/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_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:38:45,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:38:45,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:38:45,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 21:38:45,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:38:45,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:38:45,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:38:45,349 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:38:45,401 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:38:45,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:38:45,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:38:45,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:38:45,408 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:38:45,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:38:45,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:38:45,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:38:45,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:38:45,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:38:45,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:38:45,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:38:45,411 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:38:45,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:38:45,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:38:45,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:38:45,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:38:45,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:38:45,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:38:45,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:38:45,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:38:45,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:38:45,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:38:45,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:38:45,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:38:45,414 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:38:45,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:38:45,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:38:45,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:38:45,933 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:38:45,934 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:38:45,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2020-12-21 21:38:46,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d0ea95dd/bfe760d74cf1495cbfffb3ebabf60ca5/FLAG76fc24f28 [2020-12-21 21:38:46,846 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:38:46,846 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2020-12-21 21:38:46,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d0ea95dd/bfe760d74cf1495cbfffb3ebabf60ca5/FLAG76fc24f28 [2020-12-21 21:38:47,192 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d0ea95dd/bfe760d74cf1495cbfffb3ebabf60ca5 [2020-12-21 21:38:47,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:38:47,198 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:38:47,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:38:47,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:38:47,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:38:47,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:38:47" (1/1) ... [2020-12-21 21:38:47,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35810cdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:47, skipping insertion in model container [2020-12-21 21:38:47,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:38:47" (1/1) ... [2020-12-21 21:38:47,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:38:47,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:38:47,457 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_ground-1.i[860,873] [2020-12-21 21:38:47,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:38:47,512 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:38:47,533 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_ground-1.i[860,873] [2020-12-21 21:38:47,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:38:47,592 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:38:47,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:47 WrapperNode [2020-12-21 21:38:47,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:38:47,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:38:47,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:38:47,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:38:47,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:47" (1/1) ... [2020-12-21 21:38:47,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:47" (1/1) ... [2020-12-21 21:38:47,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:38:47,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:38:47,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:38:47,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:38:47,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:47" (1/1) ... [2020-12-21 21:38:47,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:47" (1/1) ... [2020-12-21 21:38:47,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:47" (1/1) ... [2020-12-21 21:38:47,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:47" (1/1) ... [2020-12-21 21:38:47,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:47" (1/1) ... [2020-12-21 21:38:47,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:47" (1/1) ... [2020-12-21 21:38:47,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:47" (1/1) ... [2020-12-21 21:38:47,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:38:47,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:38:47,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:38:47,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:38:47,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:47" (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 21:38:47,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:38:47,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:38:47,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:38:47,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:38:47,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:38:47,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:38:47,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:38:48,205 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:38:48,205 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-21 21:38:48,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:38:48 BoogieIcfgContainer [2020-12-21 21:38:48,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:38:48,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:38:48,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:38:48,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:38:48,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:38:47" (1/3) ... [2020-12-21 21:38:48,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@457178ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:38:48, skipping insertion in model container [2020-12-21 21:38:48,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:47" (2/3) ... [2020-12-21 21:38:48,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@457178ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:38:48, skipping insertion in model container [2020-12-21 21:38:48,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:38:48" (3/3) ... [2020-12-21 21:38:48,218 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2020-12-21 21:38:48,227 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:38:48,235 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-21 21:38:48,266 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-21 21:38:48,336 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:38:48,336 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:38:48,337 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:38:48,337 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:38:48,337 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:38:48,338 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:38:48,338 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:38:48,338 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:38:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-12-21 21:38:48,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:38:48,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:48,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:48,378 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:48,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:48,388 INFO L82 PathProgramCache]: Analyzing trace with hash 232427437, now seen corresponding path program 1 times [2020-12-21 21:38:48,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:48,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813973822] [2020-12-21 21:38:48,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:38:48,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813973822] [2020-12-21 21:38:48,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:38:48,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:38:48,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205542153] [2020-12-21 21:38:48,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:38:48,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:48,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:38:48,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:38:48,703 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-12-21 21:38:48,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:48,725 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2020-12-21 21:38:48,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:38:48,727 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-21 21:38:48,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:48,738 INFO L225 Difference]: With dead ends: 49 [2020-12-21 21:38:48,738 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 21:38:48,742 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 21:38:48,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 21:38:48,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-21 21:38:48,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 21:38:48,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-21 21:38:48,787 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 9 [2020-12-21 21:38:48,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:48,787 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-21 21:38:48,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:38:48,788 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-21 21:38:48,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:38:48,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:48,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:48,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:38:48,790 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:48,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:48,791 INFO L82 PathProgramCache]: Analyzing trace with hash -950337193, now seen corresponding path program 1 times [2020-12-21 21:38:48,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:48,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66175757] [2020-12-21 21:38:48,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:48,852 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 21:38:48,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66175757] [2020-12-21 21:38:48,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:38:48,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:38:48,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422857374] [2020-12-21 21:38:48,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:38:48,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:48,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:38:48,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:38:48,858 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 3 states. [2020-12-21 21:38:48,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:48,924 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-12-21 21:38:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:38:48,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-21 21:38:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:48,929 INFO L225 Difference]: With dead ends: 47 [2020-12-21 21:38:48,929 INFO L226 Difference]: Without dead ends: 29 [2020-12-21 21:38:48,930 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 21:38:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-21 21:38:48,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-12-21 21:38:48,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-21 21:38:48,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-12-21 21:38:48,945 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 9 [2020-12-21 21:38:48,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:48,945 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-12-21 21:38:48,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:38:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-12-21 21:38:48,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 21:38:48,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:48,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:48,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:38:48,948 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:48,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:48,950 INFO L82 PathProgramCache]: Analyzing trace with hash 166796571, now seen corresponding path program 1 times [2020-12-21 21:38:48,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:48,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282114010] [2020-12-21 21:38:48,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:49,085 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 21:38:49,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282114010] [2020-12-21 21:38:49,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175658911] [2020-12-21 21:38:49,087 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 21:38:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:49,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:38:49,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:49,339 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 21:38:49,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:49,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:38:49,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972835497] [2020-12-21 21:38:49,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:38:49,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:49,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:38:49,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:38:49,352 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 5 states. [2020-12-21 21:38:49,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:49,447 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2020-12-21 21:38:49,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:38:49,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-21 21:38:49,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:49,456 INFO L225 Difference]: With dead ends: 54 [2020-12-21 21:38:49,456 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 21:38:49,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 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 21:38:49,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 21:38:49,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-12-21 21:38:49,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 21:38:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-12-21 21:38:49,472 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 15 [2020-12-21 21:38:49,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:49,472 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-12-21 21:38:49,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:38:49,473 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-12-21 21:38:49,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 21:38:49,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:49,474 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:49,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 21:38:49,689 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:49,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:49,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1231666793, now seen corresponding path program 2 times [2020-12-21 21:38:49,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:49,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971171774] [2020-12-21 21:38:49,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-21 21:38:49,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971171774] [2020-12-21 21:38:49,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:38:49,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:38:49,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213925068] [2020-12-21 21:38:49,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:38:49,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:49,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:38:49,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:38:49,774 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 4 states. [2020-12-21 21:38:49,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:49,803 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-12-21 21:38:49,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:38:49,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-12-21 21:38:49,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:49,805 INFO L225 Difference]: With dead ends: 72 [2020-12-21 21:38:49,805 INFO L226 Difference]: Without dead ends: 59 [2020-12-21 21:38:49,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:38:49,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-21 21:38:49,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2020-12-21 21:38:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 21:38:49,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2020-12-21 21:38:49,816 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 21 [2020-12-21 21:38:49,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:49,816 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2020-12-21 21:38:49,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:38:49,816 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2020-12-21 21:38:49,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 21:38:49,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:49,818 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:49,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-21 21:38:49,821 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:49,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:49,822 INFO L82 PathProgramCache]: Analyzing trace with hash 48196885, now seen corresponding path program 1 times [2020-12-21 21:38:49,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:49,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056400784] [2020-12-21 21:38:49,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:38:49,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056400784] [2020-12-21 21:38:49,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633927786] [2020-12-21 21:38:49,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:50,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:38:50,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:38:50,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:50,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:38:50,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638305403] [2020-12-21 21:38:50,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:38:50,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:50,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:38:50,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:38:50,118 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 6 states. [2020-12-21 21:38:50,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:50,230 INFO L93 Difference]: Finished difference Result 98 states and 129 transitions. [2020-12-21 21:38:50,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:38:50,230 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-21 21:38:50,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:50,231 INFO L225 Difference]: With dead ends: 98 [2020-12-21 21:38:50,232 INFO L226 Difference]: Without dead ends: 66 [2020-12-21 21:38:50,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:38:50,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-21 21:38:50,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-12-21 21:38:50,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-21 21:38:50,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2020-12-21 21:38:50,242 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 21 [2020-12-21 21:38:50,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:50,242 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2020-12-21 21:38:50,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:38:50,242 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2020-12-21 21:38:50,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 21:38:50,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:50,244 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:50,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:50,460 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:50,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:50,461 INFO L82 PathProgramCache]: Analyzing trace with hash -491835875, now seen corresponding path program 2 times [2020-12-21 21:38:50,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:50,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152701916] [2020-12-21 21:38:50,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:38:50,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152701916] [2020-12-21 21:38:50,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461400309] [2020-12-21 21:38:50,525 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 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 21:38:50,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:38:50,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:50,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:38:50,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:38:50,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:50,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:38:50,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133787600] [2020-12-21 21:38:50,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:38:50,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:50,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:38:50,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:38:50,636 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand 7 states. [2020-12-21 21:38:50,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:50,701 INFO L93 Difference]: Finished difference Result 116 states and 153 transitions. [2020-12-21 21:38:50,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:38:50,701 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-12-21 21:38:50,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:50,702 INFO L225 Difference]: With dead ends: 116 [2020-12-21 21:38:50,702 INFO L226 Difference]: Without dead ends: 78 [2020-12-21 21:38:50,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:38:50,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-21 21:38:50,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2020-12-21 21:38:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-21 21:38:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2020-12-21 21:38:50,712 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 27 [2020-12-21 21:38:50,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:50,712 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2020-12-21 21:38:50,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:38:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2020-12-21 21:38:50,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 21:38:50,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:50,714 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:50,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:50,929 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:50,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:50,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1359435477, now seen corresponding path program 3 times [2020-12-21 21:38:50,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:50,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864812732] [2020-12-21 21:38:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-21 21:38:51,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864812732] [2020-12-21 21:38:51,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122810405] [2020-12-21 21:38:51,003 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 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 21:38:51,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 21:38:51,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:51,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:38:51,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-21 21:38:51,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:51,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:38:51,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466355064] [2020-12-21 21:38:51,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:38:51,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:51,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:38:51,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:38:51,177 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 8 states. [2020-12-21 21:38:51,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:51,251 INFO L93 Difference]: Finished difference Result 134 states and 177 transitions. [2020-12-21 21:38:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:38:51,252 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-12-21 21:38:51,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:51,253 INFO L225 Difference]: With dead ends: 134 [2020-12-21 21:38:51,253 INFO L226 Difference]: Without dead ends: 90 [2020-12-21 21:38:51,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 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 21:38:51,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-21 21:38:51,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2020-12-21 21:38:51,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-21 21:38:51,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2020-12-21 21:38:51,270 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 33 [2020-12-21 21:38:51,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:51,271 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2020-12-21 21:38:51,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:38:51,271 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2020-12-21 21:38:51,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 21:38:51,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:51,276 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:51,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:51,492 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:51,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:51,493 INFO L82 PathProgramCache]: Analyzing trace with hash 128035293, now seen corresponding path program 4 times [2020-12-21 21:38:51,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:51,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891278145] [2020-12-21 21:38:51,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:38:51,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891278145] [2020-12-21 21:38:51,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478536544] [2020-12-21 21:38:51,608 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 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 21:38:51,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:38:51,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:51,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:38:51,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:38:51,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:51,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:38:51,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098388601] [2020-12-21 21:38:51,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:38:51,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:51,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:38:51,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:38:51,865 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand 9 states. [2020-12-21 21:38:51,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:51,981 INFO L93 Difference]: Finished difference Result 152 states and 201 transitions. [2020-12-21 21:38:51,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:38:51,982 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-12-21 21:38:51,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:51,983 INFO L225 Difference]: With dead ends: 152 [2020-12-21 21:38:51,983 INFO L226 Difference]: Without dead ends: 102 [2020-12-21 21:38:51,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:38:51,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-21 21:38:51,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-12-21 21:38:51,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-21 21:38:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2020-12-21 21:38:51,993 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 39 [2020-12-21 21:38:51,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:51,993 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2020-12-21 21:38:51,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:38:51,994 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2020-12-21 21:38:51,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 21:38:51,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:51,995 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:52,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:52,210 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:52,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:52,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1662394219, now seen corresponding path program 5 times [2020-12-21 21:38:52,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:52,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855514638] [2020-12-21 21:38:52,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:38:52,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855514638] [2020-12-21 21:38:52,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858967931] [2020-12-21 21:38:52,311 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 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 21:38:52,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-21 21:38:52,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:52,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:38:52,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:38:52,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:52,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:38:52,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35441992] [2020-12-21 21:38:52,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:38:52,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:52,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:38:52,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:38:52,780 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand 10 states. [2020-12-21 21:38:52,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:52,902 INFO L93 Difference]: Finished difference Result 170 states and 225 transitions. [2020-12-21 21:38:52,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:38:52,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-12-21 21:38:52,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:52,904 INFO L225 Difference]: With dead ends: 170 [2020-12-21 21:38:52,904 INFO L226 Difference]: Without dead ends: 114 [2020-12-21 21:38:52,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:38:52,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-21 21:38:52,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2020-12-21 21:38:52,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-21 21:38:52,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 138 transitions. [2020-12-21 21:38:52,916 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 138 transitions. Word has length 45 [2020-12-21 21:38:52,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:52,916 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 138 transitions. [2020-12-21 21:38:52,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:38:52,916 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 138 transitions. [2020-12-21 21:38:52,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 21:38:52,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:52,917 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:53,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:53,132 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:53,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:53,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1210402205, now seen corresponding path program 6 times [2020-12-21 21:38:53,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:53,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868384492] [2020-12-21 21:38:53,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:38:53,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868384492] [2020-12-21 21:38:53,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449626191] [2020-12-21 21:38:53,325 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 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 21:38:53,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:38:53,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:53,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 21:38:53,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:53,577 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:38:53,578 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2020-12-21 21:38:53,582 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:38:53,592 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:38:53,594 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:38:53,595 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2020-12-21 21:38:53,697 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 21:38:53,698 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:38:53,713 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:38:53,716 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:38:53,716 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:27 [2020-12-21 21:38:53,838 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:38:53,838 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-21 21:38:53,842 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:38:53,846 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:38:53,879 INFO L625 ElimStorePlain]: treesize reduction 22, result has 62.1 percent of original size [2020-12-21 21:38:53,883 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:38:53,883 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:22 [2020-12-21 21:38:53,940 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:38:53,941 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-21 21:38:53,944 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:38:53,947 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:38:53,977 INFO L625 ElimStorePlain]: treesize reduction 16, result has 70.9 percent of original size [2020-12-21 21:38:53,980 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:38:53,980 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:28 [2020-12-21 21:38:54,019 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:38:54,053 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:38:54,064 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 21:38:54,065 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:38:54,086 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:38:54,087 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-21 21:38:54,089 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:38:54,094 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-21 21:38:54,164 INFO L625 ElimStorePlain]: treesize reduction 22, result has 73.5 percent of original size [2020-12-21 21:38:54,169 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-21 21:38:54,170 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:39 [2020-12-21 21:38:54,208 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:38:54,215 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 21:38:54,261 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:38:54,262 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 49 [2020-12-21 21:38:54,265 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:38:54,273 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2020-12-21 21:38:54,275 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-21 21:38:54,339 INFO L625 ElimStorePlain]: treesize reduction 24, result has 76.2 percent of original size [2020-12-21 21:38:54,347 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2020-12-21 21:38:54,347 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:85, output treesize:77 [2020-12-21 21:38:55,091 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:38:58,009 WARN L197 SmtUtils]: Spent 933.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-12-21 21:38:58,025 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:38:59,786 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:38:59,787 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 104 [2020-12-21 21:38:59,796 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:38:59,836 INFO L625 ElimStorePlain]: treesize reduction 76, result has 46.5 percent of original size [2020-12-21 21:38:59,843 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-21 21:38:59,843 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:70, output treesize:66 [2020-12-21 21:39:00,172 INFO L348 Elim1Store]: treesize reduction 17, result has 87.9 percent of original size [2020-12-21 21:39:00,173 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 72 treesize of output 198 [2020-12-21 21:39:00,188 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:39:00,261 INFO L625 ElimStorePlain]: treesize reduction 160, result has 37.0 percent of original size [2020-12-21 21:39:00,282 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-21 21:39:00,283 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:90, output treesize:66 [2020-12-21 21:39:02,581 INFO L348 Elim1Store]: treesize reduction 17, result has 87.9 percent of original size [2020-12-21 21:39:02,582 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 72 treesize of output 198 [2020-12-21 21:39:02,588 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:39:02,660 INFO L625 ElimStorePlain]: treesize reduction 160, result has 37.0 percent of original size [2020-12-21 21:39:02,678 INFO L547 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-2 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2020-12-21 21:39:02,679 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:90, output treesize:66 [2020-12-21 21:39:02,990 INFO L348 Elim1Store]: treesize reduction 17, result has 81.9 percent of original size [2020-12-21 21:39:02,994 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 89 [2020-12-21 21:39:03,001 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-21 21:39:03,001 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:39:03,005 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 3, 1] term [2020-12-21 21:39:03,006 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:39:03,006 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 1] term [2020-12-21 21:39:03,007 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:39:03,010 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:39:03,012 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:39:03,014 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-21 21:39:03,015 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 21:39:03,016 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:39:03,019 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-21 21:39:03,021 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:39:03,022 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:39:03,023 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:39:03,029 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2020-12-21 21:39:03,060 INFO L625 ElimStorePlain]: treesize reduction 58, result has 27.5 percent of original size [2020-12-21 21:39:03,062 INFO L547 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:39:03,063 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:78, output treesize:7 [2020-12-21 21:39:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 40 proven. 85 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-21 21:39:03,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:03,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 23] total 31 [2020-12-21 21:39:03,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2208011] [2020-12-21 21:39:03,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-21 21:39:03,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:03,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-21 21:39:03,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=721, Unknown=5, NotChecked=0, Total=930 [2020-12-21 21:39:03,139 INFO L87 Difference]: Start difference. First operand 106 states and 138 transitions. Second operand 31 states. [2020-12-21 21:39:10,362 WARN L197 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-12-21 21:39:14,579 WARN L197 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-12-21 21:39:20,569 WARN L197 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-12-21 21:39:29,642 WARN L197 SmtUtils]: Spent 2.49 s on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-21 21:39:37,737 WARN L197 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2020-12-21 21:39:48,543 WARN L197 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-21 21:39:53,404 WARN L197 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 56 [2020-12-21 21:40:14,666 WARN L197 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-21 21:40:26,276 WARN L197 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-21 21:40:36,198 WARN L197 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-21 21:40:38,420 WARN L197 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-12-21 21:41:48,948 WARN L197 SmtUtils]: Spent 4.91 s on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-12-21 21:42:13,762 WARN L197 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2020-12-21 21:42:29,295 WARN L197 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2020-12-21 21:42:56,856 WARN L197 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-12-21 21:43:15,400 WARN L197 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-12-21 21:43:24,083 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-12-21 21:43:27,047 WARN L197 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 66 DAG size of output: 43