/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/eca-rers2012/Problem17_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 02:20:56,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 02:20:56,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 02:20:56,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 02:20:56,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 02:20:56,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 02:20:56,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 02:20:56,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 02:20:56,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 02:20:56,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 02:20:56,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 02:20:56,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 02:20:56,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 02:20:56,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 02:20:56,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 02:20:56,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 02:20:56,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 02:20:56,660 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 02:20:56,688 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 02:20:56,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 02:20:56,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 02:20:56,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 02:20:56,690 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 02:20:56,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 02:20:56,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 02:20:56,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 02:20:56,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 02:20:56,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 02:20:56,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 02:20:56,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 02:20:56,692 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 02:20:56,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 02:20:56,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 02:20:56,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 02:20:56,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 02:20:56,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 02:20:56,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 02:20:56,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 02:20:56,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 02:20:56,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 02:20:56,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 02:20:56,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 02:20:56,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 02:20:56,694 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 02:20:57,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 02:20:57,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 02:20:57,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 02:20:57,090 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 02:20:57,091 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 02:20:57,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label00.c [2020-12-22 02:20:57,178 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8f6d30d/b499e7f292d44f75850d124892425ff9/FLAGd337d34f1 [2020-12-22 02:20:58,122 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 02:20:58,123 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label00.c [2020-12-22 02:20:58,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8f6d30d/b499e7f292d44f75850d124892425ff9/FLAGd337d34f1 [2020-12-22 02:20:58,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8f6d30d/b499e7f292d44f75850d124892425ff9 [2020-12-22 02:20:58,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 02:20:58,688 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 02:20:58,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 02:20:58,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 02:20:58,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 02:20:58,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:20:58" (1/1) ... [2020-12-22 02:20:58,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bc22fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:20:58, skipping insertion in model container [2020-12-22 02:20:58,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:20:58" (1/1) ... [2020-12-22 02:20:58,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 02:20:58,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 02:20:59,213 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label00.c[7994,8007] [2020-12-22 02:21:00,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:21:00,052 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 02:21:00,109 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label00.c[7994,8007] [2020-12-22 02:21:00,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 02:21:00,700 INFO L208 MainTranslator]: Completed translation [2020-12-22 02:21:00,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:00 WrapperNode [2020-12-22 02:21:00,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 02:21:00,704 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 02:21:00,704 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 02:21:00,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 02:21:00,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:00" (1/1) ... [2020-12-22 02:21:00,847 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:00" (1/1) ... [2020-12-22 02:21:01,228 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 02:21:01,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 02:21:01,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 02:21:01,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 02:21:01,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:00" (1/1) ... [2020-12-22 02:21:01,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:00" (1/1) ... [2020-12-22 02:21:01,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:00" (1/1) ... [2020-12-22 02:21:01,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:00" (1/1) ... [2020-12-22 02:21:01,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:00" (1/1) ... [2020-12-22 02:21:01,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:00" (1/1) ... [2020-12-22 02:21:01,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:00" (1/1) ... [2020-12-22 02:21:01,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 02:21:01,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 02:21:01,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 02:21:01,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 02:21:01,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:00" (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 02:21:01,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 02:21:01,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 02:21:01,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 02:21:01,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 02:21:06,120 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 02:21:06,120 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-22 02:21:06,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:21:06 BoogieIcfgContainer [2020-12-22 02:21:06,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 02:21:06,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 02:21:06,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 02:21:06,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 02:21:06,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:20:58" (1/3) ... [2020-12-22 02:21:06,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c16e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:21:06, skipping insertion in model container [2020-12-22 02:21:06,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:21:00" (2/3) ... [2020-12-22 02:21:06,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c16e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:21:06, skipping insertion in model container [2020-12-22 02:21:06,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:21:06" (3/3) ... [2020-12-22 02:21:06,133 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label00.c [2020-12-22 02:21:06,139 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 02:21:06,146 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 02:21:06,166 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 02:21:06,202 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 02:21:06,202 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 02:21:06,203 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 02:21:06,203 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 02:21:06,203 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 02:21:06,203 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 02:21:06,203 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 02:21:06,203 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 02:21:06,234 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states. [2020-12-22 02:21:06,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 02:21:06,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:06,245 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] [2020-12-22 02:21:06,245 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:06,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:06,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1425694346, now seen corresponding path program 1 times [2020-12-22 02:21:06,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:06,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986603795] [2020-12-22 02:21:06,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:06,614 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 02:21:06,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986603795] [2020-12-22 02:21:06,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:21:06,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:21:06,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575118823] [2020-12-22 02:21:06,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:21:06,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:06,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:21:06,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:21:06,647 INFO L87 Difference]: Start difference. First operand 590 states. Second operand 3 states. [2020-12-22 02:21:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:10,989 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2020-12-22 02:21:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:21:10,993 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 02:21:10,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:11,021 INFO L225 Difference]: With dead ends: 1644 [2020-12-22 02:21:11,021 INFO L226 Difference]: Without dead ends: 977 [2020-12-22 02:21:11,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:21:11,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2020-12-22 02:21:11,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2020-12-22 02:21:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 971 states. [2020-12-22 02:21:11,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2020-12-22 02:21:11,142 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 54 [2020-12-22 02:21:11,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:11,143 INFO L481 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2020-12-22 02:21:11,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:21:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2020-12-22 02:21:11,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 02:21:11,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:11,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:21:11,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 02:21:11,150 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:11,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:11,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1284076798, now seen corresponding path program 1 times [2020-12-22 02:21:11,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:11,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519443407] [2020-12-22 02:21:11,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:21:11,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519443407] [2020-12-22 02:21:11,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:21:11,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:21:11,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667677975] [2020-12-22 02:21:11,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:21:11,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:11,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:21:11,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:21:11,335 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand 3 states. [2020-12-22 02:21:16,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:16,050 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2020-12-22 02:21:16,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:21:16,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2020-12-22 02:21:16,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:16,067 INFO L225 Difference]: With dead ends: 2813 [2020-12-22 02:21:16,067 INFO L226 Difference]: Without dead ends: 1844 [2020-12-22 02:21:16,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:21:16,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2020-12-22 02:21:16,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2020-12-22 02:21:16,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1841 states. [2020-12-22 02:21:16,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2020-12-22 02:21:16,142 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 121 [2020-12-22 02:21:16,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:16,143 INFO L481 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2020-12-22 02:21:16,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:21:16,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2020-12-22 02:21:16,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 02:21:16,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:16,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:21:16,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 02:21:16,150 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:16,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:16,151 INFO L82 PathProgramCache]: Analyzing trace with hash 628146390, now seen corresponding path program 1 times [2020-12-22 02:21:16,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:16,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842949992] [2020-12-22 02:21:16,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:21:16,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842949992] [2020-12-22 02:21:16,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:21:16,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:21:16,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699848354] [2020-12-22 02:21:16,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:21:16,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:16,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:21:16,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:21:16,498 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand 4 states. [2020-12-22 02:21:23,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:23,853 INFO L93 Difference]: Finished difference Result 6767 states and 9259 transitions. [2020-12-22 02:21:23,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:21:23,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-12-22 02:21:23,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:23,883 INFO L225 Difference]: With dead ends: 6767 [2020-12-22 02:21:23,883 INFO L226 Difference]: Without dead ends: 4928 [2020-12-22 02:21:23,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:21:23,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2020-12-22 02:21:23,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 4875. [2020-12-22 02:21:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4875 states. [2020-12-22 02:21:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4875 states to 4875 states and 6271 transitions. [2020-12-22 02:21:24,010 INFO L78 Accepts]: Start accepts. Automaton has 4875 states and 6271 transitions. Word has length 124 [2020-12-22 02:21:24,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:24,011 INFO L481 AbstractCegarLoop]: Abstraction has 4875 states and 6271 transitions. [2020-12-22 02:21:24,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:21:24,011 INFO L276 IsEmpty]: Start isEmpty. Operand 4875 states and 6271 transitions. [2020-12-22 02:21:24,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-12-22 02:21:24,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:24,017 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:21:24,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 02:21:24,018 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:24,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:24,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1038884977, now seen corresponding path program 1 times [2020-12-22 02:21:24,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:24,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790386888] [2020-12-22 02:21:24,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-12-22 02:21:24,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790386888] [2020-12-22 02:21:24,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:21:24,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 02:21:24,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910753555] [2020-12-22 02:21:24,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:21:24,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:24,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:21:24,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:21:24,275 INFO L87 Difference]: Start difference. First operand 4875 states and 6271 transitions. Second operand 3 states. [2020-12-22 02:21:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:28,316 INFO L93 Difference]: Finished difference Result 14436 states and 18544 transitions. [2020-12-22 02:21:28,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:21:28,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 193 [2020-12-22 02:21:28,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:28,366 INFO L225 Difference]: With dead ends: 14436 [2020-12-22 02:21:28,366 INFO L226 Difference]: Without dead ends: 8277 [2020-12-22 02:21:28,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:21:28,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2020-12-22 02:21:28,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 6576. [2020-12-22 02:21:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6576 states. [2020-12-22 02:21:28,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6576 states to 6576 states and 7754 transitions. [2020-12-22 02:21:28,547 INFO L78 Accepts]: Start accepts. Automaton has 6576 states and 7754 transitions. Word has length 193 [2020-12-22 02:21:28,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:28,547 INFO L481 AbstractCegarLoop]: Abstraction has 6576 states and 7754 transitions. [2020-12-22 02:21:28,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:21:28,548 INFO L276 IsEmpty]: Start isEmpty. Operand 6576 states and 7754 transitions. [2020-12-22 02:21:28,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-12-22 02:21:28,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:28,551 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:21:28,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 02:21:28,552 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:28,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:28,552 INFO L82 PathProgramCache]: Analyzing trace with hash 2015197805, now seen corresponding path program 1 times [2020-12-22 02:21:28,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:28,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68356586] [2020-12-22 02:21:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 02:21:28,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68356586] [2020-12-22 02:21:28,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:21:28,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:21:28,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372021712] [2020-12-22 02:21:28,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:21:28,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:28,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:21:28,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:21:28,716 INFO L87 Difference]: Start difference. First operand 6576 states and 7754 transitions. Second operand 3 states. [2020-12-22 02:21:32,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:32,640 INFO L93 Difference]: Finished difference Result 16560 states and 19931 transitions. [2020-12-22 02:21:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:21:32,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 206 [2020-12-22 02:21:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:32,685 INFO L225 Difference]: With dead ends: 16560 [2020-12-22 02:21:32,685 INFO L226 Difference]: Without dead ends: 9986 [2020-12-22 02:21:32,699 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 02:21:32,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9986 states. [2020-12-22 02:21:32,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9986 to 9986. [2020-12-22 02:21:32,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9986 states. [2020-12-22 02:21:32,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9986 states to 9986 states and 11679 transitions. [2020-12-22 02:21:32,914 INFO L78 Accepts]: Start accepts. Automaton has 9986 states and 11679 transitions. Word has length 206 [2020-12-22 02:21:32,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:32,915 INFO L481 AbstractCegarLoop]: Abstraction has 9986 states and 11679 transitions. [2020-12-22 02:21:32,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:21:32,915 INFO L276 IsEmpty]: Start isEmpty. Operand 9986 states and 11679 transitions. [2020-12-22 02:21:32,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-12-22 02:21:32,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:32,919 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:21:32,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 02:21:32,920 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:32,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:32,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1777362264, now seen corresponding path program 1 times [2020-12-22 02:21:32,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:32,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415945646] [2020-12-22 02:21:32,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 02:21:33,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415945646] [2020-12-22 02:21:33,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:21:33,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:21:33,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580039184] [2020-12-22 02:21:33,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:21:33,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:33,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:21:33,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:21:33,132 INFO L87 Difference]: Start difference. First operand 9986 states and 11679 transitions. Second operand 3 states. [2020-12-22 02:21:37,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:37,796 INFO L93 Difference]: Finished difference Result 25067 states and 29587 transitions. [2020-12-22 02:21:37,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:21:37,798 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 208 [2020-12-22 02:21:37,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:37,840 INFO L225 Difference]: With dead ends: 25067 [2020-12-22 02:21:37,840 INFO L226 Difference]: Without dead ends: 15083 [2020-12-22 02:21:37,855 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 02:21:37,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15083 states. [2020-12-22 02:21:38,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15083 to 10384. [2020-12-22 02:21:38,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10384 states. [2020-12-22 02:21:38,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10384 states to 10384 states and 12098 transitions. [2020-12-22 02:21:38,049 INFO L78 Accepts]: Start accepts. Automaton has 10384 states and 12098 transitions. Word has length 208 [2020-12-22 02:21:38,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:38,050 INFO L481 AbstractCegarLoop]: Abstraction has 10384 states and 12098 transitions. [2020-12-22 02:21:38,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:21:38,050 INFO L276 IsEmpty]: Start isEmpty. Operand 10384 states and 12098 transitions. [2020-12-22 02:21:38,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-22 02:21:38,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:38,054 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:21:38,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 02:21:38,055 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:38,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:38,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1928280324, now seen corresponding path program 1 times [2020-12-22 02:21:38,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:38,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879851137] [2020-12-22 02:21:38,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-22 02:21:38,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879851137] [2020-12-22 02:21:38,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:21:38,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:21:38,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785970382] [2020-12-22 02:21:38,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:21:38,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:38,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:21:38,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:21:38,245 INFO L87 Difference]: Start difference. First operand 10384 states and 12098 transitions. Second operand 3 states. [2020-12-22 02:21:43,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:43,109 INFO L93 Difference]: Finished difference Result 25874 states and 30417 transitions. [2020-12-22 02:21:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:21:43,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 221 [2020-12-22 02:21:43,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:43,149 INFO L225 Difference]: With dead ends: 25874 [2020-12-22 02:21:43,150 INFO L226 Difference]: Without dead ends: 15492 [2020-12-22 02:21:43,165 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 02:21:43,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15492 states. [2020-12-22 02:21:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15492 to 13778. [2020-12-22 02:21:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13778 states. [2020-12-22 02:21:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13778 states to 13778 states and 16071 transitions. [2020-12-22 02:21:43,396 INFO L78 Accepts]: Start accepts. Automaton has 13778 states and 16071 transitions. Word has length 221 [2020-12-22 02:21:43,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:43,397 INFO L481 AbstractCegarLoop]: Abstraction has 13778 states and 16071 transitions. [2020-12-22 02:21:43,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:21:43,397 INFO L276 IsEmpty]: Start isEmpty. Operand 13778 states and 16071 transitions. [2020-12-22 02:21:43,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-12-22 02:21:43,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:43,403 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:21:43,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 02:21:43,403 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:43,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:43,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1694467582, now seen corresponding path program 1 times [2020-12-22 02:21:43,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:43,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815730489] [2020-12-22 02:21:43,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-22 02:21:43,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815730489] [2020-12-22 02:21:43,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:21:43,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:21:43,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625093151] [2020-12-22 02:21:43,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:21:43,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:43,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:21:43,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:21:43,685 INFO L87 Difference]: Start difference. First operand 13778 states and 16071 transitions. Second operand 3 states. [2020-12-22 02:21:48,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:48,851 INFO L93 Difference]: Finished difference Result 32234 states and 37932 transitions. [2020-12-22 02:21:48,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:21:48,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 253 [2020-12-22 02:21:48,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:48,891 INFO L225 Difference]: With dead ends: 32234 [2020-12-22 02:21:48,891 INFO L226 Difference]: Without dead ends: 18458 [2020-12-22 02:21:48,908 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 02:21:48,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18458 states. [2020-12-22 02:21:49,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18458 to 17176. [2020-12-22 02:21:49,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17176 states. [2020-12-22 02:21:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17176 states to 17176 states and 20324 transitions. [2020-12-22 02:21:49,180 INFO L78 Accepts]: Start accepts. Automaton has 17176 states and 20324 transitions. Word has length 253 [2020-12-22 02:21:49,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:49,180 INFO L481 AbstractCegarLoop]: Abstraction has 17176 states and 20324 transitions. [2020-12-22 02:21:49,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:21:49,181 INFO L276 IsEmpty]: Start isEmpty. Operand 17176 states and 20324 transitions. [2020-12-22 02:21:49,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-12-22 02:21:49,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:49,187 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:21:49,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 02:21:49,187 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:49,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:49,188 INFO L82 PathProgramCache]: Analyzing trace with hash 524926456, now seen corresponding path program 1 times [2020-12-22 02:21:49,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:49,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905362026] [2020-12-22 02:21:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-22 02:21:49,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905362026] [2020-12-22 02:21:49,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:21:49,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:21:49,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336765126] [2020-12-22 02:21:49,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:21:49,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:49,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:21:49,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:21:49,556 INFO L87 Difference]: Start difference. First operand 17176 states and 20324 transitions. Second operand 3 states. [2020-12-22 02:21:55,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:21:55,017 INFO L93 Difference]: Finished difference Result 43304 states and 51544 transitions. [2020-12-22 02:21:55,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:21:55,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 270 [2020-12-22 02:21:55,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:21:55,068 INFO L225 Difference]: With dead ends: 43304 [2020-12-22 02:21:55,068 INFO L226 Difference]: Without dead ends: 26130 [2020-12-22 02:21:55,089 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 02:21:55,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26130 states. [2020-12-22 02:21:55,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26130 to 24419. [2020-12-22 02:21:55,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24419 states. [2020-12-22 02:21:55,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24419 states to 24419 states and 28977 transitions. [2020-12-22 02:21:55,627 INFO L78 Accepts]: Start accepts. Automaton has 24419 states and 28977 transitions. Word has length 270 [2020-12-22 02:21:55,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:21:55,627 INFO L481 AbstractCegarLoop]: Abstraction has 24419 states and 28977 transitions. [2020-12-22 02:21:55,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:21:55,628 INFO L276 IsEmpty]: Start isEmpty. Operand 24419 states and 28977 transitions. [2020-12-22 02:21:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-12-22 02:21:55,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:21:55,635 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:21:55,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 02:21:55,635 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:21:55,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:21:55,636 INFO L82 PathProgramCache]: Analyzing trace with hash 937950836, now seen corresponding path program 1 times [2020-12-22 02:21:55,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:21:55,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518081575] [2020-12-22 02:21:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:21:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 242 proven. 70 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-22 02:21:55,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518081575] [2020-12-22 02:21:55,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156283002] [2020-12-22 02:21:55,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:21:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:21:56,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 02:21:56,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:21:56,506 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 02:21:56,558 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 02:21:56,743 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:21:56,932 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:21:57,149 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-22 02:21:57,208 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:21:57,321 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:21:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 242 proven. 70 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-12-22 02:21:58,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:21:58,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-12-22 02:21:58,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494241788] [2020-12-22 02:21:58,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:21:58,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:21:58,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:21:58,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:21:58,412 INFO L87 Difference]: Start difference. First operand 24419 states and 28977 transitions. Second operand 4 states. [2020-12-22 02:22:06,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:06,595 INFO L93 Difference]: Finished difference Result 57778 states and 68846 transitions. [2020-12-22 02:22:06,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:22:06,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 278 [2020-12-22 02:22:06,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:06,658 INFO L225 Difference]: With dead ends: 57778 [2020-12-22 02:22:06,658 INFO L226 Difference]: Without dead ends: 32511 [2020-12-22 02:22:06,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 276 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:22:06,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32511 states. [2020-12-22 02:22:07,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32511 to 32081. [2020-12-22 02:22:07,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32081 states. [2020-12-22 02:22:07,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32081 states to 32081 states and 37132 transitions. [2020-12-22 02:22:07,478 INFO L78 Accepts]: Start accepts. Automaton has 32081 states and 37132 transitions. Word has length 278 [2020-12-22 02:22:07,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:07,479 INFO L481 AbstractCegarLoop]: Abstraction has 32081 states and 37132 transitions. [2020-12-22 02:22:07,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:22:07,479 INFO L276 IsEmpty]: Start isEmpty. Operand 32081 states and 37132 transitions. [2020-12-22 02:22:07,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-12-22 02:22:07,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:07,485 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:22:07,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 02:22:07,701 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:07,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:07,702 INFO L82 PathProgramCache]: Analyzing trace with hash -595718805, now seen corresponding path program 1 times [2020-12-22 02:22:07,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:07,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141468900] [2020-12-22 02:22:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 02:22:07,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141468900] [2020-12-22 02:22:07,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:22:07,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:22:07,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335633600] [2020-12-22 02:22:07,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:22:07,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:07,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:22:07,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:22:07,952 INFO L87 Difference]: Start difference. First operand 32081 states and 37132 transitions. Second operand 3 states. [2020-12-22 02:22:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:14,125 INFO L93 Difference]: Finished difference Result 77800 states and 90462 transitions. [2020-12-22 02:22:14,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:22:14,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 286 [2020-12-22 02:22:14,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:14,188 INFO L225 Difference]: With dead ends: 77800 [2020-12-22 02:22:14,188 INFO L226 Difference]: Without dead ends: 45279 [2020-12-22 02:22:14,212 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 02:22:14,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45279 states. [2020-12-22 02:22:14,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45279 to 42289. [2020-12-22 02:22:14,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42289 states. [2020-12-22 02:22:15,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42289 states to 42289 states and 47781 transitions. [2020-12-22 02:22:15,040 INFO L78 Accepts]: Start accepts. Automaton has 42289 states and 47781 transitions. Word has length 286 [2020-12-22 02:22:15,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:15,041 INFO L481 AbstractCegarLoop]: Abstraction has 42289 states and 47781 transitions. [2020-12-22 02:22:15,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:22:15,041 INFO L276 IsEmpty]: Start isEmpty. Operand 42289 states and 47781 transitions. [2020-12-22 02:22:15,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-12-22 02:22:15,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:15,054 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:22:15,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 02:22:15,054 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:15,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:15,055 INFO L82 PathProgramCache]: Analyzing trace with hash 308755155, now seen corresponding path program 1 times [2020-12-22 02:22:15,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:15,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563544431] [2020-12-22 02:22:15,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-12-22 02:22:15,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563544431] [2020-12-22 02:22:15,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:22:15,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 02:22:15,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557631671] [2020-12-22 02:22:15,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 02:22:15,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:15,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 02:22:15,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:22:15,573 INFO L87 Difference]: Start difference. First operand 42289 states and 47781 transitions. Second operand 4 states. [2020-12-22 02:22:25,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:25,318 INFO L93 Difference]: Finished difference Result 112324 states and 127016 transitions. [2020-12-22 02:22:25,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 02:22:25,320 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 314 [2020-12-22 02:22:25,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:25,449 INFO L225 Difference]: With dead ends: 112324 [2020-12-22 02:22:25,449 INFO L226 Difference]: Without dead ends: 69185 [2020-12-22 02:22:25,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 02:22:25,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69185 states. [2020-12-22 02:22:26,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69185 to 68691. [2020-12-22 02:22:26,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68691 states. [2020-12-22 02:22:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68691 states to 68691 states and 76892 transitions. [2020-12-22 02:22:27,073 INFO L78 Accepts]: Start accepts. Automaton has 68691 states and 76892 transitions. Word has length 314 [2020-12-22 02:22:27,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:27,073 INFO L481 AbstractCegarLoop]: Abstraction has 68691 states and 76892 transitions. [2020-12-22 02:22:27,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 02:22:27,074 INFO L276 IsEmpty]: Start isEmpty. Operand 68691 states and 76892 transitions. [2020-12-22 02:22:27,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-12-22 02:22:27,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:27,090 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:22:27,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 02:22:27,090 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:27,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:27,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1738045230, now seen corresponding path program 1 times [2020-12-22 02:22:27,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:27,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102572444] [2020-12-22 02:22:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-12-22 02:22:27,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102572444] [2020-12-22 02:22:27,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:22:27,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:22:27,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507417276] [2020-12-22 02:22:27,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:22:27,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:27,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:22:27,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:22:27,542 INFO L87 Difference]: Start difference. First operand 68691 states and 76892 transitions. Second operand 3 states. [2020-12-22 02:22:33,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:33,610 INFO L93 Difference]: Finished difference Result 144219 states and 161370 transitions. [2020-12-22 02:22:33,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:22:33,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 329 [2020-12-22 02:22:33,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:33,703 INFO L225 Difference]: With dead ends: 144219 [2020-12-22 02:22:33,703 INFO L226 Difference]: Without dead ends: 74677 [2020-12-22 02:22:33,886 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 02:22:33,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74677 states. [2020-12-22 02:22:35,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74677 to 71661. [2020-12-22 02:22:35,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71661 states. [2020-12-22 02:22:35,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71661 states to 71661 states and 79625 transitions. [2020-12-22 02:22:35,196 INFO L78 Accepts]: Start accepts. Automaton has 71661 states and 79625 transitions. Word has length 329 [2020-12-22 02:22:35,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:35,198 INFO L481 AbstractCegarLoop]: Abstraction has 71661 states and 79625 transitions. [2020-12-22 02:22:35,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:22:35,198 INFO L276 IsEmpty]: Start isEmpty. Operand 71661 states and 79625 transitions. [2020-12-22 02:22:35,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-12-22 02:22:35,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:35,231 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:22:35,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 02:22:35,231 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:35,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:35,232 INFO L82 PathProgramCache]: Analyzing trace with hash -64556604, now seen corresponding path program 1 times [2020-12-22 02:22:35,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:35,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472787328] [2020-12-22 02:22:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 418 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-12-22 02:22:35,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472787328] [2020-12-22 02:22:35,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:22:35,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:22:35,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370361936] [2020-12-22 02:22:35,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:22:35,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:35,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:22:35,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:22:35,829 INFO L87 Difference]: Start difference. First operand 71661 states and 79625 transitions. Second operand 3 states. [2020-12-22 02:22:41,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:41,593 INFO L93 Difference]: Finished difference Result 147155 states and 163603 transitions. [2020-12-22 02:22:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:22:41,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 382 [2020-12-22 02:22:41,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:41,686 INFO L225 Difference]: With dead ends: 147155 [2020-12-22 02:22:41,686 INFO L226 Difference]: Without dead ends: 75921 [2020-12-22 02:22:41,715 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 02:22:41,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75921 states. [2020-12-22 02:22:42,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75921 to 75067. [2020-12-22 02:22:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75067 states. [2020-12-22 02:22:42,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75067 states to 75067 states and 82570 transitions. [2020-12-22 02:22:42,898 INFO L78 Accepts]: Start accepts. Automaton has 75067 states and 82570 transitions. Word has length 382 [2020-12-22 02:22:42,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:42,898 INFO L481 AbstractCegarLoop]: Abstraction has 75067 states and 82570 transitions. [2020-12-22 02:22:42,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:22:42,899 INFO L276 IsEmpty]: Start isEmpty. Operand 75067 states and 82570 transitions. [2020-12-22 02:22:42,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-12-22 02:22:42,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:42,913 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:22:42,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 02:22:42,913 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:42,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:42,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1050869018, now seen corresponding path program 1 times [2020-12-22 02:22:42,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:42,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610993313] [2020-12-22 02:22:42,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-22 02:22:43,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610993313] [2020-12-22 02:22:43,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:22:43,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:22:43,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660833509] [2020-12-22 02:22:43,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:22:43,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:43,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:22:43,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:22:43,482 INFO L87 Difference]: Start difference. First operand 75067 states and 82570 transitions. Second operand 3 states. [2020-12-22 02:22:50,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:50,027 INFO L93 Difference]: Finished difference Result 156523 states and 172410 transitions. [2020-12-22 02:22:50,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:22:50,029 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 396 [2020-12-22 02:22:50,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:50,115 INFO L225 Difference]: With dead ends: 156523 [2020-12-22 02:22:50,115 INFO L226 Difference]: Without dead ends: 80599 [2020-12-22 02:22:50,149 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 02:22:50,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80599 states. [2020-12-22 02:22:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80599 to 70780. [2020-12-22 02:22:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70780 states. [2020-12-22 02:22:51,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70780 states to 70780 states and 77887 transitions. [2020-12-22 02:22:51,239 INFO L78 Accepts]: Start accepts. Automaton has 70780 states and 77887 transitions. Word has length 396 [2020-12-22 02:22:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:51,240 INFO L481 AbstractCegarLoop]: Abstraction has 70780 states and 77887 transitions. [2020-12-22 02:22:51,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:22:51,240 INFO L276 IsEmpty]: Start isEmpty. Operand 70780 states and 77887 transitions. [2020-12-22 02:22:51,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2020-12-22 02:22:51,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:51,249 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:22:51,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 02:22:51,250 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:51,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:51,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1853316417, now seen corresponding path program 1 times [2020-12-22 02:22:51,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:51,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460375822] [2020-12-22 02:22:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:22:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 451 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-12-22 02:22:52,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460375822] [2020-12-22 02:22:52,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:22:52,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:22:52,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978857760] [2020-12-22 02:22:52,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:22:52,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:22:52,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:22:52,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:22:52,065 INFO L87 Difference]: Start difference. First operand 70780 states and 77887 transitions. Second operand 3 states. [2020-12-22 02:22:58,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:22:58,156 INFO L93 Difference]: Finished difference Result 146663 states and 161338 transitions. [2020-12-22 02:22:58,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:22:58,158 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 404 [2020-12-22 02:22:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:22:58,251 INFO L225 Difference]: With dead ends: 146663 [2020-12-22 02:22:58,251 INFO L226 Difference]: Without dead ends: 76310 [2020-12-22 02:22:58,294 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 02:22:58,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76310 states. [2020-12-22 02:22:59,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76310 to 74605. [2020-12-22 02:22:59,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74605 states. [2020-12-22 02:22:59,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74605 states to 74605 states and 81742 transitions. [2020-12-22 02:22:59,439 INFO L78 Accepts]: Start accepts. Automaton has 74605 states and 81742 transitions. Word has length 404 [2020-12-22 02:22:59,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:22:59,440 INFO L481 AbstractCegarLoop]: Abstraction has 74605 states and 81742 transitions. [2020-12-22 02:22:59,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:22:59,440 INFO L276 IsEmpty]: Start isEmpty. Operand 74605 states and 81742 transitions. [2020-12-22 02:22:59,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-12-22 02:22:59,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:22:59,451 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 02:22:59,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 02:22:59,451 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:22:59,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:22:59,452 INFO L82 PathProgramCache]: Analyzing trace with hash 340482704, now seen corresponding path program 1 times [2020-12-22 02:22:59,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:22:59,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216946165] [2020-12-22 02:22:59,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:22:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:23:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 370 proven. 52 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2020-12-22 02:23:00,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216946165] [2020-12-22 02:23:00,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517015885] [2020-12-22 02:23:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:23:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:23:00,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 02:23:00,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:23:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 433 proven. 82 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-22 02:23:02,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:23:02,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2020-12-22 02:23:02,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452672128] [2020-12-22 02:23:02,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 02:23:02,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:23:02,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 02:23:02,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 02:23:02,129 INFO L87 Difference]: Start difference. First operand 74605 states and 81742 transitions. Second operand 7 states. [2020-12-22 02:23:39,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:23:39,206 INFO L93 Difference]: Finished difference Result 170974 states and 186779 transitions. [2020-12-22 02:23:39,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 02:23:39,209 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 434 [2020-12-22 02:23:39,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:23:39,320 INFO L225 Difference]: With dead ends: 170974 [2020-12-22 02:23:39,321 INFO L226 Difference]: Without dead ends: 95521 [2020-12-22 02:23:39,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-22 02:23:39,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95521 states. [2020-12-22 02:23:40,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95521 to 86940. [2020-12-22 02:23:40,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86940 states. [2020-12-22 02:23:40,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86940 states to 86940 states and 95013 transitions. [2020-12-22 02:23:40,919 INFO L78 Accepts]: Start accepts. Automaton has 86940 states and 95013 transitions. Word has length 434 [2020-12-22 02:23:40,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:23:40,920 INFO L481 AbstractCegarLoop]: Abstraction has 86940 states and 95013 transitions. [2020-12-22 02:23:40,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 02:23:40,920 INFO L276 IsEmpty]: Start isEmpty. Operand 86940 states and 95013 transitions. [2020-12-22 02:23:40,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-12-22 02:23:40,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:23:40,933 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:23:41,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 02:23:41,134 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:23:41,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:23:41,135 INFO L82 PathProgramCache]: Analyzing trace with hash -429192576, now seen corresponding path program 1 times [2020-12-22 02:23:41,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:23:41,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242000276] [2020-12-22 02:23:41,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:23:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:23:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 755 backedges. 446 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2020-12-22 02:23:41,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242000276] [2020-12-22 02:23:41,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:23:41,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:23:41,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465650951] [2020-12-22 02:23:41,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:23:41,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:23:41,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:23:41,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:23:41,995 INFO L87 Difference]: Start difference. First operand 86940 states and 95013 transitions. Second operand 3 states. [2020-12-22 02:23:49,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:23:49,569 INFO L93 Difference]: Finished difference Result 173889 states and 190171 transitions. [2020-12-22 02:23:49,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:23:49,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 510 [2020-12-22 02:23:49,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:23:49,706 INFO L225 Difference]: With dead ends: 173889 [2020-12-22 02:23:49,706 INFO L226 Difference]: Without dead ends: 88226 [2020-12-22 02:23:49,767 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 02:23:49,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88226 states. [2020-12-22 02:23:51,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88226 to 87793. [2020-12-22 02:23:51,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87793 states. [2020-12-22 02:23:51,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87793 states to 87793 states and 95123 transitions. [2020-12-22 02:23:51,514 INFO L78 Accepts]: Start accepts. Automaton has 87793 states and 95123 transitions. Word has length 510 [2020-12-22 02:23:51,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:23:51,515 INFO L481 AbstractCegarLoop]: Abstraction has 87793 states and 95123 transitions. [2020-12-22 02:23:51,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:23:51,515 INFO L276 IsEmpty]: Start isEmpty. Operand 87793 states and 95123 transitions. [2020-12-22 02:23:51,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-12-22 02:23:51,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:23:51,533 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 02:23:51,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 02:23:51,533 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:23:51,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:23:51,534 INFO L82 PathProgramCache]: Analyzing trace with hash -45784992, now seen corresponding path program 1 times [2020-12-22 02:23:51,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:23:51,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037528555] [2020-12-22 02:23:51,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:23:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:23:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-12-22 02:23:52,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037528555] [2020-12-22 02:23:52,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 02:23:52,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 02:23:52,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661712842] [2020-12-22 02:23:52,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 02:23:52,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:23:52,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 02:23:52,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 02:23:52,299 INFO L87 Difference]: Start difference. First operand 87793 states and 95123 transitions. Second operand 3 states. [2020-12-22 02:24:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 02:24:01,182 INFO L93 Difference]: Finished difference Result 182382 states and 197908 transitions. [2020-12-22 02:24:01,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 02:24:01,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 510 [2020-12-22 02:24:01,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 02:24:01,375 INFO L225 Difference]: With dead ends: 182382 [2020-12-22 02:24:01,376 INFO L226 Difference]: Without dead ends: 94580 [2020-12-22 02:24:01,455 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 02:24:01,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94580 states. [2020-12-22 02:24:03,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94580 to 89055. [2020-12-22 02:24:03,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89055 states. [2020-12-22 02:24:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89055 states to 89055 states and 95861 transitions. [2020-12-22 02:24:03,452 INFO L78 Accepts]: Start accepts. Automaton has 89055 states and 95861 transitions. Word has length 510 [2020-12-22 02:24:03,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 02:24:03,452 INFO L481 AbstractCegarLoop]: Abstraction has 89055 states and 95861 transitions. [2020-12-22 02:24:03,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 02:24:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 89055 states and 95861 transitions. [2020-12-22 02:24:03,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2020-12-22 02:24:03,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 02:24:03,465 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:24:03,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 02:24:03,465 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 02:24:03,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 02:24:03,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1327215974, now seen corresponding path program 1 times [2020-12-22 02:24:03,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 02:24:03,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924120303] [2020-12-22 02:24:03,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 02:24:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:24:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 267 proven. 52 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 02:24:04,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924120303] [2020-12-22 02:24:04,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681000280] [2020-12-22 02:24:04,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 02:24:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 02:24:04,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 02:24:04,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 02:24:07,170 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:24:07,172 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 02:24:07,177 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 02:24:07,191 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 02:24:07,196 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 02:24:07,201 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:24:07,206 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:24:07,210 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:24:07,287 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:24:07,330 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:24:07,433 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:24:07,745 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:24:07,808 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:24:07,817 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 02:24:07,871 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:24:08,034 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:24:08,243 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:24:08,370 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:24:08,381 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 02:24:08,609 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:24:08,799 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:24:09,138 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 02:24:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 267 proven. 52 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 02:24:10,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 02:24:10,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 02:24:10,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176117260] [2020-12-22 02:24:10,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 02:24:10,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 02:24:10,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 02:24:10,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 02:24:10,886 INFO L87 Difference]: Start difference. First operand 89055 states and 95861 transitions. Second operand 6 states.