/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/array-examples/standard_partition_original_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:38:52,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:38:52,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:38:52,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 21:38:52,555 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:38:52,611 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:38:52,612 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:38:52,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:38:52,618 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:38:52,618 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:38:52,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:38:52,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:38:52,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:38:52,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:38:52,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:38:52,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:38:52,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:38:52,622 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:38:52,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:38:52,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:38:52,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:38:52,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:38:52,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:38:52,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:38:52,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:38:52,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:38:52,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:38:52,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:38:52,625 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:38:52,626 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:38:52,626 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:38:53,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:38:53,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:38:53,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:38:53,128 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:38:53,129 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:38:53,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_original_ground.i [2020-12-21 21:38:53,224 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/854137e62/9bb82048ae1a4f51bb24edf2f4a6a9d7/FLAGe3033bac9 [2020-12-21 21:38:53,793 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:38:53,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_original_ground.i [2020-12-21 21:38:53,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/854137e62/9bb82048ae1a4f51bb24edf2f4a6a9d7/FLAGe3033bac9 [2020-12-21 21:38:54,121 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/854137e62/9bb82048ae1a4f51bb24edf2f4a6a9d7 [2020-12-21 21:38:54,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:38:54,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:38:54,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:38:54,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:38:54,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:38:54,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:38:54" (1/1) ... [2020-12-21 21:38:54,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49b22d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:54, skipping insertion in model container [2020-12-21 21:38:54,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:38:54" (1/1) ... [2020-12-21 21:38:54,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:38:54,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:38:54,336 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/array-examples/standard_partition_original_ground.i[827,840] [2020-12-21 21:38:54,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:38:54,381 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:38:54,405 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/array-examples/standard_partition_original_ground.i[827,840] [2020-12-21 21:38:54,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:38:54,467 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:38:54,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:54 WrapperNode [2020-12-21 21:38:54,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:38:54,471 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:38:54,471 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:38:54,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:38:54,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:54" (1/1) ... [2020-12-21 21:38:54,498 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:54" (1/1) ... [2020-12-21 21:38:54,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:38:54,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:38:54,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:38:54,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:38:54,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:54" (1/1) ... [2020-12-21 21:38:54,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:54" (1/1) ... [2020-12-21 21:38:54,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:54" (1/1) ... [2020-12-21 21:38:54,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:54" (1/1) ... [2020-12-21 21:38:54,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:54" (1/1) ... [2020-12-21 21:38:54,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:54" (1/1) ... [2020-12-21 21:38:54,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:54" (1/1) ... [2020-12-21 21:38:54,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:38:54,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:38:54,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:38:54,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:38:54,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:54" (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 [2020-12-21 21:38:54,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:38:54,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:38:54,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:38:54,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:38:54,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:38:54,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:38:54,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:38:55,276 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:38:55,276 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-21 21:38:55,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:38:55 BoogieIcfgContainer [2020-12-21 21:38:55,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:38:55,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:38:55,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:38:55,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:38:55,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:38:54" (1/3) ... [2020-12-21 21:38:55,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3424ae9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:38:55, skipping insertion in model container [2020-12-21 21:38:55,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:54" (2/3) ... [2020-12-21 21:38:55,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3424ae9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:38:55, skipping insertion in model container [2020-12-21 21:38:55,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:38:55" (3/3) ... [2020-12-21 21:38:55,288 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_original_ground.i [2020-12-21 21:38:55,297 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:38:55,302 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-21 21:38:55,337 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-21 21:38:55,369 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:38:55,369 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:38:55,369 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:38:55,370 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:38:55,370 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:38:55,370 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:38:55,370 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:38:55,370 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:38:55,387 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-21 21:38:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-21 21:38:55,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:55,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:55,395 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:55,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:55,402 INFO L82 PathProgramCache]: Analyzing trace with hash 227193477, now seen corresponding path program 1 times [2020-12-21 21:38:55,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:55,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115016156] [2020-12-21 21:38:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:38:55,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115016156] [2020-12-21 21:38:55,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:38:55,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:38:55,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828169011] [2020-12-21 21:38:55,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:38:55,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:55,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:38:55,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:38:55,641 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-12-21 21:38:55,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:55,662 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2020-12-21 21:38:55,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:38:55,663 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-21 21:38:55,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:55,673 INFO L225 Difference]: With dead ends: 46 [2020-12-21 21:38:55,673 INFO L226 Difference]: Without dead ends: 21 [2020-12-21 21:38:55,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:38:55,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-21 21:38:55,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-21 21:38:55,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-21 21:38:55,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-21 21:38:55,720 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 8 [2020-12-21 21:38:55,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:55,721 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-21 21:38:55,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:38:55,721 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-21 21:38:55,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-21 21:38:55,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:55,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:55,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:38:55,722 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:55,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:55,723 INFO L82 PathProgramCache]: Analyzing trace with hash 217034746, now seen corresponding path program 1 times [2020-12-21 21:38:55,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:55,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663710898] [2020-12-21 21:38:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:38:55,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663710898] [2020-12-21 21:38:55,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:38:55,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:38:55,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732825280] [2020-12-21 21:38:55,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:38:55,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:55,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:38:55,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:38:55,818 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2020-12-21 21:38:55,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:55,838 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2020-12-21 21:38:55,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:38:55,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-21 21:38:55,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:55,840 INFO L225 Difference]: With dead ends: 40 [2020-12-21 21:38:55,840 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 21:38:55,842 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 [2020-12-21 21:38:55,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 21:38:55,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-21 21:38:55,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-21 21:38:55,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-21 21:38:55,851 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 8 [2020-12-21 21:38:55,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:55,851 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-21 21:38:55,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:38:55,851 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-21 21:38:55,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 21:38:55,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:55,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:55,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:38:55,855 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:55,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1440932604, now seen corresponding path program 1 times [2020-12-21 21:38:55,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:55,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828725197] [2020-12-21 21:38:55,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:38:55,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828725197] [2020-12-21 21:38:55,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:38:55,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:38:55,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321470103] [2020-12-21 21:38:55,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:38:55,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:55,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:38:55,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:38:55,954 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2020-12-21 21:38:55,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:55,980 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-12-21 21:38:55,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:38:55,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-21 21:38:55,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:55,982 INFO L225 Difference]: With dead ends: 39 [2020-12-21 21:38:55,982 INFO L226 Difference]: Without dead ends: 25 [2020-12-21 21:38:55,983 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 [2020-12-21 21:38:55,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-21 21:38:55,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-12-21 21:38:55,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 21:38:55,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-21 21:38:55,988 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2020-12-21 21:38:55,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:55,989 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-21 21:38:55,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:38:55,989 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-21 21:38:55,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 21:38:55,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:55,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:55,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 21:38:55,990 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:55,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:55,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1060419033, now seen corresponding path program 1 times [2020-12-21 21:38:55,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:55,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377682577] [2020-12-21 21:38:55,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:38:56,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377682577] [2020-12-21 21:38:56,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213513390] [2020-12-21 21:38:56,074 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 [2020-12-21 21:38:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:56,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:38:56,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:38:56,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:56,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:38:56,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094365633] [2020-12-21 21:38:56,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:38:56,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:56,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:38:56,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:38:56,240 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-12-21 21:38:56,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:56,268 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-12-21 21:38:56,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:38:56,269 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-21 21:38:56,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:56,270 INFO L225 Difference]: With dead ends: 44 [2020-12-21 21:38:56,271 INFO L226 Difference]: Without dead ends: 26 [2020-12-21 21:38:56,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:38:56,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-21 21:38:56,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-21 21:38:56,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-21 21:38:56,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-21 21:38:56,277 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 13 [2020-12-21 21:38:56,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:56,278 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-21 21:38:56,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:38:56,278 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-21 21:38:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 21:38:56,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:56,279 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:56,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:56,496 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:56,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:56,497 INFO L82 PathProgramCache]: Analyzing trace with hash 575252581, now seen corresponding path program 2 times [2020-12-21 21:38:56,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:56,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502726826] [2020-12-21 21:38:56,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:38:56,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502726826] [2020-12-21 21:38:56,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497758529] [2020-12-21 21:38:56,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-21 21:38:56,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:38:56,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:56,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:38:56,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:38:56,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:56,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-21 21:38:56,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978540575] [2020-12-21 21:38:56,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:38:56,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:56,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:38:56,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:38:56,813 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2020-12-21 21:38:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:56,956 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-12-21 21:38:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:38:56,959 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-21 21:38:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:56,960 INFO L225 Difference]: With dead ends: 51 [2020-12-21 21:38:56,960 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 21:38:56,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:38:56,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 21:38:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-12-21 21:38:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 21:38:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-12-21 21:38:56,973 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 15 [2020-12-21 21:38:56,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:56,973 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-12-21 21:38:56,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:38:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-12-21 21:38:56,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 21:38:56,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:56,977 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:57,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:57,192 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:57,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:57,193 INFO L82 PathProgramCache]: Analyzing trace with hash -621086560, now seen corresponding path program 3 times [2020-12-21 21:38:57,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:57,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148018209] [2020-12-21 21:38:57,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:38:57,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148018209] [2020-12-21 21:38:57,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039904570] [2020-12-21 21:38:57,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-12-21 21:38:57,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:38:57,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:57,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:38:57,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 21:38:57,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:57,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-21 21:38:57,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400133480] [2020-12-21 21:38:57,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:38:57,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:57,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:38:57,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:38:57,447 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 9 states. [2020-12-21 21:38:57,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:57,593 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2020-12-21 21:38:57,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:38:57,594 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-12-21 21:38:57,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:57,595 INFO L225 Difference]: With dead ends: 59 [2020-12-21 21:38:57,595 INFO L226 Difference]: Without dead ends: 38 [2020-12-21 21:38:57,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:38:57,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-21 21:38:57,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-12-21 21:38:57,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-21 21:38:57,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-12-21 21:38:57,605 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 20 [2020-12-21 21:38:57,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:57,606 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-12-21 21:38:57,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:38:57,606 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-12-21 21:38:57,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 21:38:57,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:57,607 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:57,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:57,821 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:57,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:57,822 INFO L82 PathProgramCache]: Analyzing trace with hash 864930497, now seen corresponding path program 4 times [2020-12-21 21:38:57,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:57,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264323394] [2020-12-21 21:38:57,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:38:57,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264323394] [2020-12-21 21:38:57,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433822072] [2020-12-21 21:38:57,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:57,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:38:57,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:57,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:38:57,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:38:58,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:58,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:38:58,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526553057] [2020-12-21 21:38:58,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:38:58,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:58,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:38:58,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:38:58,038 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 8 states. [2020-12-21 21:38:58,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:58,070 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2020-12-21 21:38:58,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:38:58,072 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-12-21 21:38:58,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:58,073 INFO L225 Difference]: With dead ends: 62 [2020-12-21 21:38:58,074 INFO L226 Difference]: Without dead ends: 38 [2020-12-21 21:38:58,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:38:58,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-21 21:38:58,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-21 21:38:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-21 21:38:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-12-21 21:38:58,080 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2020-12-21 21:38:58,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:58,081 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-12-21 21:38:58,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:38:58,081 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-12-21 21:38:58,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 21:38:58,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:58,082 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:58,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:58,297 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:58,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:58,298 INFO L82 PathProgramCache]: Analyzing trace with hash 673889279, now seen corresponding path program 5 times [2020-12-21 21:38:58,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:58,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059203808] [2020-12-21 21:38:58,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:38:58,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059203808] [2020-12-21 21:38:58,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967764223] [2020-12-21 21:38:58,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:58,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 21:38:58,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:58,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:38:58,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-21 21:38:58,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:58,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-21 21:38:58,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000019449] [2020-12-21 21:38:58,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:38:58,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:58,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:38:58,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:38:58,668 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 12 states. [2020-12-21 21:38:58,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:58,829 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2020-12-21 21:38:58,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:38:58,829 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-12-21 21:38:58,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:58,833 INFO L225 Difference]: With dead ends: 69 [2020-12-21 21:38:58,834 INFO L226 Difference]: Without dead ends: 45 [2020-12-21 21:38:58,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:38:58,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-21 21:38:58,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-12-21 21:38:58,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-21 21:38:58,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-12-21 21:38:58,851 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 27 [2020-12-21 21:38:58,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:58,852 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-12-21 21:38:58,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:38:58,852 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-12-21 21:38:58,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 21:38:58,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:58,854 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:59,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:59,069 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:59,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:59,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1905765434, now seen corresponding path program 6 times [2020-12-21 21:38:59,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:59,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156272696] [2020-12-21 21:38:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:59,170 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-21 21:38:59,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156272696] [2020-12-21 21:38:59,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985239498] [2020-12-21 21:38:59,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:59,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:38:59,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:59,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:38:59,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:38:59,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:59,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-21 21:38:59,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437668979] [2020-12-21 21:38:59,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:38:59,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:59,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:38:59,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:38:59,421 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 14 states. [2020-12-21 21:38:59,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:59,591 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2020-12-21 21:38:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:38:59,592 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-12-21 21:38:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:59,593 INFO L225 Difference]: With dead ends: 77 [2020-12-21 21:38:59,593 INFO L226 Difference]: Without dead ends: 50 [2020-12-21 21:38:59,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:38:59,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-21 21:38:59,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-12-21 21:38:59,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-21 21:38:59,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-12-21 21:38:59,599 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 32 [2020-12-21 21:38:59,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:59,599 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-12-21 21:38:59,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:38:59,599 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-12-21 21:38:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-21 21:38:59,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:59,601 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:59,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:59,816 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:59,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1857202395, now seen corresponding path program 7 times [2020-12-21 21:38:59,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:59,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237163624] [2020-12-21 21:38:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:38:59,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237163624] [2020-12-21 21:38:59,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048035027] [2020-12-21 21:38:59,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:00,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:39:00,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:39:00,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:00,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:39:00,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105329639] [2020-12-21 21:39:00,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:39:00,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:00,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:39:00,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:39:00,098 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 11 states. [2020-12-21 21:39:00,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:00,134 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2020-12-21 21:39:00,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:39:00,134 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-12-21 21:39:00,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:00,135 INFO L225 Difference]: With dead ends: 80 [2020-12-21 21:39:00,135 INFO L226 Difference]: Without dead ends: 50 [2020-12-21 21:39:00,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:39:00,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-21 21:39:00,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-21 21:39:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-21 21:39:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-12-21 21:39:00,142 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 37 [2020-12-21 21:39:00,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:00,142 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-12-21 21:39:00,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:39:00,142 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-12-21 21:39:00,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 21:39:00,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:00,144 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:00,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 21:39:00,359 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:00,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:00,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1982442777, now seen corresponding path program 8 times [2020-12-21 21:39:00,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:00,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352629176] [2020-12-21 21:39:00,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:39:00,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352629176] [2020-12-21 21:39:00,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888180354] [2020-12-21 21:39:00,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:00,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:39:00,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:00,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:39:00,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:39:00,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:00,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:39:00,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790460684] [2020-12-21 21:39:00,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:39:00,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:00,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:39:00,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:39:00,599 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 12 states. [2020-12-21 21:39:00,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:00,641 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2020-12-21 21:39:00,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:39:00,641 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-12-21 21:39:00,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:00,642 INFO L225 Difference]: With dead ends: 82 [2020-12-21 21:39:00,642 INFO L226 Difference]: Without dead ends: 52 [2020-12-21 21:39:00,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:39:00,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-21 21:39:00,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-21 21:39:00,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-21 21:39:00,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2020-12-21 21:39:00,648 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 39 [2020-12-21 21:39:00,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:00,648 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2020-12-21 21:39:00,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:39:00,649 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2020-12-21 21:39:00,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:39:00,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:00,650 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:00,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 21:39:00,866 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:00,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:00,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2079365591, now seen corresponding path program 9 times [2020-12-21 21:39:00,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:00,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449833517] [2020-12-21 21:39:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:39:01,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449833517] [2020-12-21 21:39:01,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541897073] [2020-12-21 21:39:01,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:01,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:39:01,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:01,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:39:01,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-21 21:39:01,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:01,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-12-21 21:39:01,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731160421] [2020-12-21 21:39:01,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:39:01,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:01,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:39:01,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:39:01,278 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 18 states. [2020-12-21 21:39:01,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:01,510 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2020-12-21 21:39:01,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:39:01,511 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-12-21 21:39:01,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:01,512 INFO L225 Difference]: With dead ends: 89 [2020-12-21 21:39:01,512 INFO L226 Difference]: Without dead ends: 59 [2020-12-21 21:39:01,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:39:01,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-21 21:39:01,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-12-21 21:39:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 21:39:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-12-21 21:39:01,518 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 41 [2020-12-21 21:39:01,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:01,519 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-12-21 21:39:01,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:39:01,519 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-12-21 21:39:01,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 21:39:01,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:01,520 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:01,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:01,736 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:01,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:01,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1197294738, now seen corresponding path program 10 times [2020-12-21 21:39:01,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:01,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731577287] [2020-12-21 21:39:01,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:39:01,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731577287] [2020-12-21 21:39:01,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029159825] [2020-12-21 21:39:01,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:02,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:39:02,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:02,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:39:02,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:39:02,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:02,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:39:02,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148263702] [2020-12-21 21:39:02,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:39:02,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:02,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:39:02,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:39:02,101 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 14 states. [2020-12-21 21:39:02,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:02,148 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2020-12-21 21:39:02,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:39:02,149 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-12-21 21:39:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:02,150 INFO L225 Difference]: With dead ends: 92 [2020-12-21 21:39:02,150 INFO L226 Difference]: Without dead ends: 59 [2020-12-21 21:39:02,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:39:02,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-21 21:39:02,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-12-21 21:39:02,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-21 21:39:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-12-21 21:39:02,158 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 46 [2020-12-21 21:39:02,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:02,159 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-12-21 21:39:02,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:39:02,159 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-12-21 21:39:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-21 21:39:02,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:02,160 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:02,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:02,368 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:02,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:02,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1989778672, now seen corresponding path program 11 times [2020-12-21 21:39:02,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:02,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211173730] [2020-12-21 21:39:02,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:39:02,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211173730] [2020-12-21 21:39:02,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283590275] [2020-12-21 21:39:02,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:03,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 21:39:03,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:03,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:39:03,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:39:03,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:03,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:39:03,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569002506] [2020-12-21 21:39:03,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:39:03,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:03,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:39:03,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:39:03,209 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 15 states. [2020-12-21 21:39:03,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:03,261 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2020-12-21 21:39:03,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:39:03,261 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-12-21 21:39:03,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:03,262 INFO L225 Difference]: With dead ends: 94 [2020-12-21 21:39:03,262 INFO L226 Difference]: Without dead ends: 61 [2020-12-21 21:39:03,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:39:03,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-21 21:39:03,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-12-21 21:39:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-21 21:39:03,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-12-21 21:39:03,267 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 48 [2020-12-21 21:39:03,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:03,268 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-12-21 21:39:03,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:39:03,268 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-12-21 21:39:03,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-21 21:39:03,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:03,269 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:03,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:39:03,481 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:03,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:03,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1839323662, now seen corresponding path program 12 times [2020-12-21 21:39:03,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:03,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459200982] [2020-12-21 21:39:03,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:39:03,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459200982] [2020-12-21 21:39:03,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330256748] [2020-12-21 21:39:03,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:04,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:39:04,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:04,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:39:04,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-21 21:39:04,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:04,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2020-12-21 21:39:04,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105679872] [2020-12-21 21:39:04,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 21:39:04,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:04,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 21:39:04,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:39:04,477 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 22 states. [2020-12-21 21:39:04,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:04,801 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2020-12-21 21:39:04,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:39:04,802 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-12-21 21:39:04,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:04,803 INFO L225 Difference]: With dead ends: 101 [2020-12-21 21:39:04,803 INFO L226 Difference]: Without dead ends: 68 [2020-12-21 21:39:04,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=426, Invalid=764, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:39:04,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-21 21:39:04,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-12-21 21:39:04,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-21 21:39:04,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-12-21 21:39:04,809 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 50 [2020-12-21 21:39:04,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:04,809 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-12-21 21:39:04,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 21:39:04,809 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-12-21 21:39:04,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-21 21:39:04,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:04,810 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:05,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:39:05,026 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:05,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:05,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1995662255, now seen corresponding path program 13 times [2020-12-21 21:39:05,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:05,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434272738] [2020-12-21 21:39:05,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:39:05,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434272738] [2020-12-21 21:39:05,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261430281] [2020-12-21 21:39:05,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:05,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:39:05,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:39:05,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:05,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:39:05,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830313440] [2020-12-21 21:39:05,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:39:05,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:05,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:39:05,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:39:05,359 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 17 states. [2020-12-21 21:39:05,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:05,414 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-12-21 21:39:05,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:39:05,415 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 55 [2020-12-21 21:39:05,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:05,415 INFO L225 Difference]: With dead ends: 104 [2020-12-21 21:39:05,416 INFO L226 Difference]: Without dead ends: 68 [2020-12-21 21:39:05,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:39:05,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-21 21:39:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-21 21:39:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-21 21:39:05,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-12-21 21:39:05,421 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 55 [2020-12-21 21:39:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:05,421 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-12-21 21:39:05,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:39:05,422 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-12-21 21:39:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-21 21:39:05,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:05,423 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:05,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:39:05,636 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:05,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:05,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1485499283, now seen corresponding path program 14 times [2020-12-21 21:39:05,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:05,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349258146] [2020-12-21 21:39:05,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:39:05,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349258146] [2020-12-21 21:39:05,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634493894] [2020-12-21 21:39:05,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:06,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:39:06,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:06,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:39:06,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:39:06,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:06,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:39:06,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828818509] [2020-12-21 21:39:06,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:39:06,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:06,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:39:06,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:39:06,073 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 18 states. [2020-12-21 21:39:06,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:06,130 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2020-12-21 21:39:06,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:39:06,131 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-12-21 21:39:06,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:06,132 INFO L225 Difference]: With dead ends: 106 [2020-12-21 21:39:06,132 INFO L226 Difference]: Without dead ends: 70 [2020-12-21 21:39:06,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:39:06,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-21 21:39:06,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-12-21 21:39:06,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-21 21:39:06,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-12-21 21:39:06,137 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 57 [2020-12-21 21:39:06,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:06,138 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-12-21 21:39:06,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:39:06,138 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-12-21 21:39:06,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 21:39:06,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:06,139 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:06,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:06,354 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:06,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:06,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1102213717, now seen corresponding path program 15 times [2020-12-21 21:39:06,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:06,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895193496] [2020-12-21 21:39:06,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:39:06,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895193496] [2020-12-21 21:39:06,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958733046] [2020-12-21 21:39:06,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:06,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-21 21:39:06,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:06,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:39:06,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-21 21:39:07,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:07,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2020-12-21 21:39:07,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840161372] [2020-12-21 21:39:07,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:39:07,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:07,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:39:07,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:39:07,023 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 26 states. [2020-12-21 21:39:07,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:07,486 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2020-12-21 21:39:07,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:39:07,486 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-12-21 21:39:07,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:07,487 INFO L225 Difference]: With dead ends: 113 [2020-12-21 21:39:07,487 INFO L226 Difference]: Without dead ends: 77 [2020-12-21 21:39:07,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=613, Invalid=1109, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 21:39:07,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-21 21:39:07,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-12-21 21:39:07,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-21 21:39:07,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2020-12-21 21:39:07,496 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 59 [2020-12-21 21:39:07,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:07,497 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2020-12-21 21:39:07,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:39:07,497 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2020-12-21 21:39:07,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-21 21:39:07,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:07,499 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:07,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:39:07,713 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:07,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:07,714 INFO L82 PathProgramCache]: Analyzing trace with hash 705661594, now seen corresponding path program 16 times [2020-12-21 21:39:07,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:07,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447235375] [2020-12-21 21:39:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:39:08,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447235375] [2020-12-21 21:39:08,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769527562] [2020-12-21 21:39:08,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:08,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:39:08,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:08,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:39:08,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:39:08,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:08,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:39:08,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744741994] [2020-12-21 21:39:08,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:39:08,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:08,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:39:08,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:39:08,241 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand 20 states. [2020-12-21 21:39:08,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:08,311 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-12-21 21:39:08,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:39:08,312 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-12-21 21:39:08,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:08,312 INFO L225 Difference]: With dead ends: 116 [2020-12-21 21:39:08,313 INFO L226 Difference]: Without dead ends: 77 [2020-12-21 21:39:08,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:39:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-21 21:39:08,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-12-21 21:39:08,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-21 21:39:08,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-12-21 21:39:08,318 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 64 [2020-12-21 21:39:08,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:08,318 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-12-21 21:39:08,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:39:08,318 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-12-21 21:39:08,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-21 21:39:08,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:08,319 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:08,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:08,533 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:08,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:08,534 INFO L82 PathProgramCache]: Analyzing trace with hash -956969060, now seen corresponding path program 17 times [2020-12-21 21:39:08,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:08,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840556431] [2020-12-21 21:39:08,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:39:08,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840556431] [2020-12-21 21:39:08,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216884581] [2020-12-21 21:39:08,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:11,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-21 21:39:11,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:11,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:39:11,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:39:11,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:11,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-21 21:39:11,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316764180] [2020-12-21 21:39:11,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:39:11,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:11,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:39:11,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:39:11,810 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 21 states. [2020-12-21 21:39:11,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:11,889 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2020-12-21 21:39:11,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 21:39:11,890 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 66 [2020-12-21 21:39:11,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:11,891 INFO L225 Difference]: With dead ends: 118 [2020-12-21 21:39:11,891 INFO L226 Difference]: Without dead ends: 79 [2020-12-21 21:39:11,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:39:11,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-21 21:39:11,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-12-21 21:39:11,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-21 21:39:11,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2020-12-21 21:39:11,895 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 66 [2020-12-21 21:39:11,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:11,895 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2020-12-21 21:39:11,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:39:11,895 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2020-12-21 21:39:11,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-21 21:39:11,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:11,896 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:12,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:12,110 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:12,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:12,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1017193442, now seen corresponding path program 18 times [2020-12-21 21:39:12,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:12,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638865044] [2020-12-21 21:39:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:39:12,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638865044] [2020-12-21 21:39:12,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72110953] [2020-12-21 21:39:12,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:13,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-21 21:39:13,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:13,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:39:13,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-21 21:39:14,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:14,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2020-12-21 21:39:14,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482912108] [2020-12-21 21:39:14,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:39:14,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:14,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:39:14,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:39:14,173 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand 30 states. [2020-12-21 21:39:14,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:14,756 INFO L93 Difference]: Finished difference Result 125 states and 150 transitions. [2020-12-21 21:39:14,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 21:39:14,757 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-12-21 21:39:14,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:14,758 INFO L225 Difference]: With dead ends: 125 [2020-12-21 21:39:14,758 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:39:14,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=834, Invalid=1518, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:39:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:39:14,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-12-21 21:39:14,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 21:39:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-12-21 21:39:14,763 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 68 [2020-12-21 21:39:14,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:14,763 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-12-21 21:39:14,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:39:14,763 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-12-21 21:39:14,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-21 21:39:14,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:14,764 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:14,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 21:39:14,979 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:14,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:14,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1139055235, now seen corresponding path program 19 times [2020-12-21 21:39:14,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:14,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296830837] [2020-12-21 21:39:14,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:39:15,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296830837] [2020-12-21 21:39:15,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394240661] [2020-12-21 21:39:15,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:15,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:39:15,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:39:15,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:15,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-21 21:39:15,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129972223] [2020-12-21 21:39:15,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:39:15,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:15,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:39:15,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:39:15,465 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 23 states. [2020-12-21 21:39:15,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:15,529 INFO L93 Difference]: Finished difference Result 128 states and 152 transitions. [2020-12-21 21:39:15,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:39:15,530 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 73 [2020-12-21 21:39:15,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:15,531 INFO L225 Difference]: With dead ends: 128 [2020-12-21 21:39:15,531 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:39:15,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:39:15,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:39:15,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-21 21:39:15,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-21 21:39:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-12-21 21:39:15,541 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 73 [2020-12-21 21:39:15,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:15,541 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-12-21 21:39:15,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:39:15,541 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-12-21 21:39:15,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-21 21:39:15,542 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:15,542 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:15,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:15,748 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:15,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:15,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2110707649, now seen corresponding path program 20 times [2020-12-21 21:39:15,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:15,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910123495] [2020-12-21 21:39:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:39:16,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910123495] [2020-12-21 21:39:16,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506638139] [2020-12-21 21:39:16,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:16,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:39:16,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:39:16,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:39:16,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:16,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-21 21:39:16,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277472010] [2020-12-21 21:39:16,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:39:16,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:16,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:39:16,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:39:16,279 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 24 states. [2020-12-21 21:39:16,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:16,374 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2020-12-21 21:39:16,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:39:16,375 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 75 [2020-12-21 21:39:16,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:16,376 INFO L225 Difference]: With dead ends: 130 [2020-12-21 21:39:16,376 INFO L226 Difference]: Without dead ends: 88 [2020-12-21 21:39:16,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:39:16,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-21 21:39:16,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-21 21:39:16,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-21 21:39:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-12-21 21:39:16,384 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 75 [2020-12-21 21:39:16,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:16,384 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-12-21 21:39:16,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:39:16,384 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-12-21 21:39:16,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-21 21:39:16,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:16,385 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:16,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 21:39:16,601 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:16,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:16,601 INFO L82 PathProgramCache]: Analyzing trace with hash -434193025, now seen corresponding path program 21 times [2020-12-21 21:39:16,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:16,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341660444] [2020-12-21 21:39:16,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:39:16,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341660444] [2020-12-21 21:39:16,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133342962] [2020-12-21 21:39:16,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:17,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 21:39:17,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:17,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:39:17,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-12-21 21:39:17,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:17,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 12] total 34 [2020-12-21 21:39:17,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474172867] [2020-12-21 21:39:17,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-21 21:39:17,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:17,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-21 21:39:17,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:39:17,914 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 34 states. [2020-12-21 21:39:18,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:18,566 INFO L93 Difference]: Finished difference Result 137 states and 164 transitions. [2020-12-21 21:39:18,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 21:39:18,567 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 77 [2020-12-21 21:39:18,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:18,567 INFO L225 Difference]: With dead ends: 137 [2020-12-21 21:39:18,568 INFO L226 Difference]: Without dead ends: 95 [2020-12-21 21:39:18,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1089, Invalid=1991, Unknown=0, NotChecked=0, Total=3080 [2020-12-21 21:39:18,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-21 21:39:18,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-12-21 21:39:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-21 21:39:18,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2020-12-21 21:39:18,574 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 77 [2020-12-21 21:39:18,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:18,574 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2020-12-21 21:39:18,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-21 21:39:18,574 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2020-12-21 21:39:18,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-21 21:39:18,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:18,575 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:18,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 21:39:18,789 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:18,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:18,789 INFO L82 PathProgramCache]: Analyzing trace with hash -518734394, now seen corresponding path program 22 times [2020-12-21 21:39:18,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:18,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330945427] [2020-12-21 21:39:18,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-21 21:39:19,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330945427] [2020-12-21 21:39:19,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393917801] [2020-12-21 21:39:19,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:19,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:39:19,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:19,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:39:19,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-21 21:39:19,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:19,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-21 21:39:19,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201712222] [2020-12-21 21:39:19,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:39:19,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:19,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:39:19,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:39:19,569 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand 26 states. [2020-12-21 21:39:19,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:19,653 INFO L93 Difference]: Finished difference Result 140 states and 166 transitions. [2020-12-21 21:39:19,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 21:39:19,654 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 82 [2020-12-21 21:39:19,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:19,654 INFO L225 Difference]: With dead ends: 140 [2020-12-21 21:39:19,655 INFO L226 Difference]: Without dead ends: 95 [2020-12-21 21:39:19,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:39:19,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-21 21:39:19,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-12-21 21:39:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-21 21:39:19,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2020-12-21 21:39:19,659 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 82 [2020-12-21 21:39:19,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:19,660 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2020-12-21 21:39:19,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:39:19,660 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2020-12-21 21:39:19,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-21 21:39:19,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:19,661 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:19,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:19,877 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:19,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:19,878 INFO L82 PathProgramCache]: Analyzing trace with hash -668432824, now seen corresponding path program 23 times [2020-12-21 21:39:19,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:19,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625207235] [2020-12-21 21:39:19,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-21 21:39:20,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625207235] [2020-12-21 21:39:20,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515798624] [2020-12-21 21:39:20,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:38,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-21 21:39:38,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:38,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:39:38,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-12-21 21:39:39,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:39,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13] total 37 [2020-12-21 21:39:39,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58755260] [2020-12-21 21:39:39,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 21:39:39,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:39,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 21:39:39,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=930, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:39:39,205 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand 37 states. [2020-12-21 21:39:39,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:39,975 INFO L93 Difference]: Finished difference Result 147 states and 176 transitions. [2020-12-21 21:39:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 21:39:39,976 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 84 [2020-12-21 21:39:39,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:39,977 INFO L225 Difference]: With dead ends: 147 [2020-12-21 21:39:39,977 INFO L226 Difference]: Without dead ends: 102 [2020-12-21 21:39:39,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1290, Invalid=2370, Unknown=0, NotChecked=0, Total=3660 [2020-12-21 21:39:39,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-21 21:39:39,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2020-12-21 21:39:39,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-21 21:39:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2020-12-21 21:39:39,983 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 84 [2020-12-21 21:39:39,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:39,983 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2020-12-21 21:39:39,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 21:39:39,983 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2020-12-21 21:39:39,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 21:39:39,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:39,985 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:40,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 21:39:40,185 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:40,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:40,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1249938457, now seen corresponding path program 24 times [2020-12-21 21:39:40,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:40,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171975154] [2020-12-21 21:39:40,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-21 21:39:40,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171975154] [2020-12-21 21:39:40,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418791000] [2020-12-21 21:39:40,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:55,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-21 21:39:55,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:55,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:39:55,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-21 21:39:56,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:56,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 39 [2020-12-21 21:39:56,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966672745] [2020-12-21 21:39:56,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-21 21:39:56,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:56,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-21 21:39:56,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1041, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:39:56,206 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand 39 states. [2020-12-21 21:39:57,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:57,096 INFO L93 Difference]: Finished difference Result 155 states and 186 transitions. [2020-12-21 21:39:57,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-21 21:39:57,097 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 89 [2020-12-21 21:39:57,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:57,098 INFO L225 Difference]: With dead ends: 155 [2020-12-21 21:39:57,098 INFO L226 Difference]: Without dead ends: 107 [2020-12-21 21:39:57,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1416, Invalid=2616, Unknown=0, NotChecked=0, Total=4032 [2020-12-21 21:39:57,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-21 21:39:57,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2020-12-21 21:39:57,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-21 21:39:57,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2020-12-21 21:39:57,104 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 89 [2020-12-21 21:39:57,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:57,104 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2020-12-21 21:39:57,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-21 21:39:57,105 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2020-12-21 21:39:57,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-21 21:39:57,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:57,106 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:57,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:57,322 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:57,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:57,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1156923924, now seen corresponding path program 25 times [2020-12-21 21:39:57,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:57,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943536655] [2020-12-21 21:39:57,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:39:57,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943536655] [2020-12-21 21:39:57,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491986359] [2020-12-21 21:39:57,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:57,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 21:39:57,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:39:58,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:58,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-21 21:39:58,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824489296] [2020-12-21 21:39:58,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:39:58,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:58,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:39:58,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:39:58,015 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand 29 states. [2020-12-21 21:39:58,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:58,119 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2020-12-21 21:39:58,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 21:39:58,120 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 94 [2020-12-21 21:39:58,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:58,121 INFO L225 Difference]: With dead ends: 158 [2020-12-21 21:39:58,121 INFO L226 Difference]: Without dead ends: 107 [2020-12-21 21:39:58,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:39:58,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-21 21:39:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-12-21 21:39:58,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-21 21:39:58,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2020-12-21 21:39:58,126 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 94 [2020-12-21 21:39:58,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:58,126 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2020-12-21 21:39:58,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:39:58,126 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2020-12-21 21:39:58,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-21 21:39:58,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:58,127 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:58,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 21:39:58,342 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:58,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:58,342 INFO L82 PathProgramCache]: Analyzing trace with hash 691786606, now seen corresponding path program 26 times [2020-12-21 21:39:58,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:58,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132385117] [2020-12-21 21:39:58,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:39:58,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132385117] [2020-12-21 21:39:58,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399468422] [2020-12-21 21:39:58,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:58,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:39:58,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:58,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-21 21:39:58,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:39:59,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:59,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-21 21:39:59,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548800492] [2020-12-21 21:39:59,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:39:59,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:59,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:39:59,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:39:59,115 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand 30 states. [2020-12-21 21:39:59,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:59,222 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2020-12-21 21:39:59,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 21:39:59,223 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 96 [2020-12-21 21:39:59,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:59,223 INFO L225 Difference]: With dead ends: 160 [2020-12-21 21:39:59,224 INFO L226 Difference]: Without dead ends: 109 [2020-12-21 21:39:59,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:39:59,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-21 21:39:59,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-12-21 21:39:59,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-21 21:39:59,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2020-12-21 21:39:59,230 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 96 [2020-12-21 21:39:59,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:59,230 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2020-12-21 21:39:59,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:39:59,230 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2020-12-21 21:39:59,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-21 21:39:59,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:59,231 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:59,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:39:59,446 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:59,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:59,447 INFO L82 PathProgramCache]: Analyzing trace with hash -813854608, now seen corresponding path program 27 times [2020-12-21 21:39:59,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:59,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642195285] [2020-12-21 21:39:59,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:00,043 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:40:00,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642195285] [2020-12-21 21:40:00,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697494366] [2020-12-21 21:40:00,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:01,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-21 21:40:01,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:40:01,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:40:01,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:40:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-12-21 21:40:02,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:40:02,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 15] total 43 [2020-12-21 21:40:02,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621987521] [2020-12-21 21:40:02,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-21 21:40:02,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:40:02,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-21 21:40:02,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:40:02,032 INFO L87 Difference]: Start difference. First operand 108 states and 123 transitions. Second operand 43 states. [2020-12-21 21:40:02,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:40:02,970 INFO L93 Difference]: Finished difference Result 167 states and 200 transitions. [2020-12-21 21:40:02,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-21 21:40:02,971 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 98 [2020-12-21 21:40:02,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:40:02,971 INFO L225 Difference]: With dead ends: 167 [2020-12-21 21:40:02,972 INFO L226 Difference]: Without dead ends: 116 [2020-12-21 21:40:02,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1743, Invalid=3227, Unknown=0, NotChecked=0, Total=4970 [2020-12-21 21:40:02,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-21 21:40:02,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2020-12-21 21:40:02,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-21 21:40:02,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2020-12-21 21:40:02,979 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 98 [2020-12-21 21:40:02,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:40:02,979 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2020-12-21 21:40:02,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-21 21:40:02,979 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2020-12-21 21:40:02,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-21 21:40:02,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:40:02,980 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:40:03,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:03,194 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:40:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:40:03,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1719645071, now seen corresponding path program 28 times [2020-12-21 21:40:03,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:40:03,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180132113] [2020-12-21 21:40:03,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:40:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 21:40:03,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180132113] [2020-12-21 21:40:03,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450314147] [2020-12-21 21:40:03,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:04,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:40:04,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:40:04,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 21:40:04,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:40:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 21:40:04,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:40:04,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-21 21:40:04,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936894451] [2020-12-21 21:40:04,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 21:40:04,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:40:04,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 21:40:04,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:40:04,196 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand 32 states. [2020-12-21 21:40:04,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:40:04,317 INFO L93 Difference]: Finished difference Result 170 states and 202 transitions. [2020-12-21 21:40:04,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 21:40:04,318 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 103 [2020-12-21 21:40:04,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:40:04,319 INFO L225 Difference]: With dead ends: 170 [2020-12-21 21:40:04,319 INFO L226 Difference]: Without dead ends: 116 [2020-12-21 21:40:04,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:40:04,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-21 21:40:04,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-12-21 21:40:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-21 21:40:04,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 131 transitions. [2020-12-21 21:40:04,333 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 131 transitions. Word has length 103 [2020-12-21 21:40:04,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:40:04,333 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 131 transitions. [2020-12-21 21:40:04,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 21:40:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 131 transitions. [2020-12-21 21:40:04,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-21 21:40:04,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:40:04,334 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:40:04,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:04,551 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:40:04,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:40:04,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1509799633, now seen corresponding path program 29 times [2020-12-21 21:40:04,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:40:04,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250351801] [2020-12-21 21:40:04,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:40:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 21:40:05,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250351801] [2020-12-21 21:40:05,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269573941] [2020-12-21 21:40:05,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:36,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-21 21:40:36,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:40:36,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:40:36,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:40:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-12-21 21:40:36,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:40:36,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 16] total 46 [2020-12-21 21:40:36,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522402228] [2020-12-21 21:40:36,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-21 21:40:36,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:40:36,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-21 21:40:36,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=615, Invalid=1455, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 21:40:36,598 INFO L87 Difference]: Start difference. First operand 115 states and 131 transitions. Second operand 46 states. [2020-12-21 21:40:37,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:40:37,631 INFO L93 Difference]: Finished difference Result 177 states and 212 transitions. [2020-12-21 21:40:37,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-21 21:40:37,632 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 105 [2020-12-21 21:40:37,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:40:37,633 INFO L225 Difference]: With dead ends: 177 [2020-12-21 21:40:37,633 INFO L226 Difference]: Without dead ends: 123 [2020-12-21 21:40:37,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1995, Invalid=3705, Unknown=0, NotChecked=0, Total=5700 [2020-12-21 21:40:37,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-21 21:40:37,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2020-12-21 21:40:37,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-21 21:40:37,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2020-12-21 21:40:37,640 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 105 [2020-12-21 21:40:37,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:40:37,640 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2020-12-21 21:40:37,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-21 21:40:37,640 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2020-12-21 21:40:37,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-21 21:40:37,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:40:37,641 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:40:37,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-21 21:40:37,842 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:40:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:40:37,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1672110826, now seen corresponding path program 30 times [2020-12-21 21:40:37,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:40:37,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223560739] [2020-12-21 21:40:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:40:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-21 21:40:38,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223560739] [2020-12-21 21:40:38,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160101535] [2020-12-21 21:40:38,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:41:56,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2020-12-21 21:41:56,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:41:56,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:41:56,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:41:57,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-12-21 21:41:57,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:41:57,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 17] total 48 [2020-12-21 21:41:57,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489299183] [2020-12-21 21:41:57,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-21 21:41:57,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:41:57,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-21 21:41:57,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=663, Invalid=1593, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 21:41:57,576 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand 48 states. [2020-12-21 21:41:58,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:41:58,814 INFO L93 Difference]: Finished difference Result 185 states and 222 transitions. [2020-12-21 21:41:58,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-21 21:41:58,815 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 110 [2020-12-21 21:41:58,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:41:58,816 INFO L225 Difference]: With dead ends: 185 [2020-12-21 21:41:58,816 INFO L226 Difference]: Without dead ends: 128 [2020-12-21 21:41:58,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2151, Invalid=4011, Unknown=0, NotChecked=0, Total=6162 [2020-12-21 21:41:58,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-21 21:41:58,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2020-12-21 21:41:58,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 21:41:58,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2020-12-21 21:41:58,824 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 110 [2020-12-21 21:41:58,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:41:58,824 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2020-12-21 21:41:58,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-21 21:41:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2020-12-21 21:41:58,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-21 21:41:58,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:41:58,825 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:41:59,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:41:59,040 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:41:59,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:41:59,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1566193397, now seen corresponding path program 31 times [2020-12-21 21:41:59,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:41:59,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515596114] [2020-12-21 21:41:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:41:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:41:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:41:59,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515596114] [2020-12-21 21:41:59,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723039188] [2020-12-21 21:41:59,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:41:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:41:59,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-21 21:41:59,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:42:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:42:00,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:42:00,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-21 21:42:00,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350970205] [2020-12-21 21:42:00,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-21 21:42:00,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:42:00,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-21 21:42:00,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:42:00,127 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand 35 states. [2020-12-21 21:42:00,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:42:00,269 INFO L93 Difference]: Finished difference Result 188 states and 224 transitions. [2020-12-21 21:42:00,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 21:42:00,275 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 115 [2020-12-21 21:42:00,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:42:00,276 INFO L225 Difference]: With dead ends: 188 [2020-12-21 21:42:00,276 INFO L226 Difference]: Without dead ends: 128 [2020-12-21 21:42:00,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:42:00,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-21 21:42:00,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-12-21 21:42:00,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-21 21:42:00,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 145 transitions. [2020-12-21 21:42:00,282 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 145 transitions. Word has length 115 [2020-12-21 21:42:00,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:42:00,283 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 145 transitions. [2020-12-21 21:42:00,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-21 21:42:00,283 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 145 transitions. [2020-12-21 21:42:00,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-21 21:42:00,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:42:00,284 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:42:00,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-21 21:42:00,500 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:42:00,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:42:00,501 INFO L82 PathProgramCache]: Analyzing trace with hash -179529527, now seen corresponding path program 32 times [2020-12-21 21:42:00,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:42:00,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365602794] [2020-12-21 21:42:00,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:42:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:42:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:42:01,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365602794] [2020-12-21 21:42:01,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056537484] [2020-12-21 21:42:01,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:42:01,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:42:01,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:42:01,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-21 21:42:01,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:42:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:42:01,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:42:01,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-21 21:42:01,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899071190] [2020-12-21 21:42:01,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 21:42:01,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:42:01,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 21:42:01,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:42:01,637 INFO L87 Difference]: Start difference. First operand 127 states and 145 transitions. Second operand 36 states. [2020-12-21 21:42:01,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:42:01,798 INFO L93 Difference]: Finished difference Result 190 states and 226 transitions. [2020-12-21 21:42:01,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-21 21:42:01,799 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 117 [2020-12-21 21:42:01,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:42:01,800 INFO L225 Difference]: With dead ends: 190 [2020-12-21 21:42:01,800 INFO L226 Difference]: Without dead ends: 130 [2020-12-21 21:42:01,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:42:01,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-21 21:42:01,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-12-21 21:42:01,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-21 21:42:01,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2020-12-21 21:42:01,806 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 117 [2020-12-21 21:42:01,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:42:01,807 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2020-12-21 21:42:01,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 21:42:01,807 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2020-12-21 21:42:01,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-21 21:42:01,809 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:42:01,809 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:42:02,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-21 21:42:02,025 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:42:02,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:42:02,026 INFO L82 PathProgramCache]: Analyzing trace with hash 964587783, now seen corresponding path program 33 times [2020-12-21 21:42:02,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:42:02,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492436817] [2020-12-21 21:42:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:42:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:42:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:42:02,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492436817] [2020-12-21 21:42:02,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960838232] [2020-12-21 21:42:02,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:42:07,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-21 21:42:07,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:42:07,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:42:07,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:42:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-12-21 21:42:08,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:42:08,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 18] total 52 [2020-12-21 21:42:08,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408994388] [2020-12-21 21:42:08,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-21 21:42:08,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:42:08,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-21 21:42:08,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=1870, Unknown=0, NotChecked=0, Total=2652 [2020-12-21 21:42:08,425 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand 52 states. [2020-12-21 21:42:09,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:42:09,814 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2020-12-21 21:42:09,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-21 21:42:09,815 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 119 [2020-12-21 21:42:09,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:42:09,816 INFO L225 Difference]: With dead ends: 197 [2020-12-21 21:42:09,817 INFO L226 Difference]: Without dead ends: 137 [2020-12-21 21:42:09,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2550, Invalid=4760, Unknown=0, NotChecked=0, Total=7310 [2020-12-21 21:42:09,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-21 21:42:09,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2020-12-21 21:42:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-21 21:42:09,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 153 transitions. [2020-12-21 21:42:09,823 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 153 transitions. Word has length 119 [2020-12-21 21:42:09,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:42:09,824 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 153 transitions. [2020-12-21 21:42:09,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-21 21:42:09,824 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 153 transitions. [2020-12-21 21:42:09,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-21 21:42:09,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:42:09,825 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:42:10,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-21 21:42:10,040 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:42:10,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:42:10,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1726192318, now seen corresponding path program 34 times [2020-12-21 21:42:10,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:42:10,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138611170] [2020-12-21 21:42:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:42:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:42:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1532 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-21 21:42:10,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138611170] [2020-12-21 21:42:10,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516471215] [2020-12-21 21:42:10,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:42:11,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:42:11,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:42:11,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 21:42:11,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:42:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1532 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-21 21:42:11,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:42:11,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-21 21:42:11,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079777355] [2020-12-21 21:42:11,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 21:42:11,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:42:11,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 21:42:11,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:42:11,612 INFO L87 Difference]: Start difference. First operand 134 states and 153 transitions. Second operand 38 states. [2020-12-21 21:42:11,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:42:11,753 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-12-21 21:42:11,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 21:42:11,754 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 124 [2020-12-21 21:42:11,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:42:11,755 INFO L225 Difference]: With dead ends: 200 [2020-12-21 21:42:11,755 INFO L226 Difference]: Without dead ends: 137 [2020-12-21 21:42:11,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:42:11,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-21 21:42:11,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-12-21 21:42:11,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-21 21:42:11,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 155 transitions. [2020-12-21 21:42:11,760 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 155 transitions. Word has length 124 [2020-12-21 21:42:11,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:42:11,760 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 155 transitions. [2020-12-21 21:42:11,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 21:42:11,761 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 155 transitions. [2020-12-21 21:42:11,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-21 21:42:11,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:42:11,762 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:42:11,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 21:42:11,976 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:42:11,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:42:11,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1610064064, now seen corresponding path program 35 times [2020-12-21 21:42:11,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:42:11,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483509964] [2020-12-21 21:42:11,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:42:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:42:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-21 21:42:12,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483509964] [2020-12-21 21:42:12,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392880893] [2020-12-21 21:42:12,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true