/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_init2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:33:24,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:33:24,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:33:24,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 21:33:24,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:33:24,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:33:24,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:33:24,902 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:33:24,958 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:33:24,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:33:24,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:33:24,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:33:24,963 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:33:24,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:33:24,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:33:24,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:33:24,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:33:24,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:33:24,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:33:24,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:33:24,966 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:33:24,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:33:24,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:33:24,967 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:33:24,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:33:24,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:33:24,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:33:24,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:33:24,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:33:24,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:33:24,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:33:24,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:33:24,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:33:24,970 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:33:25,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:33:25,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:33:25,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:33:25,456 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:33:25,457 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:33:25,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init2_ground-2.i [2020-12-21 21:33:25,567 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a71e8ddd/9685c00ba0ab4afabcb12e0af291a952/FLAGe7141f71b [2020-12-21 21:33:26,262 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:33:26,262 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init2_ground-2.i [2020-12-21 21:33:26,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a71e8ddd/9685c00ba0ab4afabcb12e0af291a952/FLAGe7141f71b [2020-12-21 21:33:26,614 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a71e8ddd/9685c00ba0ab4afabcb12e0af291a952 [2020-12-21 21:33:26,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:33:26,623 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:33:26,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:33:26,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:33:26,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:33:26,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:33:26" (1/1) ... [2020-12-21 21:33:26,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@205cd10e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:26, skipping insertion in model container [2020-12-21 21:33:26,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:33:26" (1/1) ... [2020-12-21 21:33:26,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:33:26,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:33:26,881 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_init2_ground-2.i[816,829] [2020-12-21 21:33:26,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:33:26,907 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:33:26,922 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_init2_ground-2.i[816,829] [2020-12-21 21:33:26,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:33:26,949 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:33:26,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:26 WrapperNode [2020-12-21 21:33:26,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:33:26,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:33:26,952 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:33:26,952 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:33:26,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:26" (1/1) ... [2020-12-21 21:33:26,971 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:26" (1/1) ... [2020-12-21 21:33:26,992 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:33:26,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:33:26,993 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:33:26,993 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:33:27,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:26" (1/1) ... [2020-12-21 21:33:27,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:26" (1/1) ... [2020-12-21 21:33:27,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:26" (1/1) ... [2020-12-21 21:33:27,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:26" (1/1) ... [2020-12-21 21:33:27,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:26" (1/1) ... [2020-12-21 21:33:27,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:26" (1/1) ... [2020-12-21 21:33:27,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:26" (1/1) ... [2020-12-21 21:33:27,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:33:27,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:33:27,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:33:27,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:33:27,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:26" (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 21:33:27,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:33:27,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:33:27,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:33:27,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:33:27,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:33:27,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:33:27,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:33:27,500 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:33:27,501 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-21 21:33:27,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:33:27 BoogieIcfgContainer [2020-12-21 21:33:27,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:33:27,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:33:27,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:33:27,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:33:27,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:33:26" (1/3) ... [2020-12-21 21:33:27,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14843e01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:33:27, skipping insertion in model container [2020-12-21 21:33:27,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:33:26" (2/3) ... [2020-12-21 21:33:27,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14843e01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:33:27, skipping insertion in model container [2020-12-21 21:33:27,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:33:27" (3/3) ... [2020-12-21 21:33:27,527 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init2_ground-2.i [2020-12-21 21:33:27,565 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:33:27,582 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:33:27,655 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:33:27,709 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:33:27,711 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:33:27,711 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:33:27,711 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:33:27,711 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:33:27,711 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:33:27,712 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:33:27,712 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:33:27,731 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-21 21:33:27,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:33:27,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:27,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:27,738 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:27,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:27,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1157636873, now seen corresponding path program 1 times [2020-12-21 21:33:27,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:27,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765909623] [2020-12-21 21:33:27,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:28,045 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 21:33:28,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765909623] [2020-12-21 21:33:28,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:33:28,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:33:28,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808154347] [2020-12-21 21:33:28,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:33:28,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:28,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:33:28,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:33:28,083 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2020-12-21 21:33:28,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:28,175 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2020-12-21 21:33:28,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:33:28,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-21 21:33:28,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:28,195 INFO L225 Difference]: With dead ends: 31 [2020-12-21 21:33:28,195 INFO L226 Difference]: Without dead ends: 14 [2020-12-21 21:33:28,199 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 21:33:28,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-21 21:33:28,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-21 21:33:28,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-21 21:33:28,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-21 21:33:28,241 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2020-12-21 21:33:28,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:28,242 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-21 21:33:28,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:33:28,242 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-21 21:33:28,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 21:33:28,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:28,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:28,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:33:28,246 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:28,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:28,249 INFO L82 PathProgramCache]: Analyzing trace with hash 970257334, now seen corresponding path program 1 times [2020-12-21 21:33:28,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:28,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689751426] [2020-12-21 21:33:28,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:28,350 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 21:33:28,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689751426] [2020-12-21 21:33:28,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786526592] [2020-12-21 21:33:28,351 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 21:33:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:28,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:33:28,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:28,475 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 21:33:28,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:28,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:33:28,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675401905] [2020-12-21 21:33:28,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:33:28,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:28,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:33:28,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:33:28,479 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2020-12-21 21:33:28,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:28,508 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-12-21 21:33:28,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:33:28,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-21 21:33:28,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:28,510 INFO L225 Difference]: With dead ends: 26 [2020-12-21 21:33:28,510 INFO L226 Difference]: Without dead ends: 16 [2020-12-21 21:33:28,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 21:33:28,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-21 21:33:28,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-21 21:33:28,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-21 21:33:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-21 21:33:28,516 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2020-12-21 21:33:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:28,516 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-21 21:33:28,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:33:28,517 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-21 21:33:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 21:33:28,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:28,518 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:28,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:33:28,733 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:28,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:28,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1117998999, now seen corresponding path program 2 times [2020-12-21 21:33:28,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:28,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700321477] [2020-12-21 21:33:28,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:33:28,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700321477] [2020-12-21 21:33:28,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012366159] [2020-12-21 21:33:28,852 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 21:33:28,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:33:28,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:28,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:33:28,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:33:29,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:29,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:33:29,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841162210] [2020-12-21 21:33:29,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:33:29,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:29,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:33:29,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:33:29,021 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-12-21 21:33:29,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:29,059 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-12-21 21:33:29,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:33:29,060 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-21 21:33:29,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:29,061 INFO L225 Difference]: With dead ends: 29 [2020-12-21 21:33:29,061 INFO L226 Difference]: Without dead ends: 18 [2020-12-21 21:33:29,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 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 21:33:29,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-21 21:33:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-21 21:33:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 21:33:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-21 21:33:29,067 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-12-21 21:33:29,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:29,068 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-21 21:33:29,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:33:29,068 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-21 21:33:29,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 21:33:29,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:29,069 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:29,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:29,284 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:29,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:29,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1025156458, now seen corresponding path program 3 times [2020-12-21 21:33:29,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:29,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404892074] [2020-12-21 21:33:29,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:33:29,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404892074] [2020-12-21 21:33:29,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553165614] [2020-12-21 21:33:29,353 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 21:33:29,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:33:29,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:29,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:33:29,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 21:33:29,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:29,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:33:29,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259912714] [2020-12-21 21:33:29,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:33:29,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:29,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:33:29,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:33:29,450 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 7 states. [2020-12-21 21:33:29,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:29,487 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-12-21 21:33:29,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:33:29,488 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-21 21:33:29,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:29,488 INFO L225 Difference]: With dead ends: 32 [2020-12-21 21:33:29,489 INFO L226 Difference]: Without dead ends: 20 [2020-12-21 21:33:29,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 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 21:33:29,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-21 21:33:29,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-21 21:33:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-21 21:33:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-21 21:33:29,495 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2020-12-21 21:33:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:29,495 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-21 21:33:29,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:33:29,496 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-21 21:33:29,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:33:29,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:29,497 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:29,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:29,712 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:29,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:29,713 INFO L82 PathProgramCache]: Analyzing trace with hash -57021897, now seen corresponding path program 4 times [2020-12-21 21:33:29,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:29,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092783371] [2020-12-21 21:33:29,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-21 21:33:29,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092783371] [2020-12-21 21:33:29,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588072960] [2020-12-21 21:33:29,788 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 21:33:29,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:33:29,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:29,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:33:29,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-21 21:33:29,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:29,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:33:29,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394387978] [2020-12-21 21:33:29,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:33:29,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:29,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:33:29,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:33:29,912 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2020-12-21 21:33:29,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:29,947 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-12-21 21:33:29,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:33:29,947 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-21 21:33:29,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:29,948 INFO L225 Difference]: With dead ends: 35 [2020-12-21 21:33:29,948 INFO L226 Difference]: Without dead ends: 22 [2020-12-21 21:33:29,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 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 21:33:29,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-21 21:33:29,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-21 21:33:29,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-21 21:33:29,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-21 21:33:29,954 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2020-12-21 21:33:29,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:29,954 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-21 21:33:29,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:33:29,954 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-21 21:33:29,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:33:29,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:29,955 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:30,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:30,169 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:30,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:30,171 INFO L82 PathProgramCache]: Analyzing trace with hash 315152758, now seen corresponding path program 5 times [2020-12-21 21:33:30,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:30,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517334209] [2020-12-21 21:33:30,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-21 21:33:30,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517334209] [2020-12-21 21:33:30,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977077122] [2020-12-21 21:33:30,265 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 21:33:30,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-21 21:33:30,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:30,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:33:30,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-21 21:33:30,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:30,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:33:30,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539785323] [2020-12-21 21:33:30,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:33:30,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:30,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:33:30,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:33:30,418 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 9 states. [2020-12-21 21:33:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:30,456 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-12-21 21:33:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:33:30,457 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-12-21 21:33:30,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:30,458 INFO L225 Difference]: With dead ends: 38 [2020-12-21 21:33:30,458 INFO L226 Difference]: Without dead ends: 24 [2020-12-21 21:33:30,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 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 21:33:30,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-21 21:33:30,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-21 21:33:30,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 21:33:30,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-21 21:33:30,464 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2020-12-21 21:33:30,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:30,464 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-21 21:33:30,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:33:30,464 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-21 21:33:30,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 21:33:30,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:30,465 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:30,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:33:30,681 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:30,682 INFO L82 PathProgramCache]: Analyzing trace with hash -846091049, now seen corresponding path program 6 times [2020-12-21 21:33:30,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:30,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769136350] [2020-12-21 21:33:30,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-21 21:33:30,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769136350] [2020-12-21 21:33:30,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620408218] [2020-12-21 21:33:30,761 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 21:33:30,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-21 21:33:30,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:30,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:33:30,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:30,887 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-21 21:33:30,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:30,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:33:30,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963450087] [2020-12-21 21:33:30,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:33:30,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:30,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:33:30,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:33:30,890 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2020-12-21 21:33:30,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:30,927 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-12-21 21:33:30,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:33:30,928 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-12-21 21:33:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:30,928 INFO L225 Difference]: With dead ends: 41 [2020-12-21 21:33:30,929 INFO L226 Difference]: Without dead ends: 26 [2020-12-21 21:33:30,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 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 21:33:30,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-21 21:33:30,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-21 21:33:30,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 21:33:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-21 21:33:30,934 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2020-12-21 21:33:30,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:30,934 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-21 21:33:30,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:33:30,934 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-21 21:33:30,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 21:33:30,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:30,935 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:31,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:31,149 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:31,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:31,151 INFO L82 PathProgramCache]: Analyzing trace with hash 401698902, now seen corresponding path program 7 times [2020-12-21 21:33:31,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:31,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947285919] [2020-12-21 21:33:31,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-21 21:33:31,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947285919] [2020-12-21 21:33:31,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440313429] [2020-12-21 21:33:31,254 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 21:33:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:31,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:33:31,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-21 21:33:31,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:31,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:33:31,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260974746] [2020-12-21 21:33:31,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:33:31,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:31,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:33:31,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:33:31,364 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 11 states. [2020-12-21 21:33:31,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:31,405 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-12-21 21:33:31,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:33:31,407 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-12-21 21:33:31,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:31,408 INFO L225 Difference]: With dead ends: 44 [2020-12-21 21:33:31,408 INFO L226 Difference]: Without dead ends: 28 [2020-12-21 21:33:31,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 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 21:33:31,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-21 21:33:31,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-21 21:33:31,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 21:33:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-21 21:33:31,415 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2020-12-21 21:33:31,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:31,415 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-21 21:33:31,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:33:31,416 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-21 21:33:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 21:33:31,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:31,416 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:31,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:31,619 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:31,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:31,621 INFO L82 PathProgramCache]: Analyzing trace with hash -88565897, now seen corresponding path program 8 times [2020-12-21 21:33:31,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:31,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140001005] [2020-12-21 21:33:31,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:33:31,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140001005] [2020-12-21 21:33:31,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857853464] [2020-12-21 21:33:31,745 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 21:33:31,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:33:31,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:31,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:33:31,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:33:31,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:31,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:33:31,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583757777] [2020-12-21 21:33:31,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:33:31,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:31,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:33:31,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:33:31,867 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 12 states. [2020-12-21 21:33:31,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:31,913 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-12-21 21:33:31,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:33:31,913 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-12-21 21:33:31,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:31,914 INFO L225 Difference]: With dead ends: 47 [2020-12-21 21:33:31,914 INFO L226 Difference]: Without dead ends: 30 [2020-12-21 21:33:31,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 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 21:33:31,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-21 21:33:31,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-21 21:33:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 21:33:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-21 21:33:31,920 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-12-21 21:33:31,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:31,920 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-21 21:33:31,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:33:31,920 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-21 21:33:31,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 21:33:31,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:31,921 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:32,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:33:32,136 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:32,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:32,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1068425418, now seen corresponding path program 9 times [2020-12-21 21:33:32,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:32,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773107817] [2020-12-21 21:33:32,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-21 21:33:32,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773107817] [2020-12-21 21:33:32,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368617538] [2020-12-21 21:33:32,259 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 21:33:32,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:33:32,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:32,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:33:32,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-21 21:33:32,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:32,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:33:32,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093589433] [2020-12-21 21:33:32,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:33:32,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:32,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:33:32,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:33:32,585 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2020-12-21 21:33:32,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:32,637 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-12-21 21:33:32,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:33:32,638 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-12-21 21:33:32,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:32,639 INFO L225 Difference]: With dead ends: 50 [2020-12-21 21:33:32,639 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 21:33:32,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:33:32,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 21:33:32,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-21 21:33:32,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 21:33:32,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-21 21:33:32,644 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2020-12-21 21:33:32,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:32,645 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-21 21:33:32,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:33:32,645 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-21 21:33:32,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:33:32,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:32,646 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:32,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:32,861 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:32,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:32,862 INFO L82 PathProgramCache]: Analyzing trace with hash 163359255, now seen corresponding path program 10 times [2020-12-21 21:33:32,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:32,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018969340] [2020-12-21 21:33:32,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-21 21:33:33,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018969340] [2020-12-21 21:33:33,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109887238] [2020-12-21 21:33:33,023 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 21:33:33,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:33:33,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:33,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:33:33,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-21 21:33:33,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:33,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:33:33,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829219687] [2020-12-21 21:33:33,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:33:33,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:33,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:33:33,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:33:33,156 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 14 states. [2020-12-21 21:33:33,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:33,227 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-12-21 21:33:33,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:33:33,228 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-12-21 21:33:33,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:33,229 INFO L225 Difference]: With dead ends: 53 [2020-12-21 21:33:33,229 INFO L226 Difference]: Without dead ends: 34 [2020-12-21 21:33:33,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:33:33,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-21 21:33:33,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-21 21:33:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 21:33:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-12-21 21:33:33,235 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2020-12-21 21:33:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:33,235 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-12-21 21:33:33,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:33:33,235 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-12-21 21:33:33,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 21:33:33,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:33,236 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:33,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:33,452 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:33,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:33,454 INFO L82 PathProgramCache]: Analyzing trace with hash 425322006, now seen corresponding path program 11 times [2020-12-21 21:33:33,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:33,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281233994] [2020-12-21 21:33:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-21 21:33:33,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281233994] [2020-12-21 21:33:33,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3223249] [2020-12-21 21:33:33,647 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 21:33:34,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-21 21:33:34,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:34,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:33:34,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-21 21:33:34,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:34,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:33:34,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093655872] [2020-12-21 21:33:34,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:33:34,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:34,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:33:34,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:33:34,166 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 15 states. [2020-12-21 21:33:34,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:34,223 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-12-21 21:33:34,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:33:34,223 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-12-21 21:33:34,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:34,224 INFO L225 Difference]: With dead ends: 56 [2020-12-21 21:33:34,224 INFO L226 Difference]: Without dead ends: 36 [2020-12-21 21:33:34,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 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 21:33:34,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-21 21:33:34,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-21 21:33:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 21:33:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-21 21:33:34,230 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-12-21 21:33:34,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:34,230 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-21 21:33:34,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:33:34,230 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-21 21:33:34,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 21:33:34,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:34,231 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:34,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:33:34,445 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:34,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:34,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1597250377, now seen corresponding path program 12 times [2020-12-21 21:33:34,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:34,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215858545] [2020-12-21 21:33:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-21 21:33:34,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215858545] [2020-12-21 21:33:34,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320896019] [2020-12-21 21:33:34,637 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 21:33:35,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:33:35,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:35,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:33:35,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-21 21:33:35,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:35,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 21:33:35,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702928891] [2020-12-21 21:33:35,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:33:35,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:35,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:33:35,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:33:35,266 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 16 states. [2020-12-21 21:33:35,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:35,325 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-12-21 21:33:35,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:33:35,325 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-12-21 21:33:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:35,326 INFO L225 Difference]: With dead ends: 59 [2020-12-21 21:33:35,326 INFO L226 Difference]: Without dead ends: 38 [2020-12-21 21:33:35,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:33:35,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-21 21:33:35,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-21 21:33:35,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 21:33:35,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-21 21:33:35,332 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 33 [2020-12-21 21:33:35,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:35,332 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-21 21:33:35,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:33:35,332 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-21 21:33:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 21:33:35,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:35,333 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:35,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:33:35,547 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:35,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:35,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1878902006, now seen corresponding path program 13 times [2020-12-21 21:33:35,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:35,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291468665] [2020-12-21 21:33:35,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-21 21:33:35,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291468665] [2020-12-21 21:33:35,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594944447] [2020-12-21 21:33:35,727 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 21:33:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:35,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:33:35,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-21 21:33:35,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:35,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:33:35,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833447614] [2020-12-21 21:33:35,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:33:35,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:35,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:33:35,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:33:35,861 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 17 states. [2020-12-21 21:33:35,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:35,922 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-12-21 21:33:35,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:33:35,922 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-12-21 21:33:35,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:35,923 INFO L225 Difference]: With dead ends: 62 [2020-12-21 21:33:35,939 INFO L226 Difference]: Without dead ends: 40 [2020-12-21 21:33:35,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 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 21:33:35,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-21 21:33:35,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-21 21:33:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 21:33:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-12-21 21:33:35,944 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2020-12-21 21:33:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:35,945 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-12-21 21:33:35,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:33:35,945 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-12-21 21:33:35,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-21 21:33:35,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:35,946 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:36,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:33:36,161 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:36,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:36,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1720993623, now seen corresponding path program 14 times [2020-12-21 21:33:36,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:36,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314474540] [2020-12-21 21:33:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-12-21 21:33:36,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314474540] [2020-12-21 21:33:36,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103547395] [2020-12-21 21:33:36,350 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 21:33:36,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:33:36,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:36,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:33:36,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-12-21 21:33:36,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:36,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:33:36,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878370839] [2020-12-21 21:33:36,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:33:36,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:36,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:33:36,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:33:36,475 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 18 states. [2020-12-21 21:33:36,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:36,544 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-12-21 21:33:36,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:33:36,545 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-12-21 21:33:36,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:36,546 INFO L225 Difference]: With dead ends: 65 [2020-12-21 21:33:36,546 INFO L226 Difference]: Without dead ends: 42 [2020-12-21 21:33:36,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 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 21:33:36,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-21 21:33:36,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-21 21:33:36,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-21 21:33:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-12-21 21:33:36,552 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2020-12-21 21:33:36,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:36,552 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-12-21 21:33:36,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:33:36,553 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-12-21 21:33:36,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 21:33:36,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:36,553 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:36,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:36,769 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:36,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:36,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1890499542, now seen corresponding path program 15 times [2020-12-21 21:33:36,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:36,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208826386] [2020-12-21 21:33:36,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:36,991 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-21 21:33:36,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208826386] [2020-12-21 21:33:36,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994252836] [2020-12-21 21:33:36,992 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 21:33:39,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-21 21:33:39,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:39,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:33:39,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:39,435 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-12-21 21:33:39,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:39,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-21 21:33:39,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413214899] [2020-12-21 21:33:39,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:33:39,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:39,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:33:39,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:33:39,440 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 19 states. [2020-12-21 21:33:39,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:39,530 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2020-12-21 21:33:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:33:39,531 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2020-12-21 21:33:39,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:39,532 INFO L225 Difference]: With dead ends: 68 [2020-12-21 21:33:39,532 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 21:33:39,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:33:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 21:33:39,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-21 21:33:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 21:33:39,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-12-21 21:33:39,538 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 39 [2020-12-21 21:33:39,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:39,539 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-12-21 21:33:39,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:33:39,539 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-12-21 21:33:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:33:39,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:39,540 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:39,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:33:39,755 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:39,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:39,756 INFO L82 PathProgramCache]: Analyzing trace with hash -498871817, now seen corresponding path program 16 times [2020-12-21 21:33:39,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:39,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124417432] [2020-12-21 21:33:39,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-12-21 21:33:39,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124417432] [2020-12-21 21:33:39,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758800902] [2020-12-21 21:33:39,983 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 21:33:40,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:33:40,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:40,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:33:40,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-12-21 21:33:40,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:40,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:33:40,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043244175] [2020-12-21 21:33:40,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:33:40,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:40,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:33:40,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:33:40,150 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 20 states. [2020-12-21 21:33:40,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:40,224 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2020-12-21 21:33:40,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:33:40,225 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-12-21 21:33:40,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:40,226 INFO L225 Difference]: With dead ends: 71 [2020-12-21 21:33:40,226 INFO L226 Difference]: Without dead ends: 46 [2020-12-21 21:33:40,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:33:40,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-21 21:33:40,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-21 21:33:40,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 21:33:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-21 21:33:40,234 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2020-12-21 21:33:40,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:40,234 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-21 21:33:40,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:33:40,234 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-21 21:33:40,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-21 21:33:40,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:40,236 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:40,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:33:40,446 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:40,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:40,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1197394614, now seen corresponding path program 17 times [2020-12-21 21:33:40,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:40,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328162193] [2020-12-21 21:33:40,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-21 21:33:40,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328162193] [2020-12-21 21:33:40,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148068723] [2020-12-21 21:33:40,721 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 21:33:48,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-21 21:33:48,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:48,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:33:48,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-12-21 21:33:48,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:48,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-21 21:33:48,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781065950] [2020-12-21 21:33:48,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:33:48,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:48,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:33:48,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:33:48,282 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 21 states. [2020-12-21 21:33:48,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:48,366 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-12-21 21:33:48,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 21:33:48,366 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2020-12-21 21:33:48,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:48,367 INFO L225 Difference]: With dead ends: 74 [2020-12-21 21:33:48,367 INFO L226 Difference]: Without dead ends: 48 [2020-12-21 21:33:48,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 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 21:33:48,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-21 21:33:48,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-21 21:33:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 21:33:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-12-21 21:33:48,373 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 43 [2020-12-21 21:33:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:48,374 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-12-21 21:33:48,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:33:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-12-21 21:33:48,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 21:33:48,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:48,375 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:48,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:33:48,589 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:48,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:48,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1535673495, now seen corresponding path program 18 times [2020-12-21 21:33:48,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:48,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619338310] [2020-12-21 21:33:48,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-12-21 21:33:48,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619338310] [2020-12-21 21:33:48,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519212682] [2020-12-21 21:33:48,882 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 21:33:55,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-21 21:33:55,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:55,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 21:33:55,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-12-21 21:33:55,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:55,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-21 21:33:55,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500442601] [2020-12-21 21:33:55,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 21:33:55,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:55,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 21:33:55,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:33:55,113 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 22 states. [2020-12-21 21:33:55,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:55,175 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2020-12-21 21:33:55,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 21:33:55,176 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-12-21 21:33:55,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:55,177 INFO L225 Difference]: With dead ends: 77 [2020-12-21 21:33:55,177 INFO L226 Difference]: Without dead ends: 50 [2020-12-21 21:33:55,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:33:55,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-21 21:33:55,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-21 21:33:55,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-21 21:33:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-12-21 21:33:55,182 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 45 [2020-12-21 21:33:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:55,183 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-12-21 21:33:55,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 21:33:55,183 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-12-21 21:33:55,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 21:33:55,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:55,184 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:55,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:55,385 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:55,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:55,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1082134122, now seen corresponding path program 19 times [2020-12-21 21:33:55,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:55,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330601254] [2020-12-21 21:33:55,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-21 21:33:55,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330601254] [2020-12-21 21:33:55,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346841124] [2020-12-21 21:33:55,705 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 21:33:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:55,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:33:55,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-21 21:33:55,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:55,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-21 21:33:55,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904160412] [2020-12-21 21:33:55,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:33:55,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:55,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:33:55,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:33:55,853 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 23 states. [2020-12-21 21:33:55,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:55,934 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2020-12-21 21:33:55,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:33:55,935 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 47 [2020-12-21 21:33:55,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:55,936 INFO L225 Difference]: With dead ends: 80 [2020-12-21 21:33:55,937 INFO L226 Difference]: Without dead ends: 52 [2020-12-21 21:33:55,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 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 21:33:55,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-21 21:33:55,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-21 21:33:55,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-21 21:33:55,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-12-21 21:33:55,957 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2020-12-21 21:33:55,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:55,957 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-12-21 21:33:55,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:33:55,957 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-12-21 21:33:55,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 21:33:55,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:55,958 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:56,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:33:56,172 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:56,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:56,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1164943561, now seen corresponding path program 20 times [2020-12-21 21:33:56,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:56,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018417910] [2020-12-21 21:33:56,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:33:56,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018417910] [2020-12-21 21:33:56,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706975230] [2020-12-21 21:33:56,554 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 21:33:56,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:33:56,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:33:56,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:33:56,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:33:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:33:56,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:33:56,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-21 21:33:56,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684314240] [2020-12-21 21:33:56,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:33:56,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:33:56,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:33:56,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:33:56,696 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 24 states. [2020-12-21 21:33:56,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:33:56,780 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2020-12-21 21:33:56,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:33:56,781 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2020-12-21 21:33:56,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:33:56,781 INFO L225 Difference]: With dead ends: 83 [2020-12-21 21:33:56,781 INFO L226 Difference]: Without dead ends: 54 [2020-12-21 21:33:56,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 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 21:33:56,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-21 21:33:56,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-21 21:33:56,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 21:33:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-12-21 21:33:56,787 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 49 [2020-12-21 21:33:56,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:33:56,787 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-12-21 21:33:56,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:33:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-12-21 21:33:56,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 21:33:56,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:33:56,788 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:33:57,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 21:33:57,004 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:33:57,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:33:57,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1677996150, now seen corresponding path program 21 times [2020-12-21 21:33:57,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:33:57,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116123457] [2020-12-21 21:33:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:33:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:33:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-21 21:33:57,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116123457] [2020-12-21 21:33:57,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950239856] [2020-12-21 21:33:57,393 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 21:34:04,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-21 21:34:04,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:04,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 21:34:04,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-12-21 21:34:04,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:04,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-21 21:34:04,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929514794] [2020-12-21 21:34:04,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 21:34:04,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:04,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 21:34:04,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:34:04,392 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 25 states. [2020-12-21 21:34:04,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:04,478 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2020-12-21 21:34:04,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 21:34:04,479 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-12-21 21:34:04,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:04,480 INFO L225 Difference]: With dead ends: 86 [2020-12-21 21:34:04,480 INFO L226 Difference]: Without dead ends: 56 [2020-12-21 21:34:04,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:34:04,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-21 21:34:04,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-21 21:34:04,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 21:34:04,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-12-21 21:34:04,484 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2020-12-21 21:34:04,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:04,485 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-12-21 21:34:04,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 21:34:04,485 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-12-21 21:34:04,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 21:34:04,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:04,485 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:04,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:34:04,701 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:04,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1745445335, now seen corresponding path program 22 times [2020-12-21 21:34:04,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:04,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616469602] [2020-12-21 21:34:04,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-21 21:34:05,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616469602] [2020-12-21 21:34:05,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450094432] [2020-12-21 21:34:05,147 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 21:34:05,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:34:05,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:05,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:34:05,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-21 21:34:05,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:05,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-21 21:34:05,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34942861] [2020-12-21 21:34:05,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:34:05,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:05,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:34:05,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:34:05,307 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 26 states. [2020-12-21 21:34:05,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:05,414 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2020-12-21 21:34:05,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 21:34:05,414 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 53 [2020-12-21 21:34:05,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:05,415 INFO L225 Difference]: With dead ends: 89 [2020-12-21 21:34:05,415 INFO L226 Difference]: Without dead ends: 58 [2020-12-21 21:34:05,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:34:05,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-21 21:34:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-21 21:34:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-21 21:34:05,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-12-21 21:34:05,421 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2020-12-21 21:34:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:05,421 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-12-21 21:34:05,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:34:05,421 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-12-21 21:34:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-21 21:34:05,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:05,422 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:05,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:05,636 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:05,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:05,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1621260458, now seen corresponding path program 23 times [2020-12-21 21:34:05,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:05,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204651137] [2020-12-21 21:34:05,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-12-21 21:34:06,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204651137] [2020-12-21 21:34:06,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234583400] [2020-12-21 21:34:06,058 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 21:35:39,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-21 21:35:39,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:35:39,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 21:35:39,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:35:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-12-21 21:35:39,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:35:39,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-21 21:35:39,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267798579] [2020-12-21 21:35:39,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 21:35:39,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:35:39,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 21:35:39,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:35:39,643 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 27 states. [2020-12-21 21:35:39,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:35:39,747 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-12-21 21:35:39,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:35:39,748 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2020-12-21 21:35:39,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:35:39,748 INFO L225 Difference]: With dead ends: 92 [2020-12-21 21:35:39,749 INFO L226 Difference]: Without dead ends: 60 [2020-12-21 21:35:39,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:35:39,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-21 21:35:39,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-21 21:35:39,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-21 21:35:39,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-12-21 21:35:39,753 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 55 [2020-12-21 21:35:39,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:35:39,753 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-12-21 21:35:39,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 21:35:39,753 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-12-21 21:35:39,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-21 21:35:39,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:35:39,754 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:35:39,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 21:35:39,970 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:35:39,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:35:39,971 INFO L82 PathProgramCache]: Analyzing trace with hash 757173367, now seen corresponding path program 24 times [2020-12-21 21:35:39,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:35:39,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201829288] [2020-12-21 21:35:39,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:35:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:35:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-12-21 21:35:40,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201829288] [2020-12-21 21:35:40,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398983745] [2020-12-21 21:35:40,461 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 21:36:24,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:36:24,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:36:24,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 21:36:24,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:36:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-12-21 21:36:25,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:36:25,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-21 21:36:25,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808033920] [2020-12-21 21:36:25,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 21:36:25,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:36:25,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 21:36:25,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:36:25,048 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 28 states. [2020-12-21 21:36:25,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:36:25,153 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2020-12-21 21:36:25,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 21:36:25,153 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 57 [2020-12-21 21:36:25,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:36:25,154 INFO L225 Difference]: With dead ends: 95 [2020-12-21 21:36:25,154 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:36:25,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:36:25,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:36:25,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-21 21:36:25,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-21 21:36:25,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-12-21 21:36:25,159 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 57 [2020-12-21 21:36:25,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:36:25,159 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-12-21 21:36:25,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 21:36:25,159 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-12-21 21:36:25,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 21:36:25,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:36:25,160 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:36:25,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:36:25,367 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:36:25,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:36:25,368 INFO L82 PathProgramCache]: Analyzing trace with hash -612501962, now seen corresponding path program 25 times [2020-12-21 21:36:25,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:36:25,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578639418] [2020-12-21 21:36:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:36:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:36:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-12-21 21:36:25,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578639418] [2020-12-21 21:36:25,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323737141] [2020-12-21 21:36:25,959 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 21:36:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:36:26,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 21:36:26,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:36:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2020-12-21 21:36:26,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:36:26,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-21 21:36:26,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457522551] [2020-12-21 21:36:26,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:36:26,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:36:26,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:36:26,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:36:26,136 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 29 states. [2020-12-21 21:36:26,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:36:26,245 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2020-12-21 21:36:26,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 21:36:26,246 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 59 [2020-12-21 21:36:26,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:36:26,247 INFO L225 Difference]: With dead ends: 98 [2020-12-21 21:36:26,247 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 21:36:26,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:36:26,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 21:36:26,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-21 21:36:26,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-21 21:36:26,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-12-21 21:36:26,252 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2020-12-21 21:36:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:36:26,252 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-12-21 21:36:26,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:36:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-12-21 21:36:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 21:36:26,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:36:26,253 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:36:26,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 21:36:26,466 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:36:26,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:36:26,467 INFO L82 PathProgramCache]: Analyzing trace with hash 327606039, now seen corresponding path program 26 times [2020-12-21 21:36:26,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:36:26,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108185774] [2020-12-21 21:36:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:36:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:36:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-12-21 21:36:27,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108185774] [2020-12-21 21:36:27,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960953604] [2020-12-21 21:36:27,027 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 21:36:27,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:36:27,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:36:27,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-21 21:36:27,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:36:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-12-21 21:36:27,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:36:27,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-21 21:36:27,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111520323] [2020-12-21 21:36:27,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:36:27,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:36:27,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:36:27,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:36:27,202 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 30 states. [2020-12-21 21:36:27,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:36:27,310 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2020-12-21 21:36:27,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 21:36:27,311 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 61 [2020-12-21 21:36:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:36:27,311 INFO L225 Difference]: With dead ends: 101 [2020-12-21 21:36:27,312 INFO L226 Difference]: Without dead ends: 66 [2020-12-21 21:36:27,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 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 21:36:27,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-21 21:36:27,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-21 21:36:27,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 21:36:27,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-12-21 21:36:27,321 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 61 [2020-12-21 21:36:27,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:36:27,321 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-12-21 21:36:27,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:36:27,321 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-12-21 21:36:27,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 21:36:27,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:36:27,322 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:36:27,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 21:36:27,527 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:36:27,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:36:27,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1579713258, now seen corresponding path program 27 times [2020-12-21 21:36:27,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:36:27,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023673285] [2020-12-21 21:36:27,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:36:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:36:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-21 21:36:28,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023673285] [2020-12-21 21:36:28,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819145284] [2020-12-21 21:36:28,057 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 21:36:43,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-21 21:36:43,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:36:43,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-21 21:36:43,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:36:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 27 proven. 378 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-12-21 21:36:43,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:36:43,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 32 [2020-12-21 21:36:43,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865568391] [2020-12-21 21:36:43,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 21:36:43,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:36:43,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 21:36:43,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:36:43,656 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 32 states. [2020-12-21 21:36:43,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:36:43,770 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2020-12-21 21:36:43,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 21:36:43,771 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2020-12-21 21:36:43,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:36:43,772 INFO L225 Difference]: With dead ends: 104 [2020-12-21 21:36:43,772 INFO L226 Difference]: Without dead ends: 68 [2020-12-21 21:36:43,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 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 21:36:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-21 21:36:43,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-12-21 21:36:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-21 21:36:43,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-12-21 21:36:43,777 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 63 [2020-12-21 21:36:43,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:36:43,777 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-12-21 21:36:43,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 21:36:43,777 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-12-21 21:36:43,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-21 21:36:43,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:36:43,778 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:36:43,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 21:36:43,979 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:36:43,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:36:43,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1164401079, now seen corresponding path program 28 times [2020-12-21 21:36:43,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:36:43,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980966911] [2020-12-21 21:36:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:36:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:36:44,553 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-12-21 21:36:44,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980966911] [2020-12-21 21:36:44,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961424223] [2020-12-21 21:36:44,554 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 21:36:44,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:36:44,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:36:44,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 21:36:44,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:36:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-12-21 21:36:44,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:36:44,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-21 21:36:44,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015861174] [2020-12-21 21:36:44,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 21:36:44,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:36:44,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 21:36:44,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:36:44,752 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 32 states. [2020-12-21 21:36:44,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:36:44,913 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2020-12-21 21:36:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 21:36:44,914 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 65 [2020-12-21 21:36:44,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:36:44,914 INFO L225 Difference]: With dead ends: 107 [2020-12-21 21:36:44,914 INFO L226 Difference]: Without dead ends: 70 [2020-12-21 21:36:44,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 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 21:36:44,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-21 21:36:44,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-12-21 21:36:44,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-21 21:36:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-12-21 21:36:44,920 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2020-12-21 21:36:44,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:36:44,920 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-12-21 21:36:44,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 21:36:44,920 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-12-21 21:36:44,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-21 21:36:44,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:36:44,921 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:36:45,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:36:45,137 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:36:45,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:36:45,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1151591434, now seen corresponding path program 29 times [2020-12-21 21:36:45,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:36:45,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334139671] [2020-12-21 21:36:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:36:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:36:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2020-12-21 21:36:45,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334139671] [2020-12-21 21:36:45,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870401027] [2020-12-21 21:36:45,776 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