/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_floodmax.3_overflow.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:20:37,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:20:37,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:20:37,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:20:37,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:20:37,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:20:37,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:20:37,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:20:37,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:20:37,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:20:37,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:20:37,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:20:37,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:20:37,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:20:37,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:20:37,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:20:37,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:20:37,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:20:37,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:20:37,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:20:37,792 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:20:37,821 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:20:37,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:20:37,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:20:37,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:20:37,824 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:20:37,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:20:37,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:20:37,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:20:37,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:20:37,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:20:37,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:20:37,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:20:37,826 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:20:37,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:20:37,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:20:37,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:20:37,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:20:37,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:20:37,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:20:37,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:20:37,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:20:37,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:20:37,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:20:37,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:20:37,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:20:37,830 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:20:38,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:20:38,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:20:38,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:20:38,286 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:20:38,286 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:20:38,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:20:38,383 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b4abf049/5288efa4713d421d9ad464508617e6e6/FLAG7f44e7768 [2020-12-22 07:20:39,093 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:20:39,094 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:20:39,113 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b4abf049/5288efa4713d421d9ad464508617e6e6/FLAG7f44e7768 [2020-12-22 07:20:39,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b4abf049/5288efa4713d421d9ad464508617e6e6 [2020-12-22 07:20:39,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:20:39,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:20:39,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:20:39,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:20:39,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:20:39,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:39" (1/1) ... [2020-12-22 07:20:39,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5882fc80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:39, skipping insertion in model container [2020-12-22 07:20:39,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:20:39" (1/1) ... [2020-12-22 07:20:39,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:20:39,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:20:39,745 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_floodmax.3_overflow.ufo.UNBOUNDED.pals.c[12924,12937] [2020-12-22 07:20:39,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:20:39,773 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:20:39,841 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_floodmax.3_overflow.ufo.UNBOUNDED.pals.c[12924,12937] [2020-12-22 07:20:39,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:20:39,870 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:20:39,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:39 WrapperNode [2020-12-22 07:20:39,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:20:39,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:20:39,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:20:39,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:20:39,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:39" (1/1) ... [2020-12-22 07:20:39,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:39" (1/1) ... [2020-12-22 07:20:40,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:20:40,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:20:40,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:20:40,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:20:40,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:39" (1/1) ... [2020-12-22 07:20:40,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:39" (1/1) ... [2020-12-22 07:20:40,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:39" (1/1) ... [2020-12-22 07:20:40,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:39" (1/1) ... [2020-12-22 07:20:40,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:39" (1/1) ... [2020-12-22 07:20:40,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:39" (1/1) ... [2020-12-22 07:20:40,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:39" (1/1) ... [2020-12-22 07:20:40,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:20:40,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:20:40,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:20:40,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:20:40,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:39" (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 07:20:40,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:20:40,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:20:40,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:20:40,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:20:41,418 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:20:41,419 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:20:41,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:20:41 BoogieIcfgContainer [2020-12-22 07:20:41,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:20:41,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:20:41,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:20:41,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:20:41,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:20:39" (1/3) ... [2020-12-22 07:20:41,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7298c045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:20:41, skipping insertion in model container [2020-12-22 07:20:41,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:20:39" (2/3) ... [2020-12-22 07:20:41,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7298c045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:20:41, skipping insertion in model container [2020-12-22 07:20:41,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:20:41" (3/3) ... [2020-12-22 07:20:41,440 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3_overflow.ufo.UNBOUNDED.pals.c [2020-12-22 07:20:41,448 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:20:41,455 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:20:41,479 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:20:41,518 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:20:41,519 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:20:41,519 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:20:41,519 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:20:41,519 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:20:41,520 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:20:41,520 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:20:41,520 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:20:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states. [2020-12-22 07:20:41,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:20:41,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:41,563 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] [2020-12-22 07:20:41,563 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:41,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:41,574 INFO L82 PathProgramCache]: Analyzing trace with hash -306716250, now seen corresponding path program 1 times [2020-12-22 07:20:41,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:41,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598863849] [2020-12-22 07:20:41,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:41,936 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 07:20:41,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598863849] [2020-12-22 07:20:41,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:41,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:20:41,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144046914] [2020-12-22 07:20:41,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:20:41,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:41,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:20:41,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:20:41,966 INFO L87 Difference]: Start difference. First operand 130 states. Second operand 2 states. [2020-12-22 07:20:42,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:42,005 INFO L93 Difference]: Finished difference Result 200 states and 347 transitions. [2020-12-22 07:20:42,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:20:42,010 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:20:42,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:42,024 INFO L225 Difference]: With dead ends: 200 [2020-12-22 07:20:42,024 INFO L226 Difference]: Without dead ends: 126 [2020-12-22 07:20:42,028 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 07:20:42,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-22 07:20:42,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-12-22 07:20:42,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-22 07:20:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 219 transitions. [2020-12-22 07:20:42,090 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 219 transitions. Word has length 37 [2020-12-22 07:20:42,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:42,091 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 219 transitions. [2020-12-22 07:20:42,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:20:42,091 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 219 transitions. [2020-12-22 07:20:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:20:42,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:42,094 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] [2020-12-22 07:20:42,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:20:42,094 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:42,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1124364700, now seen corresponding path program 1 times [2020-12-22 07:20:42,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:42,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498010764] [2020-12-22 07:20:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:42,300 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 07:20:42,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498010764] [2020-12-22 07:20:42,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:42,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:20:42,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999486108] [2020-12-22 07:20:42,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:20:42,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:42,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:20:42,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:42,308 INFO L87 Difference]: Start difference. First operand 126 states and 219 transitions. Second operand 5 states. [2020-12-22 07:20:42,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:42,466 INFO L93 Difference]: Finished difference Result 199 states and 340 transitions. [2020-12-22 07:20:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:20:42,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:20:42,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:42,469 INFO L225 Difference]: With dead ends: 199 [2020-12-22 07:20:42,469 INFO L226 Difference]: Without dead ends: 126 [2020-12-22 07:20:42,471 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 07:20:42,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-22 07:20:42,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-12-22 07:20:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-22 07:20:42,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 192 transitions. [2020-12-22 07:20:42,484 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 192 transitions. Word has length 37 [2020-12-22 07:20:42,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:42,485 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 192 transitions. [2020-12-22 07:20:42,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:20:42,485 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 192 transitions. [2020-12-22 07:20:42,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:20:42,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:42,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:42,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:20:42,488 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:42,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:42,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1313145683, now seen corresponding path program 1 times [2020-12-22 07:20:42,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:42,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983190816] [2020-12-22 07:20:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:42,674 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 07:20:42,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983190816] [2020-12-22 07:20:42,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:42,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:42,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821565211] [2020-12-22 07:20:42,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:42,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:42,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:42,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:42,684 INFO L87 Difference]: Start difference. First operand 126 states and 192 transitions. Second operand 3 states. [2020-12-22 07:20:42,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:42,849 INFO L93 Difference]: Finished difference Result 255 states and 409 transitions. [2020-12-22 07:20:42,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:42,851 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 07:20:42,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:42,858 INFO L225 Difference]: With dead ends: 255 [2020-12-22 07:20:42,858 INFO L226 Difference]: Without dead ends: 186 [2020-12-22 07:20:42,859 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 07:20:42,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-22 07:20:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-12-22 07:20:42,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-22 07:20:42,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 286 transitions. [2020-12-22 07:20:42,899 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 286 transitions. Word has length 63 [2020-12-22 07:20:42,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:42,899 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 286 transitions. [2020-12-22 07:20:42,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:42,900 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 286 transitions. [2020-12-22 07:20:42,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:20:42,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:42,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:42,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:20:42,909 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:42,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:42,912 INFO L82 PathProgramCache]: Analyzing trace with hash -255493166, now seen corresponding path program 1 times [2020-12-22 07:20:42,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:42,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871818174] [2020-12-22 07:20:42,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:43,017 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 07:20:43,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871818174] [2020-12-22 07:20:43,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:43,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:43,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125570036] [2020-12-22 07:20:43,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:43,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:43,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:43,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:43,020 INFO L87 Difference]: Start difference. First operand 184 states and 286 transitions. Second operand 3 states. [2020-12-22 07:20:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:43,049 INFO L93 Difference]: Finished difference Result 309 states and 497 transitions. [2020-12-22 07:20:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:43,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:20:43,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:43,053 INFO L225 Difference]: With dead ends: 309 [2020-12-22 07:20:43,053 INFO L226 Difference]: Without dead ends: 240 [2020-12-22 07:20:43,054 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 07:20:43,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-22 07:20:43,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 238. [2020-12-22 07:20:43,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-12-22 07:20:43,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 377 transitions. [2020-12-22 07:20:43,079 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 377 transitions. Word has length 65 [2020-12-22 07:20:43,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:43,080 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 377 transitions. [2020-12-22 07:20:43,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:43,080 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 377 transitions. [2020-12-22 07:20:43,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:20:43,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:43,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:20:43,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:20:43,086 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:43,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:43,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1395779292, now seen corresponding path program 1 times [2020-12-22 07:20:43,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:43,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278314870] [2020-12-22 07:20:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:43,222 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 07:20:43,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278314870] [2020-12-22 07:20:43,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:43,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:43,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937272073] [2020-12-22 07:20:43,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:43,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:43,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:43,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:43,225 INFO L87 Difference]: Start difference. First operand 238 states and 377 transitions. Second operand 3 states. [2020-12-22 07:20:43,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:43,262 INFO L93 Difference]: Finished difference Result 575 states and 938 transitions. [2020-12-22 07:20:43,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:43,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:20:43,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:43,266 INFO L225 Difference]: With dead ends: 575 [2020-12-22 07:20:43,266 INFO L226 Difference]: Without dead ends: 396 [2020-12-22 07:20:43,268 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 07:20:43,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-12-22 07:20:43,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 394. [2020-12-22 07:20:43,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-12-22 07:20:43,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 634 transitions. [2020-12-22 07:20:43,295 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 634 transitions. Word has length 65 [2020-12-22 07:20:43,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:43,296 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 634 transitions. [2020-12-22 07:20:43,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:43,296 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 634 transitions. [2020-12-22 07:20:43,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:20:43,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:43,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:43,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:20:43,298 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:43,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:43,299 INFO L82 PathProgramCache]: Analyzing trace with hash -812427391, now seen corresponding path program 1 times [2020-12-22 07:20:43,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:43,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164108298] [2020-12-22 07:20:43,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:43,428 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 07:20:43,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164108298] [2020-12-22 07:20:43,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:43,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:43,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887790126] [2020-12-22 07:20:43,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:43,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:43,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:43,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:43,431 INFO L87 Difference]: Start difference. First operand 394 states and 634 transitions. Second operand 3 states. [2020-12-22 07:20:43,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:43,498 INFO L93 Difference]: Finished difference Result 717 states and 1171 transitions. [2020-12-22 07:20:43,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:43,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 07:20:43,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:43,508 INFO L225 Difference]: With dead ends: 717 [2020-12-22 07:20:43,508 INFO L226 Difference]: Without dead ends: 538 [2020-12-22 07:20:43,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:43,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2020-12-22 07:20:43,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 536. [2020-12-22 07:20:43,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 536 states. [2020-12-22 07:20:43,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 866 transitions. [2020-12-22 07:20:43,567 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 866 transitions. Word has length 67 [2020-12-22 07:20:43,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:43,570 INFO L481 AbstractCegarLoop]: Abstraction has 536 states and 866 transitions. [2020-12-22 07:20:43,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:43,571 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 866 transitions. [2020-12-22 07:20:43,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:20:43,572 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:43,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:43,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:20:43,572 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:43,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:43,576 INFO L82 PathProgramCache]: Analyzing trace with hash 221435787, now seen corresponding path program 1 times [2020-12-22 07:20:43,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:43,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660924677] [2020-12-22 07:20:43,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:43,737 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 07:20:43,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660924677] [2020-12-22 07:20:43,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:43,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:43,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265133104] [2020-12-22 07:20:43,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:43,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:43,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:43,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:43,744 INFO L87 Difference]: Start difference. First operand 536 states and 866 transitions. Second operand 3 states. [2020-12-22 07:20:43,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:43,807 INFO L93 Difference]: Finished difference Result 1407 states and 2299 transitions. [2020-12-22 07:20:43,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:43,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 07:20:43,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:43,817 INFO L225 Difference]: With dead ends: 1407 [2020-12-22 07:20:43,817 INFO L226 Difference]: Without dead ends: 940 [2020-12-22 07:20:43,820 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 07:20:43,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2020-12-22 07:20:43,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 938. [2020-12-22 07:20:43,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-22 07:20:43,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1514 transitions. [2020-12-22 07:20:43,878 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1514 transitions. Word has length 67 [2020-12-22 07:20:43,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:43,878 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1514 transitions. [2020-12-22 07:20:43,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:43,879 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1514 transitions. [2020-12-22 07:20:43,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:20:43,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:43,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:43,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:20:43,881 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:43,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:43,882 INFO L82 PathProgramCache]: Analyzing trace with hash 664156592, now seen corresponding path program 1 times [2020-12-22 07:20:43,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:43,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390393009] [2020-12-22 07:20:43,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:43,970 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 07:20:43,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390393009] [2020-12-22 07:20:43,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:43,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:43,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602945133] [2020-12-22 07:20:43,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:43,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:43,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:43,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:43,974 INFO L87 Difference]: Start difference. First operand 938 states and 1514 transitions. Second operand 3 states. [2020-12-22 07:20:44,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:44,039 INFO L93 Difference]: Finished difference Result 1747 states and 2845 transitions. [2020-12-22 07:20:44,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:44,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 07:20:44,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:44,050 INFO L225 Difference]: With dead ends: 1747 [2020-12-22 07:20:44,051 INFO L226 Difference]: Without dead ends: 1280 [2020-12-22 07:20:44,053 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 07:20:44,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2020-12-22 07:20:44,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1278. [2020-12-22 07:20:44,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1278 states. [2020-12-22 07:20:44,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 2059 transitions. [2020-12-22 07:20:44,127 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 2059 transitions. Word has length 69 [2020-12-22 07:20:44,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:44,127 INFO L481 AbstractCegarLoop]: Abstraction has 1278 states and 2059 transitions. [2020-12-22 07:20:44,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:44,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 2059 transitions. [2020-12-22 07:20:44,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 07:20:44,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:44,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:44,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:20:44,133 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:44,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:44,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1757720902, now seen corresponding path program 1 times [2020-12-22 07:20:44,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:44,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654405321] [2020-12-22 07:20:44,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:44,294 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 07:20:44,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654405321] [2020-12-22 07:20:44,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:44,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:20:44,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964655262] [2020-12-22 07:20:44,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:20:44,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:44,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:20:44,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:44,308 INFO L87 Difference]: Start difference. First operand 1278 states and 2059 transitions. Second operand 5 states. [2020-12-22 07:20:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:44,684 INFO L93 Difference]: Finished difference Result 6438 states and 10579 transitions. [2020-12-22 07:20:44,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:20:44,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-22 07:20:44,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:44,718 INFO L225 Difference]: With dead ends: 6438 [2020-12-22 07:20:44,718 INFO L226 Difference]: Without dead ends: 5239 [2020-12-22 07:20:44,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:20:44,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5239 states. [2020-12-22 07:20:44,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5239 to 2399. [2020-12-22 07:20:44,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2399 states. [2020-12-22 07:20:44,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 3861 transitions. [2020-12-22 07:20:44,892 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 3861 transitions. Word has length 69 [2020-12-22 07:20:44,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:44,894 INFO L481 AbstractCegarLoop]: Abstraction has 2399 states and 3861 transitions. [2020-12-22 07:20:44,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:20:44,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 3861 transitions. [2020-12-22 07:20:44,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:20:44,900 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:44,900 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:44,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:20:44,900 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:44,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:44,902 INFO L82 PathProgramCache]: Analyzing trace with hash -577605759, now seen corresponding path program 1 times [2020-12-22 07:20:44,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:44,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243704533] [2020-12-22 07:20:44,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:44,997 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 07:20:44,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243704533] [2020-12-22 07:20:44,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:44,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:44,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337745828] [2020-12-22 07:20:44,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:45,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:45,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:45,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:45,001 INFO L87 Difference]: Start difference. First operand 2399 states and 3861 transitions. Second operand 4 states. [2020-12-22 07:20:45,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:45,312 INFO L93 Difference]: Finished difference Result 7769 states and 12661 transitions. [2020-12-22 07:20:45,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:45,313 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-12-22 07:20:45,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:45,343 INFO L225 Difference]: With dead ends: 7769 [2020-12-22 07:20:45,344 INFO L226 Difference]: Without dead ends: 5449 [2020-12-22 07:20:45,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:45,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5449 states. [2020-12-22 07:20:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5449 to 3905. [2020-12-22 07:20:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3905 states. [2020-12-22 07:20:45,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 6297 transitions. [2020-12-22 07:20:45,571 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 6297 transitions. Word has length 70 [2020-12-22 07:20:45,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:45,572 INFO L481 AbstractCegarLoop]: Abstraction has 3905 states and 6297 transitions. [2020-12-22 07:20:45,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:45,572 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 6297 transitions. [2020-12-22 07:20:45,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 07:20:45,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:45,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:45,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:20:45,574 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:45,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:45,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1815229649, now seen corresponding path program 1 times [2020-12-22 07:20:45,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:45,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836802808] [2020-12-22 07:20:45,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:45,695 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 07:20:45,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836802808] [2020-12-22 07:20:45,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:45,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:45,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085261332] [2020-12-22 07:20:45,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:45,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:45,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:45,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:45,700 INFO L87 Difference]: Start difference. First operand 3905 states and 6297 transitions. Second operand 4 states. [2020-12-22 07:20:46,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:46,121 INFO L93 Difference]: Finished difference Result 12730 states and 20626 transitions. [2020-12-22 07:20:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:46,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 07:20:46,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:46,196 INFO L225 Difference]: With dead ends: 12730 [2020-12-22 07:20:46,197 INFO L226 Difference]: Without dead ends: 8904 [2020-12-22 07:20:46,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:46,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8904 states. [2020-12-22 07:20:46,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8904 to 6247. [2020-12-22 07:20:46,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6247 states. [2020-12-22 07:20:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6247 states to 6247 states and 10023 transitions. [2020-12-22 07:20:46,656 INFO L78 Accepts]: Start accepts. Automaton has 6247 states and 10023 transitions. Word has length 71 [2020-12-22 07:20:46,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:46,656 INFO L481 AbstractCegarLoop]: Abstraction has 6247 states and 10023 transitions. [2020-12-22 07:20:46,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:46,656 INFO L276 IsEmpty]: Start isEmpty. Operand 6247 states and 10023 transitions. [2020-12-22 07:20:46,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:20:46,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:46,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:46,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:20:46,658 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:46,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:46,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1147279688, now seen corresponding path program 1 times [2020-12-22 07:20:46,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:46,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491535730] [2020-12-22 07:20:46,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:46,729 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 07:20:46,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491535730] [2020-12-22 07:20:46,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:46,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:46,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320132615] [2020-12-22 07:20:46,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:46,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:46,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:46,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:46,733 INFO L87 Difference]: Start difference. First operand 6247 states and 10023 transitions. Second operand 4 states. [2020-12-22 07:20:47,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:47,399 INFO L93 Difference]: Finished difference Result 19601 states and 31573 transitions. [2020-12-22 07:20:47,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:47,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-22 07:20:47,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:47,453 INFO L225 Difference]: With dead ends: 19601 [2020-12-22 07:20:47,453 INFO L226 Difference]: Without dead ends: 13433 [2020-12-22 07:20:47,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:47,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13433 states. [2020-12-22 07:20:48,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13433 to 9797. [2020-12-22 07:20:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9797 states. [2020-12-22 07:20:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9797 states to 9797 states and 15633 transitions. [2020-12-22 07:20:48,093 INFO L78 Accepts]: Start accepts. Automaton has 9797 states and 15633 transitions. Word has length 72 [2020-12-22 07:20:48,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:48,093 INFO L481 AbstractCegarLoop]: Abstraction has 9797 states and 15633 transitions. [2020-12-22 07:20:48,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:48,093 INFO L276 IsEmpty]: Start isEmpty. Operand 9797 states and 15633 transitions. [2020-12-22 07:20:48,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:20:48,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:48,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:48,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:20:48,096 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:48,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:48,097 INFO L82 PathProgramCache]: Analyzing trace with hash -856706640, now seen corresponding path program 1 times [2020-12-22 07:20:48,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:48,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367570365] [2020-12-22 07:20:48,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:48,204 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 07:20:48,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367570365] [2020-12-22 07:20:48,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:48,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:48,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102468850] [2020-12-22 07:20:48,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:48,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:48,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:48,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:48,207 INFO L87 Difference]: Start difference. First operand 9797 states and 15633 transitions. Second operand 4 states. [2020-12-22 07:20:49,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:49,141 INFO L93 Difference]: Finished difference Result 29019 states and 46293 transitions. [2020-12-22 07:20:49,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:49,142 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-22 07:20:49,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:49,259 INFO L225 Difference]: With dead ends: 29019 [2020-12-22 07:20:49,259 INFO L226 Difference]: Without dead ends: 19231 [2020-12-22 07:20:49,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19231 states. [2020-12-22 07:20:50,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19231 to 19229. [2020-12-22 07:20:50,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19229 states. [2020-12-22 07:20:50,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19229 states to 19229 states and 30448 transitions. [2020-12-22 07:20:50,289 INFO L78 Accepts]: Start accepts. Automaton has 19229 states and 30448 transitions. Word has length 74 [2020-12-22 07:20:50,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:50,293 INFO L481 AbstractCegarLoop]: Abstraction has 19229 states and 30448 transitions. [2020-12-22 07:20:50,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:50,294 INFO L276 IsEmpty]: Start isEmpty. Operand 19229 states and 30448 transitions. [2020-12-22 07:20:50,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:20:50,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:50,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:50,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:20:50,299 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:50,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:50,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1857988380, now seen corresponding path program 1 times [2020-12-22 07:20:50,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:50,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701856562] [2020-12-22 07:20:50,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:50,347 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 07:20:50,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701856562] [2020-12-22 07:20:50,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:50,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:20:50,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356455248] [2020-12-22 07:20:50,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:20:50,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:50,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:20:50,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:20:50,351 INFO L87 Difference]: Start difference. First operand 19229 states and 30448 transitions. Second operand 3 states. [2020-12-22 07:20:51,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:51,947 INFO L93 Difference]: Finished difference Result 57649 states and 91282 transitions. [2020-12-22 07:20:51,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:20:51,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 07:20:51,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:52,070 INFO L225 Difference]: With dead ends: 57649 [2020-12-22 07:20:52,071 INFO L226 Difference]: Without dead ends: 38448 [2020-12-22 07:20:52,106 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 07:20:52,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38448 states. [2020-12-22 07:20:53,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38448 to 19231. [2020-12-22 07:20:53,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19231 states. [2020-12-22 07:20:53,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19231 states to 19231 states and 30450 transitions. [2020-12-22 07:20:53,245 INFO L78 Accepts]: Start accepts. Automaton has 19231 states and 30450 transitions. Word has length 75 [2020-12-22 07:20:53,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:53,245 INFO L481 AbstractCegarLoop]: Abstraction has 19231 states and 30450 transitions. [2020-12-22 07:20:53,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:20:53,246 INFO L276 IsEmpty]: Start isEmpty. Operand 19231 states and 30450 transitions. [2020-12-22 07:20:53,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:20:53,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:53,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:53,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:20:53,247 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:53,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:53,248 INFO L82 PathProgramCache]: Analyzing trace with hash 424514133, now seen corresponding path program 1 times [2020-12-22 07:20:53,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:53,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755549767] [2020-12-22 07:20:53,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:20:53,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755549767] [2020-12-22 07:20:53,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:53,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:53,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287814386] [2020-12-22 07:20:53,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:53,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:53,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:53,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:53,427 INFO L87 Difference]: Start difference. First operand 19231 states and 30450 transitions. Second operand 4 states. [2020-12-22 07:20:54,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:54,830 INFO L93 Difference]: Finished difference Result 56953 states and 90150 transitions. [2020-12-22 07:20:54,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:54,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 07:20:54,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:20:54,916 INFO L225 Difference]: With dead ends: 56953 [2020-12-22 07:20:54,916 INFO L226 Difference]: Without dead ends: 37734 [2020-12-22 07:20:54,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:20:54,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37734 states. [2020-12-22 07:20:56,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37734 to 37732. [2020-12-22 07:20:56,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37732 states. [2020-12-22 07:20:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37732 states to 37732 states and 59265 transitions. [2020-12-22 07:20:56,732 INFO L78 Accepts]: Start accepts. Automaton has 37732 states and 59265 transitions. Word has length 76 [2020-12-22 07:20:56,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:20:56,733 INFO L481 AbstractCegarLoop]: Abstraction has 37732 states and 59265 transitions. [2020-12-22 07:20:56,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:20:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 37732 states and 59265 transitions. [2020-12-22 07:20:56,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:20:56,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:20:56,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:56,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:20:56,735 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:20:56,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:20:56,736 INFO L82 PathProgramCache]: Analyzing trace with hash 551656516, now seen corresponding path program 1 times [2020-12-22 07:20:56,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:20:56,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072869885] [2020-12-22 07:20:56,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:20:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:20:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:20:56,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072869885] [2020-12-22 07:20:56,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:20:56,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:20:56,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319490475] [2020-12-22 07:20:56,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:20:56,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:20:56,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:20:56,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:20:56,827 INFO L87 Difference]: Start difference. First operand 37732 states and 59265 transitions. Second operand 4 states. [2020-12-22 07:20:59,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:20:59,889 INFO L93 Difference]: Finished difference Result 111688 states and 175343 transitions. [2020-12-22 07:20:59,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:20:59,890 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-12-22 07:20:59,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:00,051 INFO L225 Difference]: With dead ends: 111688 [2020-12-22 07:21:00,051 INFO L226 Difference]: Without dead ends: 74002 [2020-12-22 07:21:00,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:21:00,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74002 states. [2020-12-22 07:21:03,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74002 to 74000. [2020-12-22 07:21:03,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74000 states. [2020-12-22 07:21:03,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74000 states to 74000 states and 115247 transitions. [2020-12-22 07:21:03,626 INFO L78 Accepts]: Start accepts. Automaton has 74000 states and 115247 transitions. Word has length 76 [2020-12-22 07:21:03,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:03,626 INFO L481 AbstractCegarLoop]: Abstraction has 74000 states and 115247 transitions. [2020-12-22 07:21:03,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:03,627 INFO L276 IsEmpty]: Start isEmpty. Operand 74000 states and 115247 transitions. [2020-12-22 07:21:03,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:21:03,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:03,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:03,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:21:03,629 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:03,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:03,629 INFO L82 PathProgramCache]: Analyzing trace with hash -656359944, now seen corresponding path program 1 times [2020-12-22 07:21:03,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:03,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592067955] [2020-12-22 07:21:03,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:21:03,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592067955] [2020-12-22 07:21:03,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:03,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:03,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334396538] [2020-12-22 07:21:03,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:03,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:03,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:03,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:03,662 INFO L87 Difference]: Start difference. First operand 74000 states and 115247 transitions. Second operand 3 states. [2020-12-22 07:21:09,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:09,264 INFO L93 Difference]: Finished difference Result 221876 states and 345549 transitions. [2020-12-22 07:21:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:21:09,266 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 07:21:09,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:09,585 INFO L225 Difference]: With dead ends: 221876 [2020-12-22 07:21:09,585 INFO L226 Difference]: Without dead ends: 147950 [2020-12-22 07:21:09,670 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 07:21:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147950 states. [2020-12-22 07:21:13,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147950 to 74008. [2020-12-22 07:21:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74008 states. [2020-12-22 07:21:13,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74008 states to 74008 states and 115255 transitions. [2020-12-22 07:21:13,849 INFO L78 Accepts]: Start accepts. Automaton has 74008 states and 115255 transitions. Word has length 77 [2020-12-22 07:21:13,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:13,850 INFO L481 AbstractCegarLoop]: Abstraction has 74008 states and 115255 transitions. [2020-12-22 07:21:13,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:21:13,850 INFO L276 IsEmpty]: Start isEmpty. Operand 74008 states and 115255 transitions. [2020-12-22 07:21:13,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:21:13,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:13,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:13,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:21:13,853 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:13,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:13,853 INFO L82 PathProgramCache]: Analyzing trace with hash 834408617, now seen corresponding path program 1 times [2020-12-22 07:21:13,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:13,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413741896] [2020-12-22 07:21:13,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:13,951 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 07:21:13,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413741896] [2020-12-22 07:21:13,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:13,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:13,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105750890] [2020-12-22 07:21:13,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:13,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:13,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:13,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:13,955 INFO L87 Difference]: Start difference. First operand 74008 states and 115255 transitions. Second operand 4 states. [2020-12-22 07:21:19,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:19,647 INFO L93 Difference]: Finished difference Result 219052 states and 340946 transitions. [2020-12-22 07:21:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:19,648 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 07:21:19,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:19,938 INFO L225 Difference]: With dead ends: 219052 [2020-12-22 07:21:19,938 INFO L226 Difference]: Without dead ends: 145099 [2020-12-22 07:21:20,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:21:20,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145099 states. [2020-12-22 07:21:26,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145099 to 145097. [2020-12-22 07:21:26,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145097 states. [2020-12-22 07:21:26,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145097 states to 145097 states and 223973 transitions. [2020-12-22 07:21:26,836 INFO L78 Accepts]: Start accepts. Automaton has 145097 states and 223973 transitions. Word has length 78 [2020-12-22 07:21:26,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:26,837 INFO L481 AbstractCegarLoop]: Abstraction has 145097 states and 223973 transitions. [2020-12-22 07:21:26,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:26,837 INFO L276 IsEmpty]: Start isEmpty. Operand 145097 states and 223973 transitions. [2020-12-22 07:21:26,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:21:26,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:26,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:26,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:21:26,841 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:26,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:26,842 INFO L82 PathProgramCache]: Analyzing trace with hash 640680152, now seen corresponding path program 1 times [2020-12-22 07:21:26,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:26,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404308994] [2020-12-22 07:21:26,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:26,924 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 07:21:26,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404308994] [2020-12-22 07:21:26,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:26,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:21:26,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132742152] [2020-12-22 07:21:26,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:21:26,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:26,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:21:26,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:21:26,926 INFO L87 Difference]: Start difference. First operand 145097 states and 223973 transitions. Second operand 4 states. [2020-12-22 07:21:38,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:21:38,755 INFO L93 Difference]: Finished difference Result 429317 states and 662223 transitions. [2020-12-22 07:21:38,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:21:38,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 07:21:38,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:21:39,542 INFO L225 Difference]: With dead ends: 429317 [2020-12-22 07:21:39,542 INFO L226 Difference]: Without dead ends: 284379 [2020-12-22 07:21:39,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:21:39,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284379 states. [2020-12-22 07:21:53,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284379 to 284377. [2020-12-22 07:21:53,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284377 states. [2020-12-22 07:21:54,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284377 states to 284377 states and 434901 transitions. [2020-12-22 07:21:54,196 INFO L78 Accepts]: Start accepts. Automaton has 284377 states and 434901 transitions. Word has length 78 [2020-12-22 07:21:54,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:21:54,197 INFO L481 AbstractCegarLoop]: Abstraction has 284377 states and 434901 transitions. [2020-12-22 07:21:54,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:21:54,197 INFO L276 IsEmpty]: Start isEmpty. Operand 284377 states and 434901 transitions. [2020-12-22 07:21:54,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:21:54,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:21:54,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:54,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:21:54,209 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:21:54,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:21:54,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1890599668, now seen corresponding path program 1 times [2020-12-22 07:21:54,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:21:54,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423819668] [2020-12-22 07:21:54,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:21:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:21:54,280 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 07:21:54,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423819668] [2020-12-22 07:21:54,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:21:54,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:21:54,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558712073] [2020-12-22 07:21:54,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:21:54,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:21:54,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:21:54,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:21:54,282 INFO L87 Difference]: Start difference. First operand 284377 states and 434901 transitions. Second operand 3 states. [2020-12-22 07:22:18,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:22:18,322 INFO L93 Difference]: Finished difference Result 851837 states and 1303111 transitions. [2020-12-22 07:22:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:22:18,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 07:22:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:22:19,874 INFO L225 Difference]: With dead ends: 851837 [2020-12-22 07:22:19,874 INFO L226 Difference]: Without dead ends: 568523 [2020-12-22 07:22:20,191 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 07:22:20,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568523 states. [2020-12-22 07:22:37,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568523 to 284409. [2020-12-22 07:22:37,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284409 states. [2020-12-22 07:22:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284409 states to 284409 states and 434933 transitions. [2020-12-22 07:22:38,542 INFO L78 Accepts]: Start accepts. Automaton has 284409 states and 434933 transitions. Word has length 79 [2020-12-22 07:22:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:22:38,542 INFO L481 AbstractCegarLoop]: Abstraction has 284409 states and 434933 transitions. [2020-12-22 07:22:38,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:22:38,543 INFO L276 IsEmpty]: Start isEmpty. Operand 284409 states and 434933 transitions. [2020-12-22 07:22:38,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:22:38,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:22:38,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:38,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:22:38,549 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:22:38,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:22:38,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1453451011, now seen corresponding path program 1 times [2020-12-22 07:22:38,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:22:38,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267420482] [2020-12-22 07:22:38,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:22:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:22:38,653 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 07:22:38,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267420482] [2020-12-22 07:22:38,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:22:38,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:22:38,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319736764] [2020-12-22 07:22:38,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:22:38,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:22:38,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:22:38,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:22:38,656 INFO L87 Difference]: Start difference. First operand 284409 states and 434933 transitions. Second operand 4 states. [2020-12-22 07:23:06,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:23:06,513 INFO L93 Difference]: Finished difference Result 841360 states and 1285587 transitions. [2020-12-22 07:23:06,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:23:06,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-12-22 07:23:06,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:23:07,858 INFO L225 Difference]: With dead ends: 841360 [2020-12-22 07:23:07,858 INFO L226 Difference]: Without dead ends: 557202 [2020-12-22 07:23:08,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:23:08,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557202 states. [2020-12-22 07:23:37,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557202 to 557200. [2020-12-22 07:23:37,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 557200 states. [2020-12-22 07:23:40,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557200 states to 557200 states and 843845 transitions. [2020-12-22 07:23:40,698 INFO L78 Accepts]: Start accepts. Automaton has 557200 states and 843845 transitions. Word has length 80 [2020-12-22 07:23:40,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:23:40,699 INFO L481 AbstractCegarLoop]: Abstraction has 557200 states and 843845 transitions. [2020-12-22 07:23:40,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:23:40,699 INFO L276 IsEmpty]: Start isEmpty. Operand 557200 states and 843845 transitions. [2020-12-22 07:23:40,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:23:40,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:23:40,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:40,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:23:40,730 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:23:40,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:23:40,731 INFO L82 PathProgramCache]: Analyzing trace with hash -194781332, now seen corresponding path program 1 times [2020-12-22 07:23:40,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:23:40,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469934584] [2020-12-22 07:23:40,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:23:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:23:40,859 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 07:23:40,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469934584] [2020-12-22 07:23:40,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:23:40,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:23:40,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011968307] [2020-12-22 07:23:40,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:23:40,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:23:40,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:23:40,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:23:40,862 INFO L87 Difference]: Start difference. First operand 557200 states and 843845 transitions. Second operand 4 states. [2020-12-22 07:24:01,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:24:01,246 INFO L93 Difference]: Finished difference Result 912150 states and 1377906 transitions. [2020-12-22 07:24:01,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:24:01,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-12-22 07:24:01,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:24:02,059 INFO L225 Difference]: With dead ends: 912150 [2020-12-22 07:24:02,059 INFO L226 Difference]: Without dead ends: 355377 [2020-12-22 07:24:02,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:24:02,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355377 states.