/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_opt-floodmax.3.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:40:56,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:40:56,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:40:56,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:40:56,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:40:56,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:40:56,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:40:56,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:40:56,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:40:56,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:40:56,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:40:56,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:40:56,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:40:56,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:40:56,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:40:56,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:40:56,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:40:56,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:40:56,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:40:56,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:40:56,710 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:40:56,736 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:40:56,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:40:56,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:40:56,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:40:56,739 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:40:56,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:40:56,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:40:56,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:40:56,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:40:56,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:40:56,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:40:56,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:40:56,740 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:40:56,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:40:56,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:40:56,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:40:56,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:40:56,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:40:56,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:40:56,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:40:56,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:40:56,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:40:56,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:40:56,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:40:56,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:40:56,743 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:40:57,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:40:57,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:40:57,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:40:57,151 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:40:57,151 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:40:57,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c [2020-12-22 07:40:57,231 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d16594d00/db1f92cbb3da4071a2f954185be106e1/FLAG10829d380 [2020-12-22 07:40:57,813 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:40:57,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c [2020-12-22 07:40:57,826 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d16594d00/db1f92cbb3da4071a2f954185be106e1/FLAG10829d380 [2020-12-22 07:40:58,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d16594d00/db1f92cbb3da4071a2f954185be106e1 [2020-12-22 07:40:58,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:40:58,132 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:40:58,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:40:58,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:40:58,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:40:58,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32df33b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58, skipping insertion in model container [2020-12-22 07:40:58,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:40:58,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:40:58,507 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_opt-floodmax.3.ufo.UNBOUNDED.pals.c[14509,14522] [2020-12-22 07:40:58,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:40:58,522 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:40:58,672 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_opt-floodmax.3.ufo.UNBOUNDED.pals.c[14509,14522] [2020-12-22 07:40:58,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:40:58,711 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:40:58,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58 WrapperNode [2020-12-22 07:40:58,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:40:58,713 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:40:58,713 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:40:58,714 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:40:58,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,835 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:40:58,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:40:58,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:40:58,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:40:58,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (1/1) ... [2020-12-22 07:40:58,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:40:58,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:40:58,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:40:58,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:40:58,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (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 07:40:59,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:40:59,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:40:59,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:40:59,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:41:00,062 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:41:00,063 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-22 07:41:00,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:41:00 BoogieIcfgContainer [2020-12-22 07:41:00,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:41:00,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:41:00,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:41:00,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:41:00,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:40:58" (1/3) ... [2020-12-22 07:41:00,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77610ba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:41:00, skipping insertion in model container [2020-12-22 07:41:00,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:40:58" (2/3) ... [2020-12-22 07:41:00,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77610ba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:41:00, skipping insertion in model container [2020-12-22 07:41:00,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:41:00" (3/3) ... [2020-12-22 07:41:00,075 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.UNBOUNDED.pals.c [2020-12-22 07:41:00,082 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:41:00,087 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:41:00,107 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:41:00,136 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:41:00,136 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:41:00,136 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:41:00,136 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:41:00,137 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:41:00,137 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:41:00,137 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:41:00,137 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:41:00,157 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states. [2020-12-22 07:41:00,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:41:00,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:00,168 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 07:41:00,169 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:00,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:00,175 INFO L82 PathProgramCache]: Analyzing trace with hash -812713456, now seen corresponding path program 1 times [2020-12-22 07:41:00,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:00,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545610860] [2020-12-22 07:41:00,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:00,474 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 07:41:00,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545610860] [2020-12-22 07:41:00,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:00,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:41:00,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375045617] [2020-12-22 07:41:00,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:41:00,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:00,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:41:00,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:41:00,509 INFO L87 Difference]: Start difference. First operand 148 states. Second operand 2 states. [2020-12-22 07:41:00,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:00,570 INFO L93 Difference]: Finished difference Result 233 states and 401 transitions. [2020-12-22 07:41:00,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:41:00,572 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2020-12-22 07:41:00,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:00,600 INFO L225 Difference]: With dead ends: 233 [2020-12-22 07:41:00,601 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 07:41:00,605 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 07:41:00,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 07:41:00,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-12-22 07:41:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-22 07:41:00,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 249 transitions. [2020-12-22 07:41:00,681 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 249 transitions. Word has length 37 [2020-12-22 07:41:00,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:00,681 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 249 transitions. [2020-12-22 07:41:00,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:41:00,682 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 249 transitions. [2020-12-22 07:41:00,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 07:41:00,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:00,690 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 07:41:00,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:41:00,691 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:00,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:00,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1630361906, now seen corresponding path program 1 times [2020-12-22 07:41:00,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:00,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929213772] [2020-12-22 07:41:00,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:00,858 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 07:41:00,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929213772] [2020-12-22 07:41:00,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:00,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:41:00,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439098179] [2020-12-22 07:41:00,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:41:00,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:00,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:41:00,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:00,862 INFO L87 Difference]: Start difference. First operand 144 states and 249 transitions. Second operand 5 states. [2020-12-22 07:41:00,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:00,948 INFO L93 Difference]: Finished difference Result 232 states and 394 transitions. [2020-12-22 07:41:00,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:41:00,949 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 07:41:00,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:00,951 INFO L225 Difference]: With dead ends: 232 [2020-12-22 07:41:00,951 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 07:41:00,952 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 07:41:00,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 07:41:00,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-12-22 07:41:00,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-22 07:41:00,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 219 transitions. [2020-12-22 07:41:00,963 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 219 transitions. Word has length 37 [2020-12-22 07:41:00,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:00,963 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 219 transitions. [2020-12-22 07:41:00,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:41:00,964 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 219 transitions. [2020-12-22 07:41:00,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:41:00,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:00,966 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] [2020-12-22 07:41:00,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:41:00,966 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:00,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:00,967 INFO L82 PathProgramCache]: Analyzing trace with hash 190573204, now seen corresponding path program 1 times [2020-12-22 07:41:00,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:00,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982212378] [2020-12-22 07:41:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:01,120 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 07:41:01,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982212378] [2020-12-22 07:41:01,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:01,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:01,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770531266] [2020-12-22 07:41:01,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:01,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:01,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:01,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:01,124 INFO L87 Difference]: Start difference. First operand 144 states and 219 transitions. Second operand 3 states. [2020-12-22 07:41:01,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:01,200 INFO L93 Difference]: Finished difference Result 302 states and 483 transitions. [2020-12-22 07:41:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:01,201 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 07:41:01,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:01,203 INFO L225 Difference]: With dead ends: 302 [2020-12-22 07:41:01,204 INFO L226 Difference]: Without dead ends: 218 [2020-12-22 07:41:01,205 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 07:41:01,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-22 07:41:01,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2020-12-22 07:41:01,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-12-22 07:41:01,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 334 transitions. [2020-12-22 07:41:01,223 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 334 transitions. Word has length 66 [2020-12-22 07:41:01,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:01,224 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 334 transitions. [2020-12-22 07:41:01,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:01,224 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 334 transitions. [2020-12-22 07:41:01,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 07:41:01,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:01,226 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] [2020-12-22 07:41:01,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:41:01,227 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:01,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:01,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1527919177, now seen corresponding path program 1 times [2020-12-22 07:41:01,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:01,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390393009] [2020-12-22 07:41:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:01,347 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 07:41:01,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390393009] [2020-12-22 07:41:01,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:01,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:01,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836847788] [2020-12-22 07:41:01,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:01,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:01,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:01,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:01,354 INFO L87 Difference]: Start difference. First operand 215 states and 334 transitions. Second operand 3 states. [2020-12-22 07:41:01,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:01,401 INFO L93 Difference]: Finished difference Result 509 states and 818 transitions. [2020-12-22 07:41:01,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:01,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 07:41:01,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:01,407 INFO L225 Difference]: With dead ends: 509 [2020-12-22 07:41:01,408 INFO L226 Difference]: Without dead ends: 354 [2020-12-22 07:41:01,410 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 07:41:01,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-12-22 07:41:01,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 350. [2020-12-22 07:41:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-12-22 07:41:01,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 555 transitions. [2020-12-22 07:41:01,458 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 555 transitions. Word has length 68 [2020-12-22 07:41:01,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:01,459 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 555 transitions. [2020-12-22 07:41:01,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:01,459 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 555 transitions. [2020-12-22 07:41:01,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:41:01,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:01,462 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 07:41:01,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:41:01,462 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:01,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:01,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1063335298, now seen corresponding path program 1 times [2020-12-22 07:41:01,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:01,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961838817] [2020-12-22 07:41:01,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:01,623 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 07:41:01,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961838817] [2020-12-22 07:41:01,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:01,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:01,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104744316] [2020-12-22 07:41:01,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:01,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:01,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:01,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:01,626 INFO L87 Difference]: Start difference. First operand 350 states and 555 transitions. Second operand 3 states. [2020-12-22 07:41:01,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:01,668 INFO L93 Difference]: Finished difference Result 898 states and 1453 transitions. [2020-12-22 07:41:01,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:01,668 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 07:41:01,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:01,672 INFO L225 Difference]: With dead ends: 898 [2020-12-22 07:41:01,672 INFO L226 Difference]: Without dead ends: 608 [2020-12-22 07:41:01,674 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 07:41:01,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2020-12-22 07:41:01,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 602. [2020-12-22 07:41:01,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-12-22 07:41:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 963 transitions. [2020-12-22 07:41:01,697 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 963 transitions. Word has length 70 [2020-12-22 07:41:01,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:01,698 INFO L481 AbstractCegarLoop]: Abstraction has 602 states and 963 transitions. [2020-12-22 07:41:01,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:01,698 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 963 transitions. [2020-12-22 07:41:01,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:41:01,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:01,699 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 07:41:01,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:41:01,700 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:01,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:01,700 INFO L82 PathProgramCache]: Analyzing trace with hash 845837107, now seen corresponding path program 1 times [2020-12-22 07:41:01,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:01,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801361315] [2020-12-22 07:41:01,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:01,849 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 07:41:01,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801361315] [2020-12-22 07:41:01,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:01,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:41:01,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343791577] [2020-12-22 07:41:01,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:41:01,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:01,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:41:01,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:41:01,852 INFO L87 Difference]: Start difference. First operand 602 states and 963 transitions. Second operand 5 states. [2020-12-22 07:41:02,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:02,027 INFO L93 Difference]: Finished difference Result 2296 states and 3768 transitions. [2020-12-22 07:41:02,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:41:02,027 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-22 07:41:02,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:02,038 INFO L225 Difference]: With dead ends: 2296 [2020-12-22 07:41:02,038 INFO L226 Difference]: Without dead ends: 1754 [2020-12-22 07:41:02,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:41:02,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2020-12-22 07:41:02,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1077. [2020-12-22 07:41:02,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1077 states. [2020-12-22 07:41:02,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1739 transitions. [2020-12-22 07:41:02,086 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1739 transitions. Word has length 72 [2020-12-22 07:41:02,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:02,086 INFO L481 AbstractCegarLoop]: Abstraction has 1077 states and 1739 transitions. [2020-12-22 07:41:02,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:41:02,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1739 transitions. [2020-12-22 07:41:02,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 07:41:02,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:02,088 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] [2020-12-22 07:41:02,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:41:02,088 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:02,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:02,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1471686026, now seen corresponding path program 1 times [2020-12-22 07:41:02,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:02,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111664665] [2020-12-22 07:41:02,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:02,163 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 07:41:02,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111664665] [2020-12-22 07:41:02,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:02,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:02,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33379236] [2020-12-22 07:41:02,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:02,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:02,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:02,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:02,166 INFO L87 Difference]: Start difference. First operand 1077 states and 1739 transitions. Second operand 4 states. [2020-12-22 07:41:02,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:02,285 INFO L93 Difference]: Finished difference Result 3138 states and 5142 transitions. [2020-12-22 07:41:02,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:02,286 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-12-22 07:41:02,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:02,297 INFO L225 Difference]: With dead ends: 3138 [2020-12-22 07:41:02,298 INFO L226 Difference]: Without dead ends: 2121 [2020-12-22 07:41:02,300 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 07:41:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2020-12-22 07:41:02,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1590. [2020-12-22 07:41:02,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1590 states. [2020-12-22 07:41:02,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 2581 transitions. [2020-12-22 07:41:02,399 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 2581 transitions. Word has length 73 [2020-12-22 07:41:02,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:02,399 INFO L481 AbstractCegarLoop]: Abstraction has 1590 states and 2581 transitions. [2020-12-22 07:41:02,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:02,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 2581 transitions. [2020-12-22 07:41:02,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 07:41:02,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:02,401 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 07:41:02,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:41:02,402 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:02,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:02,402 INFO L82 PathProgramCache]: Analyzing trace with hash -131454774, now seen corresponding path program 1 times [2020-12-22 07:41:02,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:02,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773617365] [2020-12-22 07:41:02,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:02,466 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 07:41:02,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773617365] [2020-12-22 07:41:02,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:02,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:02,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144859235] [2020-12-22 07:41:02,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:02,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:02,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:02,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:02,469 INFO L87 Difference]: Start difference. First operand 1590 states and 2581 transitions. Second operand 4 states. [2020-12-22 07:41:02,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:02,611 INFO L93 Difference]: Finished difference Result 4612 states and 7546 transitions. [2020-12-22 07:41:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:02,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-12-22 07:41:02,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:02,628 INFO L225 Difference]: With dead ends: 4612 [2020-12-22 07:41:02,628 INFO L226 Difference]: Without dead ends: 3082 [2020-12-22 07:41:02,632 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 07:41:02,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3082 states. [2020-12-22 07:41:02,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3082 to 2324. [2020-12-22 07:41:02,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2324 states. [2020-12-22 07:41:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 3771 transitions. [2020-12-22 07:41:02,725 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 3771 transitions. Word has length 74 [2020-12-22 07:41:02,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:02,726 INFO L481 AbstractCegarLoop]: Abstraction has 2324 states and 3771 transitions. [2020-12-22 07:41:02,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 3771 transitions. [2020-12-22 07:41:02,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 07:41:02,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:02,728 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 07:41:02,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:41:02,729 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:02,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:02,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1364954579, now seen corresponding path program 1 times [2020-12-22 07:41:02,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:02,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789915074] [2020-12-22 07:41:02,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:02,847 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 07:41:02,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789915074] [2020-12-22 07:41:02,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:02,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:02,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646425700] [2020-12-22 07:41:02,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:02,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:02,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:02,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:02,850 INFO L87 Difference]: Start difference. First operand 2324 states and 3771 transitions. Second operand 4 states. [2020-12-22 07:41:03,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:03,028 INFO L93 Difference]: Finished difference Result 6704 states and 10946 transitions. [2020-12-22 07:41:03,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:03,029 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-12-22 07:41:03,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:03,052 INFO L225 Difference]: With dead ends: 6704 [2020-12-22 07:41:03,053 INFO L226 Difference]: Without dead ends: 4440 [2020-12-22 07:41:03,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 07:41:03,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2020-12-22 07:41:03,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 3366. [2020-12-22 07:41:03,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3366 states. [2020-12-22 07:41:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 5455 transitions. [2020-12-22 07:41:03,240 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 5455 transitions. Word has length 75 [2020-12-22 07:41:03,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:03,241 INFO L481 AbstractCegarLoop]: Abstraction has 3366 states and 5455 transitions. [2020-12-22 07:41:03,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 5455 transitions. [2020-12-22 07:41:03,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:41:03,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:03,243 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 07:41:03,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:41:03,244 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:03,244 INFO L82 PathProgramCache]: Analyzing trace with hash 915332421, now seen corresponding path program 1 times [2020-12-22 07:41:03,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:03,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419399429] [2020-12-22 07:41:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:03,306 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 07:41:03,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419399429] [2020-12-22 07:41:03,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:03,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:03,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432281407] [2020-12-22 07:41:03,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:03,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:03,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:03,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:03,309 INFO L87 Difference]: Start difference. First operand 3366 states and 5455 transitions. Second operand 3 states. [2020-12-22 07:41:03,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:03,470 INFO L93 Difference]: Finished difference Result 7652 states and 12412 transitions. [2020-12-22 07:41:03,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:03,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:41:03,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:03,499 INFO L225 Difference]: With dead ends: 7652 [2020-12-22 07:41:03,500 INFO L226 Difference]: Without dead ends: 5262 [2020-12-22 07:41:03,506 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 07:41:03,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5262 states. [2020-12-22 07:41:03,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5262 to 5260. [2020-12-22 07:41:03,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5260 states. [2020-12-22 07:41:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5260 states to 5260 states and 8462 transitions. [2020-12-22 07:41:03,764 INFO L78 Accepts]: Start accepts. Automaton has 5260 states and 8462 transitions. Word has length 76 [2020-12-22 07:41:03,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:03,765 INFO L481 AbstractCegarLoop]: Abstraction has 5260 states and 8462 transitions. [2020-12-22 07:41:03,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 5260 states and 8462 transitions. [2020-12-22 07:41:03,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:41:03,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:03,766 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 07:41:03,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:41:03,767 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:03,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:03,767 INFO L82 PathProgramCache]: Analyzing trace with hash -318395451, now seen corresponding path program 1 times [2020-12-22 07:41:03,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:03,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075235550] [2020-12-22 07:41:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:03,817 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 07:41:03,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075235550] [2020-12-22 07:41:03,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:03,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:03,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649498797] [2020-12-22 07:41:03,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:03,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:03,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:03,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:03,820 INFO L87 Difference]: Start difference. First operand 5260 states and 8462 transitions. Second operand 3 states. [2020-12-22 07:41:04,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:04,036 INFO L93 Difference]: Finished difference Result 11472 states and 18516 transitions. [2020-12-22 07:41:04,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:04,037 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:41:04,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:04,120 INFO L225 Difference]: With dead ends: 11472 [2020-12-22 07:41:04,121 INFO L226 Difference]: Without dead ends: 7772 [2020-12-22 07:41:04,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:04,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7772 states. [2020-12-22 07:41:04,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7772 to 7770. [2020-12-22 07:41:04,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7770 states. [2020-12-22 07:41:04,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7770 states to 7770 states and 12446 transitions. [2020-12-22 07:41:04,448 INFO L78 Accepts]: Start accepts. Automaton has 7770 states and 12446 transitions. Word has length 76 [2020-12-22 07:41:04,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:04,448 INFO L481 AbstractCegarLoop]: Abstraction has 7770 states and 12446 transitions. [2020-12-22 07:41:04,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:04,448 INFO L276 IsEmpty]: Start isEmpty. Operand 7770 states and 12446 transitions. [2020-12-22 07:41:04,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:41:04,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:04,450 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 07:41:04,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:41:04,450 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:04,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:04,451 INFO L82 PathProgramCache]: Analyzing trace with hash 700947013, now seen corresponding path program 1 times [2020-12-22 07:41:04,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:04,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997660849] [2020-12-22 07:41:04,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:04,540 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 07:41:04,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997660849] [2020-12-22 07:41:04,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:04,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:04,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119760127] [2020-12-22 07:41:04,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:04,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:04,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:04,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:04,543 INFO L87 Difference]: Start difference. First operand 7770 states and 12446 transitions. Second operand 3 states. [2020-12-22 07:41:04,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:04,931 INFO L93 Difference]: Finished difference Result 17197 states and 27794 transitions. [2020-12-22 07:41:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:04,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 07:41:04,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:04,971 INFO L225 Difference]: With dead ends: 17197 [2020-12-22 07:41:04,971 INFO L226 Difference]: Without dead ends: 11540 [2020-12-22 07:41:04,980 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 07:41:04,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11540 states. [2020-12-22 07:41:05,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11540 to 11538. [2020-12-22 07:41:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11538 states. [2020-12-22 07:41:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11538 states to 11538 states and 18443 transitions. [2020-12-22 07:41:05,539 INFO L78 Accepts]: Start accepts. Automaton has 11538 states and 18443 transitions. Word has length 76 [2020-12-22 07:41:05,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:05,539 INFO L481 AbstractCegarLoop]: Abstraction has 11538 states and 18443 transitions. [2020-12-22 07:41:05,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 11538 states and 18443 transitions. [2020-12-22 07:41:05,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 07:41:05,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:05,540 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 07:41:05,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:41:05,541 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:05,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:05,542 INFO L82 PathProgramCache]: Analyzing trace with hash 411123109, now seen corresponding path program 1 times [2020-12-22 07:41:05,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:05,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789561453] [2020-12-22 07:41:05,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:05,713 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 07:41:05,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789561453] [2020-12-22 07:41:05,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:05,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:05,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306169476] [2020-12-22 07:41:05,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:05,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:05,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:05,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:05,716 INFO L87 Difference]: Start difference. First operand 11538 states and 18443 transitions. Second operand 4 states. [2020-12-22 07:41:06,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:06,815 INFO L93 Difference]: Finished difference Result 34109 states and 54457 transitions. [2020-12-22 07:41:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:06,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-12-22 07:41:06,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:06,893 INFO L225 Difference]: With dead ends: 34109 [2020-12-22 07:41:06,893 INFO L226 Difference]: Without dead ends: 22580 [2020-12-22 07:41:06,920 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 07:41:06,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22580 states. [2020-12-22 07:41:08,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22580 to 22578. [2020-12-22 07:41:08,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22578 states. [2020-12-22 07:41:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22578 states to 22578 states and 35802 transitions. [2020-12-22 07:41:08,110 INFO L78 Accepts]: Start accepts. Automaton has 22578 states and 35802 transitions. Word has length 77 [2020-12-22 07:41:08,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:08,110 INFO L481 AbstractCegarLoop]: Abstraction has 22578 states and 35802 transitions. [2020-12-22 07:41:08,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:08,110 INFO L276 IsEmpty]: Start isEmpty. Operand 22578 states and 35802 transitions. [2020-12-22 07:41:08,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:41:08,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:08,116 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 07:41:08,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:41:08,116 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:08,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:08,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1502774817, now seen corresponding path program 1 times [2020-12-22 07:41:08,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:08,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797223645] [2020-12-22 07:41:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:08,168 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 07:41:08,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797223645] [2020-12-22 07:41:08,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:08,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:08,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181100545] [2020-12-22 07:41:08,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:08,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:08,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:08,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:08,171 INFO L87 Difference]: Start difference. First operand 22578 states and 35802 transitions. Second operand 3 states. [2020-12-22 07:41:09,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:09,373 INFO L93 Difference]: Finished difference Result 54911 states and 87576 transitions. [2020-12-22 07:41:09,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:09,374 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:41:09,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:09,485 INFO L225 Difference]: With dead ends: 54911 [2020-12-22 07:41:09,485 INFO L226 Difference]: Without dead ends: 32462 [2020-12-22 07:41:09,522 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 07:41:09,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32462 states. [2020-12-22 07:41:10,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32462 to 31186. [2020-12-22 07:41:10,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31186 states. [2020-12-22 07:41:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31186 states to 31186 states and 49355 transitions. [2020-12-22 07:41:11,134 INFO L78 Accepts]: Start accepts. Automaton has 31186 states and 49355 transitions. Word has length 78 [2020-12-22 07:41:11,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:11,134 INFO L481 AbstractCegarLoop]: Abstraction has 31186 states and 49355 transitions. [2020-12-22 07:41:11,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 31186 states and 49355 transitions. [2020-12-22 07:41:11,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 07:41:11,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:11,136 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 07:41:11,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 07:41:11,136 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:11,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:11,139 INFO L82 PathProgramCache]: Analyzing trace with hash -225322511, now seen corresponding path program 1 times [2020-12-22 07:41:11,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:11,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617166577] [2020-12-22 07:41:11,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:11,181 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 07:41:11,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617166577] [2020-12-22 07:41:11,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:11,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:11,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193590293] [2020-12-22 07:41:11,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:11,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:11,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:11,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:11,185 INFO L87 Difference]: Start difference. First operand 31186 states and 49355 transitions. Second operand 3 states. [2020-12-22 07:41:12,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:12,966 INFO L93 Difference]: Finished difference Result 93520 states and 148003 transitions. [2020-12-22 07:41:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:12,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 07:41:12,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:13,101 INFO L225 Difference]: With dead ends: 93520 [2020-12-22 07:41:13,101 INFO L226 Difference]: Without dead ends: 62362 [2020-12-22 07:41:13,138 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 07:41:13,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62362 states. [2020-12-22 07:41:14,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62362 to 31188. [2020-12-22 07:41:14,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31188 states. [2020-12-22 07:41:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31188 states to 31188 states and 49357 transitions. [2020-12-22 07:41:14,763 INFO L78 Accepts]: Start accepts. Automaton has 31188 states and 49357 transitions. Word has length 78 [2020-12-22 07:41:14,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:14,763 INFO L481 AbstractCegarLoop]: Abstraction has 31188 states and 49357 transitions. [2020-12-22 07:41:14,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:14,764 INFO L276 IsEmpty]: Start isEmpty. Operand 31188 states and 49357 transitions. [2020-12-22 07:41:14,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 07:41:14,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:14,765 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 07:41:14,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 07:41:14,765 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:14,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:14,766 INFO L82 PathProgramCache]: Analyzing trace with hash -577611119, now seen corresponding path program 1 times [2020-12-22 07:41:14,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:14,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624006879] [2020-12-22 07:41:14,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:41:14,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624006879] [2020-12-22 07:41:14,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:14,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:14,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151003406] [2020-12-22 07:41:14,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:14,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:14,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:14,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:14,858 INFO L87 Difference]: Start difference. First operand 31188 states and 49357 transitions. Second operand 4 states. [2020-12-22 07:41:16,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:16,996 INFO L93 Difference]: Finished difference Result 92206 states and 145749 transitions. [2020-12-22 07:41:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:16,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-12-22 07:41:16,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:17,140 INFO L225 Difference]: With dead ends: 92206 [2020-12-22 07:41:17,141 INFO L226 Difference]: Without dead ends: 61048 [2020-12-22 07:41:17,179 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 07:41:17,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61048 states. [2020-12-22 07:41:19,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61048 to 61046. [2020-12-22 07:41:19,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61046 states. [2020-12-22 07:41:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61046 states to 61046 states and 95880 transitions. [2020-12-22 07:41:19,497 INFO L78 Accepts]: Start accepts. Automaton has 61046 states and 95880 transitions. Word has length 79 [2020-12-22 07:41:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:19,498 INFO L481 AbstractCegarLoop]: Abstraction has 61046 states and 95880 transitions. [2020-12-22 07:41:19,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 61046 states and 95880 transitions. [2020-12-22 07:41:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:41:19,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:19,499 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 07:41:19,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 07:41:19,499 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:19,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:19,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1003564987, now seen corresponding path program 1 times [2020-12-22 07:41:19,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:19,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937510954] [2020-12-22 07:41:19,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:19,555 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 07:41:19,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937510954] [2020-12-22 07:41:19,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:19,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:19,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937275484] [2020-12-22 07:41:19,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:19,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:19,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:19,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:19,558 INFO L87 Difference]: Start difference. First operand 61046 states and 95880 transitions. Second operand 3 states. [2020-12-22 07:41:22,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:22,162 INFO L93 Difference]: Finished difference Result 148150 states and 233536 transitions. [2020-12-22 07:41:22,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:22,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:41:22,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:22,294 INFO L225 Difference]: With dead ends: 148150 [2020-12-22 07:41:22,294 INFO L226 Difference]: Without dead ends: 87384 [2020-12-22 07:41:22,341 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 07:41:22,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87384 states. [2020-12-22 07:41:25,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87384 to 84054. [2020-12-22 07:41:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84054 states. [2020-12-22 07:41:25,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84054 states to 84054 states and 131502 transitions. [2020-12-22 07:41:25,433 INFO L78 Accepts]: Start accepts. Automaton has 84054 states and 131502 transitions. Word has length 80 [2020-12-22 07:41:25,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:25,434 INFO L481 AbstractCegarLoop]: Abstraction has 84054 states and 131502 transitions. [2020-12-22 07:41:25,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:25,434 INFO L276 IsEmpty]: Start isEmpty. Operand 84054 states and 131502 transitions. [2020-12-22 07:41:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 07:41:25,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:25,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:41:25,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:41:25,436 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:25,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:25,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1064997795, now seen corresponding path program 1 times [2020-12-22 07:41:25,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:25,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41700269] [2020-12-22 07:41:25,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:25,477 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 07:41:25,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41700269] [2020-12-22 07:41:25,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:25,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:25,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407086104] [2020-12-22 07:41:25,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:25,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:25,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:25,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:25,479 INFO L87 Difference]: Start difference. First operand 84054 states and 131502 transitions. Second operand 3 states. [2020-12-22 07:41:30,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:30,429 INFO L93 Difference]: Finished difference Result 252086 states and 394386 transitions. [2020-12-22 07:41:30,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:30,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 07:41:30,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:30,743 INFO L225 Difference]: With dead ends: 252086 [2020-12-22 07:41:30,743 INFO L226 Difference]: Without dead ends: 168076 [2020-12-22 07:41:30,804 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 07:41:30,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168076 states. [2020-12-22 07:41:34,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168076 to 84058. [2020-12-22 07:41:34,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84058 states. [2020-12-22 07:41:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84058 states to 84058 states and 131506 transitions. [2020-12-22 07:41:34,897 INFO L78 Accepts]: Start accepts. Automaton has 84058 states and 131506 transitions. Word has length 80 [2020-12-22 07:41:34,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:34,897 INFO L481 AbstractCegarLoop]: Abstraction has 84058 states and 131506 transitions. [2020-12-22 07:41:34,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:41:34,898 INFO L276 IsEmpty]: Start isEmpty. Operand 84058 states and 131506 transitions. [2020-12-22 07:41:34,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 07:41:34,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:34,899 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, 1] [2020-12-22 07:41:34,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:41:34,899 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:34,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:34,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1530707325, now seen corresponding path program 1 times [2020-12-22 07:41:34,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:34,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668014547] [2020-12-22 07:41:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:34,998 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 07:41:34,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668014547] [2020-12-22 07:41:34,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:34,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:41:34,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229477542] [2020-12-22 07:41:34,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:41:35,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:35,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:41:35,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:41:35,000 INFO L87 Difference]: Start difference. First operand 84058 states and 131506 transitions. Second operand 4 states. [2020-12-22 07:41:40,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:40,187 INFO L93 Difference]: Finished difference Result 248426 states and 388114 transitions. [2020-12-22 07:41:40,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:41:40,188 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-12-22 07:41:40,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:40,638 INFO L225 Difference]: With dead ends: 248426 [2020-12-22 07:41:40,638 INFO L226 Difference]: Without dead ends: 164416 [2020-12-22 07:41:40,697 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 07:41:40,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164416 states. [2020-12-22 07:41:46,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164416 to 164414. [2020-12-22 07:41:46,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164414 states. [2020-12-22 07:41:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164414 states to 164414 states and 255112 transitions. [2020-12-22 07:41:47,444 INFO L78 Accepts]: Start accepts. Automaton has 164414 states and 255112 transitions. Word has length 81 [2020-12-22 07:41:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:41:47,445 INFO L481 AbstractCegarLoop]: Abstraction has 164414 states and 255112 transitions. [2020-12-22 07:41:47,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:41:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 164414 states and 255112 transitions. [2020-12-22 07:41:47,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:41:47,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:41:47,452 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:41:47,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:41:47,459 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:41:47,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:41:47,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1063976855, now seen corresponding path program 1 times [2020-12-22 07:41:47,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:41:47,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302869407] [2020-12-22 07:41:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:41:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:41:47,540 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 07:41:47,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302869407] [2020-12-22 07:41:47,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:41:47,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:41:47,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590209957] [2020-12-22 07:41:47,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:41:47,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:41:47,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:41:47,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:41:47,543 INFO L87 Difference]: Start difference. First operand 164414 states and 255112 transitions. Second operand 3 states. [2020-12-22 07:41:55,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:41:55,346 INFO L93 Difference]: Finished difference Result 399850 states and 623434 transitions. [2020-12-22 07:41:55,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:41:55,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:41:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:41:56,037 INFO L225 Difference]: With dead ends: 399850 [2020-12-22 07:41:56,037 INFO L226 Difference]: Without dead ends: 236000 [2020-12-22 07:41:56,171 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 07:41:56,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236000 states. [2020-12-22 07:42:05,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236000 to 225918. [2020-12-22 07:42:05,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225918 states. [2020-12-22 07:42:05,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225918 states to 225918 states and 348560 transitions. [2020-12-22 07:42:05,936 INFO L78 Accepts]: Start accepts. Automaton has 225918 states and 348560 transitions. Word has length 82 [2020-12-22 07:42:05,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:05,936 INFO L481 AbstractCegarLoop]: Abstraction has 225918 states and 348560 transitions. [2020-12-22 07:42:05,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:42:05,936 INFO L276 IsEmpty]: Start isEmpty. Operand 225918 states and 348560 transitions. [2020-12-22 07:42:05,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:42:05,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:05,939 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, 1, 1] [2020-12-22 07:42:05,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:42:05,939 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:05,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:05,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1085594423, now seen corresponding path program 1 times [2020-12-22 07:42:05,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:05,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432769714] [2020-12-22 07:42:05,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:06,006 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 07:42:06,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432769714] [2020-12-22 07:42:06,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:06,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:42:06,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31544632] [2020-12-22 07:42:06,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:42:06,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:06,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:42:06,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:42:06,010 INFO L87 Difference]: Start difference. First operand 225918 states and 348560 transitions. Second operand 3 states. [2020-12-22 07:42:20,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:20,998 INFO L93 Difference]: Finished difference Result 677330 states and 1045134 transitions. [2020-12-22 07:42:20,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:42:20,999 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 07:42:20,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:21,946 INFO L225 Difference]: With dead ends: 677330 [2020-12-22 07:42:21,947 INFO L226 Difference]: Without dead ends: 451744 [2020-12-22 07:42:22,498 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 07:42:22,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451744 states. [2020-12-22 07:42:34,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451744 to 225926. [2020-12-22 07:42:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225926 states. [2020-12-22 07:42:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225926 states to 225926 states and 348568 transitions. [2020-12-22 07:42:34,911 INFO L78 Accepts]: Start accepts. Automaton has 225926 states and 348568 transitions. Word has length 82 [2020-12-22 07:42:34,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:42:34,911 INFO L481 AbstractCegarLoop]: Abstraction has 225926 states and 348568 transitions. [2020-12-22 07:42:34,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:42:34,911 INFO L276 IsEmpty]: Start isEmpty. Operand 225926 states and 348568 transitions. [2020-12-22 07:42:34,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:42:34,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:42:34,914 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, 1, 1, 1] [2020-12-22 07:42:34,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:42:34,914 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:42:34,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:42:34,914 INFO L82 PathProgramCache]: Analyzing trace with hash 762927108, now seen corresponding path program 1 times [2020-12-22 07:42:34,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:42:34,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047664254] [2020-12-22 07:42:34,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:42:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:42:35,031 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 07:42:35,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047664254] [2020-12-22 07:42:35,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:42:35,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:42:35,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707111203] [2020-12-22 07:42:35,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:42:35,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:42:35,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:42:35,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:42:35,034 INFO L87 Difference]: Start difference. First operand 225926 states and 348568 transitions. Second operand 5 states. [2020-12-22 07:42:52,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:42:52,061 INFO L93 Difference]: Finished difference Result 639120 states and 985393 transitions. [2020-12-22 07:42:52,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:42:52,062 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-12-22 07:42:52,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:42:52,943 INFO L225 Difference]: With dead ends: 639120 [2020-12-22 07:42:52,943 INFO L226 Difference]: Without dead ends: 413282 [2020-12-22 07:42:53,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:42:53,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413282 states. [2020-12-22 07:43:11,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413282 to 413280. [2020-12-22 07:43:11,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413280 states. [2020-12-22 07:43:12,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413280 states to 413280 states and 631969 transitions. [2020-12-22 07:43:12,792 INFO L78 Accepts]: Start accepts. Automaton has 413280 states and 631969 transitions. Word has length 83 [2020-12-22 07:43:12,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:12,795 INFO L481 AbstractCegarLoop]: Abstraction has 413280 states and 631969 transitions. [2020-12-22 07:43:12,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:43:12,795 INFO L276 IsEmpty]: Start isEmpty. Operand 413280 states and 631969 transitions. [2020-12-22 07:43:12,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 07:43:12,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:12,803 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, 1, 1, 1] [2020-12-22 07:43:12,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 07:43:12,805 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:12,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:12,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1633117801, now seen corresponding path program 1 times [2020-12-22 07:43:12,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:12,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487524797] [2020-12-22 07:43:12,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:12,901 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 07:43:12,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487524797] [2020-12-22 07:43:12,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:12,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:12,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467781415] [2020-12-22 07:43:12,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:12,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:12,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:12,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:12,906 INFO L87 Difference]: Start difference. First operand 413280 states and 631969 transitions. Second operand 4 states. [2020-12-22 07:43:27,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:43:27,536 INFO L93 Difference]: Finished difference Result 734762 states and 1121587 transitions. [2020-12-22 07:43:27,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:43:27,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-22 07:43:27,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:43:28,436 INFO L225 Difference]: With dead ends: 734762 [2020-12-22 07:43:28,436 INFO L226 Difference]: Without dead ends: 321556 [2020-12-22 07:43:28,706 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 07:43:28,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321556 states. [2020-12-22 07:43:43,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321556 to 321556. [2020-12-22 07:43:43,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321556 states. [2020-12-22 07:43:44,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321556 states to 321556 states and 489721 transitions. [2020-12-22 07:43:44,381 INFO L78 Accepts]: Start accepts. Automaton has 321556 states and 489721 transitions. Word has length 83 [2020-12-22 07:43:44,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:43:44,382 INFO L481 AbstractCegarLoop]: Abstraction has 321556 states and 489721 transitions. [2020-12-22 07:43:44,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 07:43:44,382 INFO L276 IsEmpty]: Start isEmpty. Operand 321556 states and 489721 transitions. [2020-12-22 07:43:44,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 07:43:44,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:43:44,399 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, 1, 1, 1, 1] [2020-12-22 07:43:44,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 07:43:44,402 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:43:44,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:43:44,403 INFO L82 PathProgramCache]: Analyzing trace with hash 960344718, now seen corresponding path program 1 times [2020-12-22 07:43:44,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:43:44,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330765752] [2020-12-22 07:43:44,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:43:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:43:44,550 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 07:43:44,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330765752] [2020-12-22 07:43:44,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:43:44,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 07:43:44,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511293368] [2020-12-22 07:43:44,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 07:43:44,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:43:44,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 07:43:44,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 07:43:44,554 INFO L87 Difference]: Start difference. First operand 321556 states and 489721 transitions. Second operand 4 states. [2020-12-22 07:44:09,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:44:09,222 INFO L93 Difference]: Finished difference Result 845180 states and 1286070 transitions. [2020-12-22 07:44:09,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 07:44:09,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-12-22 07:44:09,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:44:10,358 INFO L225 Difference]: With dead ends: 845180 [2020-12-22 07:44:10,358 INFO L226 Difference]: Without dead ends: 523756 [2020-12-22 07:44:10,637 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 07:44:11,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523756 states.