,489 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-22 07:33:04,753 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-12-22 07:33:05,557 WARN L197 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-12-22 07:33:05,732 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-22 07:33:06,387 WARN L197 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-22 07:33:07,214 WARN L197 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-12-22 07:33:07,824 WARN L197 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-12-22 07:33:08,097 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-22 07:33:08,334 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-12-22 07:33:08,635 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-22 07:33:08,986 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-12-22 07:33:09,540 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-12-22 07:33:10,579 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-22 07:33:10,783 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 07:33:11,000 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-12-22 07:33:11,326 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-22 07:33:11,736 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 07:33:12,186 WARN L197 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-12-22 07:33:12,506 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-12-22 07:33:13,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:13,416 INFO L93 Difference]: Finished difference Result 16476 states and 20829 transitions. [2020-12-22 07:33:13,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-22 07:33:13,417 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 67 [2020-12-22 07:33:13,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:13,432 INFO L225 Difference]: With dead ends: 16476 [2020-12-22 07:33:13,432 INFO L226 Difference]: Without dead ends: 12721 [2020-12-22 07:33:13,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=1646, Invalid=7474, Unknown=0, NotChecked=0, Total=9120 [2020-12-22 07:33:13,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12721 states. [2020-12-22 07:33:14,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12721 to 5665. [2020-12-22 07:33:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5665 states. [2020-12-22 07:33:14,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5665 states to 5665 states and 7139 transitions. [2020-12-22 07:33:14,215 INFO L78 Accepts]: Start accepts. Automaton has 5665 states and 7139 transitions. Word has length 67 [2020-12-22 07:33:14,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:14,215 INFO L481 AbstractCegarLoop]: Abstraction has 5665 states and 7139 transitions. [2020-12-22 07:33:14,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 07:33:14,215 INFO L276 IsEmpty]: Start isEmpty. Operand 5665 states and 7139 transitions. [2020-12-22 07:33:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:33:14,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:14,216 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 07:33:14,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 07:33:14,417 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:14,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:14,418 INFO L82 PathProgramCache]: Analyzing trace with hash -316809972, now seen corresponding path program 1 times [2020-12-22 07:33:14,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:14,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117614595] [2020-12-22 07:33:14,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:15,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117614595] [2020-12-22 07:33:15,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331367927] [2020-12-22 07:33:15,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:33:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:15,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 07:33:15,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:33:15,608 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 07:33:15,931 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 31 [2020-12-22 07:33:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:16,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:33:16,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2020-12-22 07:33:16,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222583855] [2020-12-22 07:33:16,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 07:33:16,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:16,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 07:33:16,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-12-22 07:33:16,429 INFO L87 Difference]: Start difference. First operand 5665 states and 7139 transitions. Second operand 23 states. [2020-12-22 07:33:17,050 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 25 [2020-12-22 07:33:17,316 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-12-22 07:33:17,609 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-12-22 07:33:17,875 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-12-22 07:33:18,065 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-12-22 07:33:18,296 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-12-22 07:33:19,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:19,371 INFO L93 Difference]: Finished difference Result 8263 states and 10528 transitions. [2020-12-22 07:33:19,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 07:33:19,372 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-12-22 07:33:19,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:19,377 INFO L225 Difference]: With dead ends: 8263 [2020-12-22 07:33:19,377 INFO L226 Difference]: Without dead ends: 5375 [2020-12-22 07:33:19,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 07:33:19,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5375 states. [2020-12-22 07:33:19,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5375 to 4331. [2020-12-22 07:33:19,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4331 states. [2020-12-22 07:33:19,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 5459 transitions. [2020-12-22 07:33:19,951 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 5459 transitions. Word has length 69 [2020-12-22 07:33:19,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:19,951 INFO L481 AbstractCegarLoop]: Abstraction has 4331 states and 5459 transitions. [2020-12-22 07:33:19,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 07:33:19,951 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 5459 transitions. [2020-12-22 07:33:19,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 07:33:19,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:19,954 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2020-12-22 07:33:20,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:33:20,161 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:20,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:20,162 INFO L82 PathProgramCache]: Analyzing trace with hash 805682706, now seen corresponding path program 1 times [2020-12-22 07:33:20,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:20,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727315491] [2020-12-22 07:33:20,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:20,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727315491] [2020-12-22 07:33:20,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313033303] [2020-12-22 07:33:20,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:33:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:20,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 07:33:20,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:33:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 12 proven. 67 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 07:33:21,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:33:21,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 17 [2020-12-22 07:33:21,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033150588] [2020-12-22 07:33:21,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:33:21,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:21,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:33:21,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:33:21,098 INFO L87 Difference]: Start difference. First operand 4331 states and 5459 transitions. Second operand 17 states. [2020-12-22 07:33:22,025 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-12-22 07:33:22,210 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 07:33:22,393 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 07:33:22,619 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 07:33:22,781 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 07:33:23,172 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-12-22 07:33:23,354 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-12-22 07:33:23,529 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 07:33:23,778 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 07:33:24,053 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 07:33:24,226 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 07:33:24,460 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 07:33:24,644 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 07:33:24,874 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 07:33:25,400 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-12-22 07:33:25,609 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-12-22 07:33:25,803 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 07:33:26,312 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 07:33:26,699 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 07:33:26,832 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 07:33:27,341 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-12-22 07:33:27,514 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 07:33:27,682 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 07:33:28,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:28,074 INFO L93 Difference]: Finished difference Result 10650 states and 13420 transitions. [2020-12-22 07:33:28,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 07:33:28,075 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 110 [2020-12-22 07:33:28,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:28,081 INFO L225 Difference]: With dead ends: 10650 [2020-12-22 07:33:28,081 INFO L226 Difference]: Without dead ends: 6724 [2020-12-22 07:33:28,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=445, Invalid=1907, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 07:33:28,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6724 states. [2020-12-22 07:33:29,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6724 to 6644. [2020-12-22 07:33:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6644 states. [2020-12-22 07:33:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6644 states to 6644 states and 8004 transitions. [2020-12-22 07:33:29,112 INFO L78 Accepts]: Start accepts. Automaton has 6644 states and 8004 transitions. Word has length 110 [2020-12-22 07:33:29,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:29,112 INFO L481 AbstractCegarLoop]: Abstraction has 6644 states and 8004 transitions. [2020-12-22 07:33:29,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:33:29,112 INFO L276 IsEmpty]: Start isEmpty. Operand 6644 states and 8004 transitions. [2020-12-22 07:33:29,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:33:29,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:29,115 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2020-12-22 07:33:29,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 07:33:29,328 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:29,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:29,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1445084205, now seen corresponding path program 1 times [2020-12-22 07:33:29,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:29,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970747620] [2020-12-22 07:33:29,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:29,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970747620] [2020-12-22 07:33:29,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198619646] [2020-12-22 07:33:29,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:33:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:29,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 07:33:29,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:33:30,592 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 07:33:30,756 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:33:31,118 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:33:31,990 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:33:33,218 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:33:34,937 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:33:38,588 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:33:38,630 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:33:40,607 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:34:01,690 WARN L197 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 458 DAG size of output: 398 [2020-12-22 07:34:30,127 WARN L197 SmtUtils]: Spent 2.86 s on a formula simplification that was a NOOP. DAG size: 398