/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/eca-rers2012/Problem13_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 01:44:17,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 01:44:17,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 01:44:17,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 01:44:17,539 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 01:44:17,568 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 01:44:17,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 01:44:17,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 01:44:17,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 01:44:17,571 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 01:44:17,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 01:44:17,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 01:44:17,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 01:44:17,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 01:44:17,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 01:44:17,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 01:44:17,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 01:44:17,573 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 01:44:17,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 01:44:17,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 01:44:17,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 01:44:17,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 01:44:17,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 01:44:17,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 01:44:17,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 01:44:17,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 01:44:17,575 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 01:44:17,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 01:44:17,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 01:44:17,576 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 01:44:17,576 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 01:44:18,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 01:44:18,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 01:44:18,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 01:44:18,107 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 01:44:18,107 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 01:44:18,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label36.c [2020-12-22 01:44:18,212 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/deb395f77/37c9afc6012440f585975431ce35f7a7/FLAG881cf17a7 [2020-12-22 01:44:19,377 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 01:44:19,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label36.c [2020-12-22 01:44:19,429 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/deb395f77/37c9afc6012440f585975431ce35f7a7/FLAG881cf17a7 [2020-12-22 01:44:19,722 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/deb395f77/37c9afc6012440f585975431ce35f7a7 [2020-12-22 01:44:19,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 01:44:19,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 01:44:19,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 01:44:19,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 01:44:19,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 01:44:19,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:44:19" (1/1) ... [2020-12-22 01:44:19,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6be20b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:19, skipping insertion in model container [2020-12-22 01:44:19,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:44:19" (1/1) ... [2020-12-22 01:44:19,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 01:44:19,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 01:44:20,202 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label36.c[1933,1946] [2020-12-22 01:44:21,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:44:21,528 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 01:44:21,547 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label36.c[1933,1946] [2020-12-22 01:44:22,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 01:44:22,647 INFO L208 MainTranslator]: Completed translation [2020-12-22 01:44:22,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:22 WrapperNode [2020-12-22 01:44:22,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 01:44:22,649 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 01:44:22,650 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 01:44:22,651 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 01:44:22,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:22" (1/1) ... [2020-12-22 01:44:22,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:22" (1/1) ... [2020-12-22 01:44:23,463 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 01:44:23,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 01:44:23,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 01:44:23,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 01:44:23,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:22" (1/1) ... [2020-12-22 01:44:23,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:22" (1/1) ... [2020-12-22 01:44:23,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:22" (1/1) ... [2020-12-22 01:44:23,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:22" (1/1) ... [2020-12-22 01:44:24,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:22" (1/1) ... [2020-12-22 01:44:24,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:22" (1/1) ... [2020-12-22 01:44:24,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:22" (1/1) ... [2020-12-22 01:44:24,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 01:44:24,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 01:44:24,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 01:44:24,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 01:44:24,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 01:44:24,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 01:44:24,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 01:44:24,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 01:44:24,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 01:44:31,202 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 01:44:31,203 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 01:44:31,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:44:31 BoogieIcfgContainer [2020-12-22 01:44:31,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 01:44:31,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 01:44:31,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 01:44:31,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 01:44:31,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:44:19" (1/3) ... [2020-12-22 01:44:31,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752625f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:44:31, skipping insertion in model container [2020-12-22 01:44:31,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:22" (2/3) ... [2020-12-22 01:44:31,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752625f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:44:31, skipping insertion in model container [2020-12-22 01:44:31,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:44:31" (3/3) ... [2020-12-22 01:44:31,225 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label36.c [2020-12-22 01:44:31,233 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 01:44:31,240 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 01:44:31,266 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 01:44:31,319 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 01:44:31,320 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 01:44:31,320 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 01:44:31,320 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 01:44:31,320 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 01:44:31,320 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 01:44:31,320 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 01:44:31,321 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 01:44:31,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states. [2020-12-22 01:44:31,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 01:44:31,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:44:31,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:44:31,374 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:44:31,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:44:31,381 INFO L82 PathProgramCache]: Analyzing trace with hash -988188511, now seen corresponding path program 1 times [2020-12-22 01:44:31,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:44:31,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70341984] [2020-12-22 01:44:31,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:44:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:44:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:44:31,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70341984] [2020-12-22 01:44:31,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:44:31,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:44:31,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040628410] [2020-12-22 01:44:31,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:44:31,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:44:31,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:44:31,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:44:31,650 INFO L87 Difference]: Start difference. First operand 1098 states. Second operand 3 states. [2020-12-22 01:44:38,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:44:38,928 INFO L93 Difference]: Finished difference Result 3082 states and 5689 transitions. [2020-12-22 01:44:38,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:44:38,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-22 01:44:38,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:44:38,975 INFO L225 Difference]: With dead ends: 3082 [2020-12-22 01:44:38,975 INFO L226 Difference]: Without dead ends: 1899 [2020-12-22 01:44:38,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:44:39,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2020-12-22 01:44:39,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1894. [2020-12-22 01:44:39,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1894 states. [2020-12-22 01:44:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 3289 transitions. [2020-12-22 01:44:39,151 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 3289 transitions. Word has length 11 [2020-12-22 01:44:39,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:44:39,152 INFO L481 AbstractCegarLoop]: Abstraction has 1894 states and 3289 transitions. [2020-12-22 01:44:39,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:44:39,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 3289 transitions. [2020-12-22 01:44:39,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 01:44:39,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:44:39,155 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:44:39,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 01:44:39,156 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:44:39,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:44:39,157 INFO L82 PathProgramCache]: Analyzing trace with hash 749222458, now seen corresponding path program 1 times [2020-12-22 01:44:39,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:44:39,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806087521] [2020-12-22 01:44:39,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:44:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:44:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:44:39,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806087521] [2020-12-22 01:44:39,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:44:39,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:44:39,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199068488] [2020-12-22 01:44:39,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:44:39,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:44:39,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:44:39,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:44:39,467 INFO L87 Difference]: Start difference. First operand 1894 states and 3289 transitions. Second operand 3 states. [2020-12-22 01:44:46,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:44:46,029 INFO L93 Difference]: Finished difference Result 5384 states and 9441 transitions. [2020-12-22 01:44:46,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:44:46,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 01:44:46,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:44:46,056 INFO L225 Difference]: With dead ends: 5384 [2020-12-22 01:44:46,056 INFO L226 Difference]: Without dead ends: 3492 [2020-12-22 01:44:46,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:44:46,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2020-12-22 01:44:46,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 3491. [2020-12-22 01:44:46,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3491 states. [2020-12-22 01:44:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 5369 transitions. [2020-12-22 01:44:46,173 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 5369 transitions. Word has length 76 [2020-12-22 01:44:46,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:44:46,174 INFO L481 AbstractCegarLoop]: Abstraction has 3491 states and 5369 transitions. [2020-12-22 01:44:46,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:44:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 5369 transitions. [2020-12-22 01:44:46,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 01:44:46,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:44:46,181 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:44:46,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 01:44:46,182 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:44:46,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:44:46,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1737331553, now seen corresponding path program 1 times [2020-12-22 01:44:46,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:44:46,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954786092] [2020-12-22 01:44:46,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:44:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:44:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:44:46,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954786092] [2020-12-22 01:44:46,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:44:46,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 01:44:46,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374773988] [2020-12-22 01:44:46,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:44:46,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:44:46,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:44:46,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:44:46,422 INFO L87 Difference]: Start difference. First operand 3491 states and 5369 transitions. Second operand 3 states. [2020-12-22 01:44:53,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:44:53,153 INFO L93 Difference]: Finished difference Result 10169 states and 15700 transitions. [2020-12-22 01:44:53,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:44:53,157 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 01:44:53,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:44:53,198 INFO L225 Difference]: With dead ends: 10169 [2020-12-22 01:44:53,198 INFO L226 Difference]: Without dead ends: 6680 [2020-12-22 01:44:53,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:44:53,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2020-12-22 01:44:53,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 6669. [2020-12-22 01:44:53,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6669 states. [2020-12-22 01:44:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6669 states to 6669 states and 9170 transitions. [2020-12-22 01:44:53,383 INFO L78 Accepts]: Start accepts. Automaton has 6669 states and 9170 transitions. Word has length 78 [2020-12-22 01:44:53,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:44:53,393 INFO L481 AbstractCegarLoop]: Abstraction has 6669 states and 9170 transitions. [2020-12-22 01:44:53,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:44:53,393 INFO L276 IsEmpty]: Start isEmpty. Operand 6669 states and 9170 transitions. [2020-12-22 01:44:53,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 01:44:53,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:44:53,398 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:44:53,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 01:44:53,399 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:44:53,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:44:53,400 INFO L82 PathProgramCache]: Analyzing trace with hash 2003646253, now seen corresponding path program 1 times [2020-12-22 01:44:53,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:44:53,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265345702] [2020-12-22 01:44:53,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:44:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:44:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:44:53,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265345702] [2020-12-22 01:44:53,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:44:53,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:44:53,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507385558] [2020-12-22 01:44:53,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:44:53,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:44:53,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:44:53,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:44:53,643 INFO L87 Difference]: Start difference. First operand 6669 states and 9170 transitions. Second operand 3 states. [2020-12-22 01:45:01,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:45:01,206 INFO L93 Difference]: Finished difference Result 19629 states and 27006 transitions. [2020-12-22 01:45:01,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:45:01,211 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-12-22 01:45:01,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:45:01,278 INFO L225 Difference]: With dead ends: 19629 [2020-12-22 01:45:01,278 INFO L226 Difference]: Without dead ends: 12962 [2020-12-22 01:45:01,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:45:01,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12962 states. [2020-12-22 01:45:01,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12962 to 12957. [2020-12-22 01:45:01,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12957 states. [2020-12-22 01:45:01,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12957 states to 12957 states and 16487 transitions. [2020-12-22 01:45:01,581 INFO L78 Accepts]: Start accepts. Automaton has 12957 states and 16487 transitions. Word has length 122 [2020-12-22 01:45:01,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:45:01,584 INFO L481 AbstractCegarLoop]: Abstraction has 12957 states and 16487 transitions. [2020-12-22 01:45:01,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:45:01,584 INFO L276 IsEmpty]: Start isEmpty. Operand 12957 states and 16487 transitions. [2020-12-22 01:45:01,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 01:45:01,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:45:01,600 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:45:01,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 01:45:01,600 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:45:01,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:45:01,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1079018396, now seen corresponding path program 1 times [2020-12-22 01:45:01,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:45:01,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037387922] [2020-12-22 01:45:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:45:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:45:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:45:01,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037387922] [2020-12-22 01:45:01,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:45:01,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:45:01,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635857378] [2020-12-22 01:45:01,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:45:01,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:45:01,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:45:01,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:45:01,922 INFO L87 Difference]: Start difference. First operand 12957 states and 16487 transitions. Second operand 4 states. [2020-12-22 01:45:13,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:45:13,438 INFO L93 Difference]: Finished difference Result 29869 states and 37618 transitions. [2020-12-22 01:45:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:45:13,449 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 01:45:13,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:45:13,500 INFO L225 Difference]: With dead ends: 29869 [2020-12-22 01:45:13,500 INFO L226 Difference]: Without dead ends: 16914 [2020-12-22 01:45:13,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:45:13,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16914 states. [2020-12-22 01:45:13,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16914 to 16906. [2020-12-22 01:45:13,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16906 states. [2020-12-22 01:45:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16906 states to 16906 states and 20844 transitions. [2020-12-22 01:45:13,825 INFO L78 Accepts]: Start accepts. Automaton has 16906 states and 20844 transitions. Word has length 127 [2020-12-22 01:45:13,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:45:13,826 INFO L481 AbstractCegarLoop]: Abstraction has 16906 states and 20844 transitions. [2020-12-22 01:45:13,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:45:13,826 INFO L276 IsEmpty]: Start isEmpty. Operand 16906 states and 20844 transitions. [2020-12-22 01:45:13,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-12-22 01:45:13,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:45:13,831 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 01:45:13,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 01:45:13,831 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:45:13,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:45:13,832 INFO L82 PathProgramCache]: Analyzing trace with hash -660664880, now seen corresponding path program 1 times [2020-12-22 01:45:13,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:45:13,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861641004] [2020-12-22 01:45:13,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:45:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:45:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 01:45:14,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861641004] [2020-12-22 01:45:14,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:45:14,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:45:14,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319731768] [2020-12-22 01:45:14,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 01:45:14,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:45:14,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 01:45:14,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:45:14,249 INFO L87 Difference]: Start difference. First operand 16906 states and 20844 transitions. Second operand 4 states. [2020-12-22 01:45:34,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:45:34,683 INFO L93 Difference]: Finished difference Result 59223 states and 73998 transitions. [2020-12-22 01:45:34,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 01:45:34,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 247 [2020-12-22 01:45:34,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:45:34,809 INFO L225 Difference]: With dead ends: 59223 [2020-12-22 01:45:34,809 INFO L226 Difference]: Without dead ends: 43106 [2020-12-22 01:45:34,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 01:45:34,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43106 states. [2020-12-22 01:45:35,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43106 to 42184. [2020-12-22 01:45:35,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42184 states. [2020-12-22 01:45:35,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42184 states to 42184 states and 51056 transitions. [2020-12-22 01:45:35,853 INFO L78 Accepts]: Start accepts. Automaton has 42184 states and 51056 transitions. Word has length 247 [2020-12-22 01:45:35,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:45:35,854 INFO L481 AbstractCegarLoop]: Abstraction has 42184 states and 51056 transitions. [2020-12-22 01:45:35,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 01:45:35,854 INFO L276 IsEmpty]: Start isEmpty. Operand 42184 states and 51056 transitions. [2020-12-22 01:45:35,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-12-22 01:45:35,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:45:35,859 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 01:45:35,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 01:45:35,860 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:45:35,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:45:35,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1574808110, now seen corresponding path program 1 times [2020-12-22 01:45:35,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:45:35,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506547468] [2020-12-22 01:45:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:45:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:45:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-12-22 01:45:36,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506547468] [2020-12-22 01:45:36,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:45:36,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:45:36,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75912142] [2020-12-22 01:45:36,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:45:36,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:45:36,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:45:36,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:45:36,409 INFO L87 Difference]: Start difference. First operand 42184 states and 51056 transitions. Second operand 3 states. [2020-12-22 01:45:48,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:45:48,303 INFO L93 Difference]: Finished difference Result 117428 states and 142792 transitions. [2020-12-22 01:45:48,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:45:48,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 252 [2020-12-22 01:45:48,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:45:48,471 INFO L225 Difference]: With dead ends: 117428 [2020-12-22 01:45:48,472 INFO L226 Difference]: Without dead ends: 76033 [2020-12-22 01:45:48,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:45:48,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76033 states. [2020-12-22 01:45:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76033 to 74448. [2020-12-22 01:45:50,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74448 states. [2020-12-22 01:45:50,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74448 states to 74448 states and 86348 transitions. [2020-12-22 01:45:50,511 INFO L78 Accepts]: Start accepts. Automaton has 74448 states and 86348 transitions. Word has length 252 [2020-12-22 01:45:50,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:45:50,511 INFO L481 AbstractCegarLoop]: Abstraction has 74448 states and 86348 transitions. [2020-12-22 01:45:50,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:45:50,512 INFO L276 IsEmpty]: Start isEmpty. Operand 74448 states and 86348 transitions. [2020-12-22 01:45:50,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-12-22 01:45:50,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:45:50,527 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 01:45:50,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 01:45:50,528 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:45:50,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:45:50,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1312002571, now seen corresponding path program 1 times [2020-12-22 01:45:50,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:45:50,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006968978] [2020-12-22 01:45:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:45:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:45:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 31 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 01:45:51,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006968978] [2020-12-22 01:45:51,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541222047] [2020-12-22 01:45:51,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 01:45:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:45:51,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 01:45:51,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:45:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-12-22 01:45:53,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:45:53,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2020-12-22 01:45:53,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340226876] [2020-12-22 01:45:53,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:45:53,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:45:53,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:45:53,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 01:45:53,517 INFO L87 Difference]: Start difference. First operand 74448 states and 86348 transitions. Second operand 3 states. [2020-12-22 01:46:04,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:46:04,878 INFO L93 Difference]: Finished difference Result 144957 states and 168595 transitions. [2020-12-22 01:46:04,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:46:04,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 302 [2020-12-22 01:46:04,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:46:05,116 INFO L225 Difference]: With dead ends: 144957 [2020-12-22 01:46:05,117 INFO L226 Difference]: Without dead ends: 83903 [2020-12-22 01:46:05,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 01:46:05,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83903 states. [2020-12-22 01:46:06,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83903 to 82318. [2020-12-22 01:46:06,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82318 states. [2020-12-22 01:46:07,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82318 states to 82318 states and 93424 transitions. [2020-12-22 01:46:07,014 INFO L78 Accepts]: Start accepts. Automaton has 82318 states and 93424 transitions. Word has length 302 [2020-12-22 01:46:07,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:46:07,014 INFO L481 AbstractCegarLoop]: Abstraction has 82318 states and 93424 transitions. [2020-12-22 01:46:07,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:46:07,015 INFO L276 IsEmpty]: Start isEmpty. Operand 82318 states and 93424 transitions. [2020-12-22 01:46:07,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-12-22 01:46:07,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:46:07,024 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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 01:46:07,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-22 01:46:07,240 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:46:07,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:46:07,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1900088681, now seen corresponding path program 1 times [2020-12-22 01:46:07,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:46:07,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469962958] [2020-12-22 01:46:07,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:46:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:46:07,862 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2020-12-22 01:46:07,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469962958] [2020-12-22 01:46:07,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:46:07,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:46:07,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070822674] [2020-12-22 01:46:07,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:46:07,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:46:07,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:46:07,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:46:07,865 INFO L87 Difference]: Start difference. First operand 82318 states and 93424 transitions. Second operand 3 states. [2020-12-22 01:46:22,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:46:22,039 INFO L93 Difference]: Finished difference Result 195334 states and 224509 transitions. [2020-12-22 01:46:22,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:46:22,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-12-22 01:46:22,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:46:22,511 INFO L225 Difference]: With dead ends: 195334 [2020-12-22 01:46:22,511 INFO L226 Difference]: Without dead ends: 113805 [2020-12-22 01:46:22,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:46:22,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113805 states. [2020-12-22 01:46:24,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113805 to 112212. [2020-12-22 01:46:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112212 states. [2020-12-22 01:46:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112212 states to 112212 states and 127725 transitions. [2020-12-22 01:46:24,642 INFO L78 Accepts]: Start accepts. Automaton has 112212 states and 127725 transitions. Word has length 336 [2020-12-22 01:46:24,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:46:24,643 INFO L481 AbstractCegarLoop]: Abstraction has 112212 states and 127725 transitions. [2020-12-22 01:46:24,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:46:24,644 INFO L276 IsEmpty]: Start isEmpty. Operand 112212 states and 127725 transitions. [2020-12-22 01:46:24,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-12-22 01:46:24,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:46:24,652 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:46:24,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 01:46:24,652 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:46:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:46:24,653 INFO L82 PathProgramCache]: Analyzing trace with hash 951691822, now seen corresponding path program 1 times [2020-12-22 01:46:24,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:46:24,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967964072] [2020-12-22 01:46:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:46:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:46:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 277 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 01:46:25,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967964072] [2020-12-22 01:46:25,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:46:25,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:46:25,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075477237] [2020-12-22 01:46:25,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:46:25,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:46:25,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:46:25,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:46:25,414 INFO L87 Difference]: Start difference. First operand 112212 states and 127725 transitions. Second operand 3 states. [2020-12-22 01:46:40,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:46:40,743 INFO L93 Difference]: Finished difference Result 251195 states and 288279 transitions. [2020-12-22 01:46:40,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:46:40,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 408 [2020-12-22 01:46:40,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:46:41,014 INFO L225 Difference]: With dead ends: 251195 [2020-12-22 01:46:41,014 INFO L226 Difference]: Without dead ends: 138198 [2020-12-22 01:46:41,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:46:41,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138198 states. [2020-12-22 01:46:43,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138198 to 136608. [2020-12-22 01:46:43,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136608 states. [2020-12-22 01:46:43,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136608 states to 136608 states and 152974 transitions. [2020-12-22 01:46:43,685 INFO L78 Accepts]: Start accepts. Automaton has 136608 states and 152974 transitions. Word has length 408 [2020-12-22 01:46:43,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:46:43,686 INFO L481 AbstractCegarLoop]: Abstraction has 136608 states and 152974 transitions. [2020-12-22 01:46:43,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:46:43,686 INFO L276 IsEmpty]: Start isEmpty. Operand 136608 states and 152974 transitions. [2020-12-22 01:46:43,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-12-22 01:46:43,693 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:46:43,694 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:46:43,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 01:46:43,694 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:46:43,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:46:43,695 INFO L82 PathProgramCache]: Analyzing trace with hash -347704840, now seen corresponding path program 1 times [2020-12-22 01:46:43,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:46:43,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135179512] [2020-12-22 01:46:43,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:46:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:46:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 01:46:44,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135179512] [2020-12-22 01:46:44,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:46:44,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:46:44,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850682822] [2020-12-22 01:46:44,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:46:44,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:46:44,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:46:44,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:46:44,275 INFO L87 Difference]: Start difference. First operand 136608 states and 152974 transitions. Second operand 3 states. [2020-12-22 01:46:57,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:46:57,483 INFO L93 Difference]: Finished difference Result 272429 states and 305609 transitions. [2020-12-22 01:46:57,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:46:57,488 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 413 [2020-12-22 01:46:57,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:46:57,785 INFO L225 Difference]: With dead ends: 272429 [2020-12-22 01:46:57,786 INFO L226 Difference]: Without dead ends: 145274 [2020-12-22 01:46:57,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:46:58,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145274 states. [2020-12-22 01:47:00,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145274 to 145265. [2020-12-22 01:47:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145265 states. [2020-12-22 01:47:00,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145265 states to 145265 states and 161979 transitions. [2020-12-22 01:47:00,604 INFO L78 Accepts]: Start accepts. Automaton has 145265 states and 161979 transitions. Word has length 413 [2020-12-22 01:47:00,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:47:00,605 INFO L481 AbstractCegarLoop]: Abstraction has 145265 states and 161979 transitions. [2020-12-22 01:47:00,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:47:00,605 INFO L276 IsEmpty]: Start isEmpty. Operand 145265 states and 161979 transitions. [2020-12-22 01:47:00,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-12-22 01:47:00,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:47:00,622 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:47:00,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 01:47:00,622 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:47:00,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:47:00,623 INFO L82 PathProgramCache]: Analyzing trace with hash 871369198, now seen corresponding path program 1 times [2020-12-22 01:47:00,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:47:00,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274511142] [2020-12-22 01:47:00,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:47:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:47:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2020-12-22 01:47:01,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274511142] [2020-12-22 01:47:01,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:47:01,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:47:01,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194536769] [2020-12-22 01:47:01,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:47:01,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:47:01,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:47:01,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:47:01,726 INFO L87 Difference]: Start difference. First operand 145265 states and 161979 transitions. Second operand 3 states. [2020-12-22 01:47:16,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:47:16,138 INFO L93 Difference]: Finished difference Result 291334 states and 324780 transitions. [2020-12-22 01:47:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:47:16,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 422 [2020-12-22 01:47:16,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:47:16,373 INFO L225 Difference]: With dead ends: 291334 [2020-12-22 01:47:16,374 INFO L226 Difference]: Without dead ends: 145280 [2020-12-22 01:47:16,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:47:16,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145280 states. [2020-12-22 01:47:18,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145280 to 142113. [2020-12-22 01:47:18,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142113 states. [2020-12-22 01:47:18,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142113 states to 142113 states and 156072 transitions. [2020-12-22 01:47:18,952 INFO L78 Accepts]: Start accepts. Automaton has 142113 states and 156072 transitions. Word has length 422 [2020-12-22 01:47:18,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:47:18,953 INFO L481 AbstractCegarLoop]: Abstraction has 142113 states and 156072 transitions. [2020-12-22 01:47:18,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:47:18,953 INFO L276 IsEmpty]: Start isEmpty. Operand 142113 states and 156072 transitions. [2020-12-22 01:47:18,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2020-12-22 01:47:18,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:47:18,980 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:47:18,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 01:47:18,980 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:47:18,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:47:18,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1642317475, now seen corresponding path program 1 times [2020-12-22 01:47:18,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:47:18,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480149723] [2020-12-22 01:47:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:47:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:47:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 368 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2020-12-22 01:47:19,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480149723] [2020-12-22 01:47:19,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:47:19,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:47:19,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369028001] [2020-12-22 01:47:19,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:47:19,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:47:19,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:47:19,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:47:19,645 INFO L87 Difference]: Start difference. First operand 142113 states and 156072 transitions. Second operand 3 states. [2020-12-22 01:47:34,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:47:34,927 INFO L93 Difference]: Finished difference Result 268449 states and 296577 transitions. [2020-12-22 01:47:34,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:47:34,929 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 442 [2020-12-22 01:47:34,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:47:35,182 INFO L225 Difference]: With dead ends: 268449 [2020-12-22 01:47:35,182 INFO L226 Difference]: Without dead ends: 150748 [2020-12-22 01:47:35,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:47:35,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150748 states. [2020-12-22 01:47:37,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150748 to 150748. [2020-12-22 01:47:37,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150748 states. [2020-12-22 01:47:37,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150748 states to 150748 states and 164678 transitions. [2020-12-22 01:47:37,802 INFO L78 Accepts]: Start accepts. Automaton has 150748 states and 164678 transitions. Word has length 442 [2020-12-22 01:47:37,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:47:37,802 INFO L481 AbstractCegarLoop]: Abstraction has 150748 states and 164678 transitions. [2020-12-22 01:47:37,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:47:37,803 INFO L276 IsEmpty]: Start isEmpty. Operand 150748 states and 164678 transitions. [2020-12-22 01:47:37,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2020-12-22 01:47:37,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:47:37,811 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:47:37,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 01:47:37,811 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:47:37,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:47:37,812 INFO L82 PathProgramCache]: Analyzing trace with hash -805661133, now seen corresponding path program 1 times [2020-12-22 01:47:37,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:47:37,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277707300] [2020-12-22 01:47:37,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:47:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:47:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 44 proven. 100 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2020-12-22 01:47:39,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277707300] [2020-12-22 01:47:39,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925297958] [2020-12-22 01:47:39,337 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 01:47:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:47:39,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 01:47:39,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 01:47:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 757 trivial. 0 not checked. [2020-12-22 01:47:40,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 01:47:40,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2020-12-22 01:47:40,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668873950] [2020-12-22 01:47:40,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:47:40,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:47:40,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:47:40,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:47:40,905 INFO L87 Difference]: Start difference. First operand 150748 states and 164678 transitions. Second operand 3 states. [2020-12-22 01:47:53,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 01:47:53,131 INFO L93 Difference]: Finished difference Result 293610 states and 321186 transitions. [2020-12-22 01:47:53,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 01:47:53,134 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 454 [2020-12-22 01:47:53,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 01:47:53,358 INFO L225 Difference]: With dead ends: 293610 [2020-12-22 01:47:53,358 INFO L226 Difference]: Without dead ends: 150741 [2020-12-22 01:47:53,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 01:47:53,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150741 states. [2020-12-22 01:47:55,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150741 to 150736. [2020-12-22 01:47:55,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150736 states. [2020-12-22 01:47:55,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150736 states to 150736 states and 161690 transitions. [2020-12-22 01:47:55,519 INFO L78 Accepts]: Start accepts. Automaton has 150736 states and 161690 transitions. Word has length 454 [2020-12-22 01:47:55,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 01:47:55,520 INFO L481 AbstractCegarLoop]: Abstraction has 150736 states and 161690 transitions. [2020-12-22 01:47:55,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 01:47:55,520 INFO L276 IsEmpty]: Start isEmpty. Operand 150736 states and 161690 transitions. [2020-12-22 01:47:55,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-12-22 01:47:55,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 01:47:55,531 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 01:47:55,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 01:47:55,738 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 01:47:55,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 01:47:55,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1476211508, now seen corresponding path program 1 times [2020-12-22 01:47:55,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 01:47:55,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462141935] [2020-12-22 01:47:55,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 01:47:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 01:47:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2020-12-22 01:47:56,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462141935] [2020-12-22 01:47:56,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 01:47:56,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 01:47:56,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851135005] [2020-12-22 01:47:56,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 01:47:56,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 01:47:56,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 01:47:56,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 01:47:56,679 INFO L87 Difference]: Start difference. First operand 150736 states and 161690 transitions. Second operand 3 states.