/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/sanfoundry_27_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:19:50,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:19:50,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:19:50,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 21:19:50,659 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:19:50,718 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:19:50,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:19:50,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:19:50,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:19:50,724 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:19:50,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:19:50,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:19:50,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:19:50,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:19:50,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:19:50,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:19:50,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:19:50,727 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:19:50,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:19:50,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:19:50,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:19:50,728 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:19:50,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:19:50,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:19:50,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:19:50,729 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:19:50,729 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:19:50,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:19:50,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:19:50,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:19:50,730 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:19:51,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:19:51,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:19:51,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:19:51,235 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:19:51,236 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:19:51,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sanfoundry_27_ground.i [2020-12-21 21:19:51,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd021f29d/b6f39dc20c914410b05b6323d8cb2ae7/FLAG260368caf [2020-12-21 21:19:51,943 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:19:51,944 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_27_ground.i [2020-12-21 21:19:51,950 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd021f29d/b6f39dc20c914410b05b6323d8cb2ae7/FLAG260368caf [2020-12-21 21:19:52,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd021f29d/b6f39dc20c914410b05b6323d8cb2ae7 [2020-12-21 21:19:52,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:19:52,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:19:52,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:19:52,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:19:52,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:19:52,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@386f7e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52, skipping insertion in model container [2020-12-21 21:19:52,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:19:52,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:19:52,517 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/sanfoundry_27_ground.i[813,826] [2020-12-21 21:19:52,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:19:52,544 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:19:52,561 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/sanfoundry_27_ground.i[813,826] [2020-12-21 21:19:52,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:19:52,587 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:19:52,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52 WrapperNode [2020-12-21 21:19:52,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:19:52,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:19:52,590 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:19:52,590 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:19:52,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,634 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:19:52,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:19:52,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:19:52,635 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:19:52,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:19:52,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:19:52,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:19:52,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:19:52,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (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 21:19:52,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:19:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:19:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:19:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:19:52,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:19:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:19:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:19:53,182 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:19:53,183 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-21 21:19:53,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:19:53 BoogieIcfgContainer [2020-12-21 21:19:53,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:19:53,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:19:53,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:19:53,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:19:53,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:19:52" (1/3) ... [2020-12-21 21:19:53,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d0f219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:19:53, skipping insertion in model container [2020-12-21 21:19:53,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (2/3) ... [2020-12-21 21:19:53,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d0f219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:19:53, skipping insertion in model container [2020-12-21 21:19:53,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:19:53" (3/3) ... [2020-12-21 21:19:53,211 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_27_ground.i [2020-12-21 21:19:53,219 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:19:53,224 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:19:53,247 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:19:53,286 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:19:53,286 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:19:53,286 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:19:53,287 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:19:53,287 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:19:53,288 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:19:53,288 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:19:53,288 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:19:53,308 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-21 21:19:53,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:19:53,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:53,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:53,317 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:53,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:53,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2006137184, now seen corresponding path program 1 times [2020-12-21 21:19:53,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:53,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039837651] [2020-12-21 21:19:53,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:53,526 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 21:19:53,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039837651] [2020-12-21 21:19:53,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:53,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:19:53,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278130347] [2020-12-21 21:19:53,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:19:53,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:53,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:19:53,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:19:53,559 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-21 21:19:53,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:53,582 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2020-12-21 21:19:53,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:19:53,584 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-21 21:19:53,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:53,595 INFO L225 Difference]: With dead ends: 34 [2020-12-21 21:19:53,595 INFO L226 Difference]: Without dead ends: 15 [2020-12-21 21:19:53,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:19:53,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-21 21:19:53,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-21 21:19:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-21 21:19:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-21 21:19:53,644 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2020-12-21 21:19:53,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:53,645 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-21 21:19:53,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:19:53,645 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-21 21:19:53,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:19:53,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:53,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:53,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:19:53,647 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:53,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:53,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2016295915, now seen corresponding path program 1 times [2020-12-21 21:19:53,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:53,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10128598] [2020-12-21 21:19:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:53,750 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 21:19:53,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10128598] [2020-12-21 21:19:53,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:53,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:19:53,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668147774] [2020-12-21 21:19:53,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:53,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:53,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:53,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:19:53,757 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2020-12-21 21:19:53,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:53,798 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-12-21 21:19:53,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:53,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-21 21:19:53,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:53,800 INFO L225 Difference]: With dead ends: 28 [2020-12-21 21:19:53,801 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 21:19:53,802 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 21:19:53,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 21:19:53,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-12-21 21:19:53,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-21 21:19:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-12-21 21:19:53,808 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2020-12-21 21:19:53,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:53,808 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-12-21 21:19:53,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:53,809 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-12-21 21:19:53,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 21:19:53,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:53,810 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:53,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:19:53,810 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:53,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:53,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1564799315, now seen corresponding path program 1 times [2020-12-21 21:19:53,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:53,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402202312] [2020-12-21 21:19:53,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:53,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402202312] [2020-12-21 21:19:53,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116442074] [2020-12-21 21:19:53,921 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 21:19:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:19:54,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:54,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:19:54,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:19:54,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2020-12-21 21:19:54,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459925316] [2020-12-21 21:19:54,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:54,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:54,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:19:54,126 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2020-12-21 21:19:54,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,183 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-12-21 21:19:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:54,184 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-21 21:19:54,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,195 INFO L225 Difference]: With dead ends: 27 [2020-12-21 21:19:54,195 INFO L226 Difference]: Without dead ends: 20 [2020-12-21 21:19:54,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:19:54,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-21 21:19:54,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-12-21 21:19:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 21:19:54,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-21 21:19:54,205 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2020-12-21 21:19:54,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,206 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-21 21:19:54,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:54,206 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-21 21:19:54,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 21:19:54,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:54,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 21:19:54,421 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,421 INFO L82 PathProgramCache]: Analyzing trace with hash -324137903, now seen corresponding path program 1 times [2020-12-21 21:19:54,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333461717] [2020-12-21 21:19:54,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,521 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 21:19:54,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333461717] [2020-12-21 21:19:54,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407666661] [2020-12-21 21:19:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:19:54,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:54,689 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 21:19:54,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:54,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:19:54,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575025334] [2020-12-21 21:19:54,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:19:54,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:19:54,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,694 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-12-21 21:19:54,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,749 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-12-21 21:19:54,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:19:54,750 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-21 21:19:54,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,751 INFO L225 Difference]: With dead ends: 34 [2020-12-21 21:19:54,751 INFO L226 Difference]: Without dead ends: 22 [2020-12-21 21:19:54,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 21:19:54,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-21 21:19:54,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-12-21 21:19:54,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 21:19:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-21 21:19:54,756 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2020-12-21 21:19:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,756 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-21 21:19:54,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:19:54,757 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-21 21:19:54,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 21:19:54,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,758 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:54,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:54,973 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1157925421, now seen corresponding path program 2 times [2020-12-21 21:19:54,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754345935] [2020-12-21 21:19:54,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:19:55,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754345935] [2020-12-21 21:19:55,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359309730] [2020-12-21 21:19:55,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:19:55,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:55,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:19:55,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:19:55,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:55,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2020-12-21 21:19:55,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443956815] [2020-12-21 21:19:55,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:19:55,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:19:55,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:19:55,123 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 6 states. [2020-12-21 21:19:55,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:55,172 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2020-12-21 21:19:55,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:19:55,173 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-21 21:19:55,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:55,174 INFO L225 Difference]: With dead ends: 39 [2020-12-21 21:19:55,174 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 21:19:55,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:19:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 21:19:55,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-21 21:19:55,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 21:19:55,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-21 21:19:55,180 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2020-12-21 21:19:55,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:55,181 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-21 21:19:55,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:19:55,181 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-21 21:19:55,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 21:19:55,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:55,182 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:55,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,396 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:55,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:55,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1946849393, now seen corresponding path program 3 times [2020-12-21 21:19:55,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:55,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991221799] [2020-12-21 21:19:55,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 21:19:55,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991221799] [2020-12-21 21:19:55,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401093613] [2020-12-21 21:19:55,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:19:55,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:55,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:19:55,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:55,559 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 21:19:55,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:55,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:19:55,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046053160] [2020-12-21 21:19:55,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:19:55,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:19:55,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:19:55,565 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2020-12-21 21:19:55,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:55,626 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2020-12-21 21:19:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:19:55,627 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-21 21:19:55,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:55,629 INFO L225 Difference]: With dead ends: 37 [2020-12-21 21:19:55,629 INFO L226 Difference]: Without dead ends: 30 [2020-12-21 21:19:55,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:19:55,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-21 21:19:55,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-12-21 21:19:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 21:19:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-12-21 21:19:55,645 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 21 [2020-12-21 21:19:55,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:55,645 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-12-21 21:19:55,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:19:55,646 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-12-21 21:19:55,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 21:19:55,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:55,647 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:55,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,863 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:55,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:55,865 INFO L82 PathProgramCache]: Analyzing trace with hash 962598037, now seen corresponding path program 4 times [2020-12-21 21:19:55,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:55,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184830257] [2020-12-21 21:19:55,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:19:55,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184830257] [2020-12-21 21:19:55,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078569449] [2020-12-21 21:19:55,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:19:56,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:56,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:19:56,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:19:56,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:56,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:19:56,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103478473] [2020-12-21 21:19:56,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:19:56,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:56,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:19:56,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:19:56,093 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 7 states. [2020-12-21 21:19:56,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:56,150 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2020-12-21 21:19:56,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:19:56,151 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-12-21 21:19:56,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:56,152 INFO L225 Difference]: With dead ends: 50 [2020-12-21 21:19:56,152 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 21:19:56,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 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 21:19:56,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 21:19:56,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-12-21 21:19:56,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 21:19:56,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-12-21 21:19:56,158 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 24 [2020-12-21 21:19:56,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:56,158 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-12-21 21:19:56,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:19:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-12-21 21:19:56,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 21:19:56,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:56,159 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:56,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-21 21:19:56,374 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:56,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:56,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1260321897, now seen corresponding path program 5 times [2020-12-21 21:19:56,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:56,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212512593] [2020-12-21 21:19:56,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:19:56,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212512593] [2020-12-21 21:19:56,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232361282] [2020-12-21 21:19:56,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-21 21:19:56,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:56,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:19:56,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-21 21:19:56,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:56,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2020-12-21 21:19:56,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268869133] [2020-12-21 21:19:56,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:19:56,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:56,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:19:56,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:19:56,621 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 7 states. [2020-12-21 21:19:56,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:56,680 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2020-12-21 21:19:56,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:19:56,681 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-12-21 21:19:56,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:56,681 INFO L225 Difference]: With dead ends: 55 [2020-12-21 21:19:56,682 INFO L226 Difference]: Without dead ends: 37 [2020-12-21 21:19:56,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:19:56,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-21 21:19:56,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-12-21 21:19:56,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 21:19:56,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-12-21 21:19:56,687 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 26 [2020-12-21 21:19:56,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:56,687 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-12-21 21:19:56,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:19:56,688 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-12-21 21:19:56,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 21:19:56,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:56,689 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:56,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,903 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:56,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:56,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1241135669, now seen corresponding path program 6 times [2020-12-21 21:19:56,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:56,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807072312] [2020-12-21 21:19:56,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:57,002 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-21 21:19:57,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807072312] [2020-12-21 21:19:57,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731303665] [2020-12-21 21:19:57,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:57,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-21 21:19:57,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:57,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:19:57,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-21 21:19:57,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:57,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2020-12-21 21:19:57,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409657316] [2020-12-21 21:19:57,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:19:57,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:57,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:19:57,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:19:57,112 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 8 states. [2020-12-21 21:19:57,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:57,174 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2020-12-21 21:19:57,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:19:57,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-12-21 21:19:57,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:57,175 INFO L225 Difference]: With dead ends: 63 [2020-12-21 21:19:57,175 INFO L226 Difference]: Without dead ends: 42 [2020-12-21 21:19:57,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:19:57,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-21 21:19:57,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-12-21 21:19:57,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 21:19:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-12-21 21:19:57,181 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 31 [2020-12-21 21:19:57,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:57,181 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-12-21 21:19:57,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:19:57,182 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-12-21 21:19:57,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 21:19:57,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:57,183 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:57,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:57,397 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:57,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:57,398 INFO L82 PathProgramCache]: Analyzing trace with hash 78567771, now seen corresponding path program 7 times [2020-12-21 21:19:57,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:57,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613371519] [2020-12-21 21:19:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:19:57,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613371519] [2020-12-21 21:19:57,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44747309] [2020-12-21 21:19:57,503 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 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 21:19:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:57,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:19:57,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:19:57,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:57,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:19:57,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266907952] [2020-12-21 21:19:57,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:19:57,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:57,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:19:57,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:19:57,620 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 10 states. [2020-12-21 21:19:57,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:57,704 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2020-12-21 21:19:57,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:19:57,705 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-12-21 21:19:57,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:57,706 INFO L225 Difference]: With dead ends: 71 [2020-12-21 21:19:57,706 INFO L226 Difference]: Without dead ends: 47 [2020-12-21 21:19:57,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 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 21:19:57,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-21 21:19:57,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-12-21 21:19:57,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 21:19:57,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-12-21 21:19:57,712 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 36 [2020-12-21 21:19:57,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:57,712 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-12-21 21:19:57,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:19:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-12-21 21:19:57,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:19:57,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:57,714 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:57,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 21:19:57,929 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:57,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:57,930 INFO L82 PathProgramCache]: Analyzing trace with hash 266712071, now seen corresponding path program 8 times [2020-12-21 21:19:57,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:57,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119164058] [2020-12-21 21:19:57,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:19:58,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119164058] [2020-12-21 21:19:58,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314558347] [2020-12-21 21:19:58,086 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 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 21:19:58,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:19:58,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:58,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:19:58,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:19:58,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:58,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:19:58,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341542703] [2020-12-21 21:19:58,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:19:58,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:58,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:19:58,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:19:58,218 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 11 states. [2020-12-21 21:19:58,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:58,310 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2020-12-21 21:19:58,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:19:58,311 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-12-21 21:19:58,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:58,312 INFO L225 Difference]: With dead ends: 79 [2020-12-21 21:19:58,312 INFO L226 Difference]: Without dead ends: 52 [2020-12-21 21:19:58,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 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 21:19:58,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-21 21:19:58,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-12-21 21:19:58,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-21 21:19:58,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2020-12-21 21:19:58,318 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 41 [2020-12-21 21:19:58,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:58,319 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2020-12-21 21:19:58,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:19:58,319 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2020-12-21 21:19:58,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 21:19:58,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:58,320 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:58,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:58,535 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:58,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:58,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1334495457, now seen corresponding path program 9 times [2020-12-21 21:19:58,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:58,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070793582] [2020-12-21 21:19:58,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:19:58,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070793582] [2020-12-21 21:19:58,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262524527] [2020-12-21 21:19:58,644 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 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 21:19:58,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-21 21:19:58,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:58,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:19:58,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-21 21:19:58,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:58,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2020-12-21 21:19:58,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046495276] [2020-12-21 21:19:58,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:19:58,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:58,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:19:58,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:19:58,838 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 11 states. [2020-12-21 21:19:58,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:58,932 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2020-12-21 21:19:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:19:58,933 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-12-21 21:19:58,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:58,934 INFO L225 Difference]: With dead ends: 87 [2020-12-21 21:19:58,934 INFO L226 Difference]: Without dead ends: 57 [2020-12-21 21:19:58,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:19:58,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-21 21:19:58,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-12-21 21:19:58,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 21:19:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-12-21 21:19:58,941 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 46 [2020-12-21 21:19:58,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:58,941 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-12-21 21:19:58,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:19:58,941 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-12-21 21:19:58,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 21:19:58,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:58,942 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:59,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:59,157 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:59,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:59,159 INFO L82 PathProgramCache]: Analyzing trace with hash 134543939, now seen corresponding path program 10 times [2020-12-21 21:19:59,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:59,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669766923] [2020-12-21 21:19:59,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:19:59,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669766923] [2020-12-21 21:19:59,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285096773] [2020-12-21 21:19:59,283 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 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 21:19:59,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:19:59,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:59,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:19:59,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:19:59,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:59,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:19:59,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128576910] [2020-12-21 21:19:59,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:19:59,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:59,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:19:59,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:19:59,436 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 13 states. [2020-12-21 21:19:59,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:59,553 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2020-12-21 21:19:59,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:19:59,554 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-12-21 21:19:59,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:59,555 INFO L225 Difference]: With dead ends: 95 [2020-12-21 21:19:59,555 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:19:59,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 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 21:19:59,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:19:59,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-12-21 21:19:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 21:19:59,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-12-21 21:19:59,578 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 51 [2020-12-21 21:19:59,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:59,578 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-12-21 21:19:59,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:19:59,579 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-12-21 21:19:59,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 21:19:59,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:59,580 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:59,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:19:59,781 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:59,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:59,782 INFO L82 PathProgramCache]: Analyzing trace with hash 642014435, now seen corresponding path program 11 times [2020-12-21 21:19:59,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:59,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502336938] [2020-12-21 21:19:59,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-21 21:19:59,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502336938] [2020-12-21 21:19:59,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997051758] [2020-12-21 21:19:59,938 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 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 21:20:00,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-21 21:20:00,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:00,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:20:00,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-21 21:20:00,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:00,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2020-12-21 21:20:00,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071334138] [2020-12-21 21:20:00,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:20:00,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:00,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:20:00,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:20:00,162 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 13 states. [2020-12-21 21:20:00,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:00,260 INFO L93 Difference]: Finished difference Result 103 states and 128 transitions. [2020-12-21 21:20:00,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:20:00,261 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-12-21 21:20:00,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:00,261 INFO L225 Difference]: With dead ends: 103 [2020-12-21 21:20:00,262 INFO L226 Difference]: Without dead ends: 67 [2020-12-21 21:20:00,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:20:00,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-21 21:20:00,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-12-21 21:20:00,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-21 21:20:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2020-12-21 21:20:00,268 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 56 [2020-12-21 21:20:00,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:00,268 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2020-12-21 21:20:00,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:20:00,268 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2020-12-21 21:20:00,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 21:20:00,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:00,269 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:00,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:20:00,484 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:00,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:00,485 INFO L82 PathProgramCache]: Analyzing trace with hash 47405183, now seen corresponding path program 12 times [2020-12-21 21:20:00,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:00,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625339741] [2020-12-21 21:20:00,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-21 21:20:00,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625339741] [2020-12-21 21:20:00,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136155811] [2020-12-21 21:20:00,642 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 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 21:20:00,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-12-21 21:20:00,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:00,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:20:00,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-21 21:20:01,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:01,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:20:01,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410752480] [2020-12-21 21:20:01,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:20:01,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:01,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:20:01,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:20:01,105 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 15 states. [2020-12-21 21:20:01,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:01,229 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2020-12-21 21:20:01,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:20:01,230 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-12-21 21:20:01,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:01,231 INFO L225 Difference]: With dead ends: 111 [2020-12-21 21:20:01,231 INFO L226 Difference]: Without dead ends: 72 [2020-12-21 21:20:01,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:20:01,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-21 21:20:01,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-12-21 21:20:01,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-21 21:20:01,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-12-21 21:20:01,236 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 61 [2020-12-21 21:20:01,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:01,237 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-12-21 21:20:01,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:20:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-12-21 21:20:01,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-21 21:20:01,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:01,238 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:01,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:20:01,447 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:01,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2144564569, now seen corresponding path program 13 times [2020-12-21 21:20:01,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:01,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600525600] [2020-12-21 21:20:01,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-21 21:20:01,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600525600] [2020-12-21 21:20:01,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405713231] [2020-12-21 21:20:01,667 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 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 21:20:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:01,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:20:01,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-21 21:20:01,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:01,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 21:20:01,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85155626] [2020-12-21 21:20:01,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:20:01,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:01,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:20:01,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:20:01,828 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 16 states. [2020-12-21 21:20:02,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:02,043 INFO L93 Difference]: Finished difference Result 119 states and 148 transitions. [2020-12-21 21:20:02,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:20:02,044 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2020-12-21 21:20:02,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:02,045 INFO L225 Difference]: With dead ends: 119 [2020-12-21 21:20:02,046 INFO L226 Difference]: Without dead ends: 77 [2020-12-21 21:20:02,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 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 21:20:02,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-21 21:20:02,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-12-21 21:20:02,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-21 21:20:02,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2020-12-21 21:20:02,057 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 66 [2020-12-21 21:20:02,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:02,058 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2020-12-21 21:20:02,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:20:02,058 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2020-12-21 21:20:02,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 21:20:02,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:02,059 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:02,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:02,271 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:02,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:02,272 INFO L82 PathProgramCache]: Analyzing trace with hash 381718203, now seen corresponding path program 14 times [2020-12-21 21:20:02,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:02,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339346737] [2020-12-21 21:20:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:20:02,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339346737] [2020-12-21 21:20:02,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459200982] [2020-12-21 21:20:02,559 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 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 21:20:02,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:02,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:02,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:20:02,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-21 21:20:02,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:02,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:20:02,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017352180] [2020-12-21 21:20:02,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:20:02,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:02,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:20:02,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:20:02,790 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 17 states. [2020-12-21 21:20:02,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:02,954 INFO L93 Difference]: Finished difference Result 127 states and 158 transitions. [2020-12-21 21:20:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:20:02,955 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-12-21 21:20:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:02,956 INFO L225 Difference]: With dead ends: 127 [2020-12-21 21:20:02,956 INFO L226 Difference]: Without dead ends: 82 [2020-12-21 21:20:02,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:20:02,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-21 21:20:02,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-12-21 21:20:02,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-21 21:20:02,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2020-12-21 21:20:02,969 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 71 [2020-12-21 21:20:02,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:02,970 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2020-12-21 21:20:02,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:20:02,970 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2020-12-21 21:20:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-21 21:20:02,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:02,975 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:03,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:20:03,176 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:03,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:03,177 INFO L82 PathProgramCache]: Analyzing trace with hash -935460757, now seen corresponding path program 15 times [2020-12-21 21:20:03,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:03,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452584462] [2020-12-21 21:20:03,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-21 21:20:03,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452584462] [2020-12-21 21:20:03,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046195691] [2020-12-21 21:20:03,512 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 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 21:20:03,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-21 21:20:03,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:03,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:20:03,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-12-21 21:20:03,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:03,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2020-12-21 21:20:03,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101707443] [2020-12-21 21:20:03,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:20:03,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:03,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:20:03,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:20:03,864 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 17 states. [2020-12-21 21:20:03,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:03,977 INFO L93 Difference]: Finished difference Result 135 states and 168 transitions. [2020-12-21 21:20:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:20:03,980 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-12-21 21:20:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:03,981 INFO L225 Difference]: With dead ends: 135 [2020-12-21 21:20:03,981 INFO L226 Difference]: Without dead ends: 87 [2020-12-21 21:20:03,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:20:03,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-21 21:20:03,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2020-12-21 21:20:03,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-21 21:20:03,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-12-21 21:20:03,986 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 76 [2020-12-21 21:20:03,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:03,986 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-12-21 21:20:03,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:20:03,986 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-12-21 21:20:03,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 21:20:03,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:03,987 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:04,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:20:04,201 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:04,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:04,202 INFO L82 PathProgramCache]: Analyzing trace with hash -935568137, now seen corresponding path program 16 times [2020-12-21 21:20:04,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:04,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986491640] [2020-12-21 21:20:04,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-21 21:20:04,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986491640] [2020-12-21 21:20:04,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712510383] [2020-12-21 21:20:04,432 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 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 21:20:04,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:04,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:04,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:20:04,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-21 21:20:04,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:04,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2020-12-21 21:20:04,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982273987] [2020-12-21 21:20:04,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:20:04,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:04,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:20:04,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:20:04,665 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 18 states. [2020-12-21 21:20:04,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:04,794 INFO L93 Difference]: Finished difference Result 143 states and 178 transitions. [2020-12-21 21:20:04,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:20:04,795 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-12-21 21:20:04,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:04,796 INFO L225 Difference]: With dead ends: 143 [2020-12-21 21:20:04,796 INFO L226 Difference]: Without dead ends: 92 [2020-12-21 21:20:04,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:20:04,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-21 21:20:04,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2020-12-21 21:20:04,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-21 21:20:04,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2020-12-21 21:20:04,801 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 81 [2020-12-21 21:20:04,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:04,801 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2020-12-21 21:20:04,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:20:04,802 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2020-12-21 21:20:04,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 21:20:04,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:04,803 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:05,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:05,018 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:05,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:05,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1015610927, now seen corresponding path program 17 times [2020-12-21 21:20:05,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:05,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760119093] [2020-12-21 21:20:05,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:20:05,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760119093] [2020-12-21 21:20:05,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161544480] [2020-12-21 21:20:05,301 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 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 21:20:05,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-21 21:20:05,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:05,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:20:05,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:05,982 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-21 21:20:05,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:05,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2020-12-21 21:20:05,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673631016] [2020-12-21 21:20:05,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:20:05,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:05,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:20:05,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:20:05,985 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 19 states. [2020-12-21 21:20:06,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:06,151 INFO L93 Difference]: Finished difference Result 151 states and 188 transitions. [2020-12-21 21:20:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:20:06,152 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2020-12-21 21:20:06,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:06,153 INFO L225 Difference]: With dead ends: 151 [2020-12-21 21:20:06,153 INFO L226 Difference]: Without dead ends: 97 [2020-12-21 21:20:06,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:20:06,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-21 21:20:06,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2020-12-21 21:20:06,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-21 21:20:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2020-12-21 21:20:06,158 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 86 [2020-12-21 21:20:06,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:06,158 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2020-12-21 21:20:06,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:20:06,159 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2020-12-21 21:20:06,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-21 21:20:06,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:06,160 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:06,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:06,376 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:06,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:06,377 INFO L82 PathProgramCache]: Analyzing trace with hash -977894605, now seen corresponding path program 18 times [2020-12-21 21:20:06,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:06,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443416378] [2020-12-21 21:20:06,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-21 21:20:06,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443416378] [2020-12-21 21:20:06,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931563581] [2020-12-21 21:20:06,629 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 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 21:20:07,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-12-21 21:20:07,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:07,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:20:07,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-21 21:20:07,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:07,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-21 21:20:07,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243605727] [2020-12-21 21:20:07,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:20:07,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:07,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:20:07,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:07,350 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 21 states. [2020-12-21 21:20:07,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:07,522 INFO L93 Difference]: Finished difference Result 159 states and 198 transitions. [2020-12-21 21:20:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 21:20:07,523 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2020-12-21 21:20:07,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:07,524 INFO L225 Difference]: With dead ends: 159 [2020-12-21 21:20:07,524 INFO L226 Difference]: Without dead ends: 102 [2020-12-21 21:20:07,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:20:07,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-21 21:20:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2020-12-21 21:20:07,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-21 21:20:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2020-12-21 21:20:07,530 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 91 [2020-12-21 21:20:07,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:07,530 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2020-12-21 21:20:07,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:20:07,531 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2020-12-21 21:20:07,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-21 21:20:07,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:07,532 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:07,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:07,746 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:07,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:07,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1826765837, now seen corresponding path program 19 times [2020-12-21 21:20:07,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:07,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556202823] [2020-12-21 21:20:07,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-21 21:20:08,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556202823] [2020-12-21 21:20:08,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646591312] [2020-12-21 21:20:08,032 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 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 21:20:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:08,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 21:20:08,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-21 21:20:08,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:08,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-21 21:20:08,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695013559] [2020-12-21 21:20:08,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 21:20:08,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:08,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 21:20:08,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:20:08,243 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 22 states. [2020-12-21 21:20:08,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:08,440 INFO L93 Difference]: Finished difference Result 167 states and 208 transitions. [2020-12-21 21:20:08,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 21:20:08,446 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 96 [2020-12-21 21:20:08,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:08,447 INFO L225 Difference]: With dead ends: 167 [2020-12-21 21:20:08,447 INFO L226 Difference]: Without dead ends: 107 [2020-12-21 21:20:08,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 96 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 21:20:08,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-21 21:20:08,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2020-12-21 21:20:08,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-21 21:20:08,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2020-12-21 21:20:08,454 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 96 [2020-12-21 21:20:08,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:08,454 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2020-12-21 21:20:08,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 21:20:08,455 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2020-12-21 21:20:08,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 21:20:08,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:08,456 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:08,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:20:08,670 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:08,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:08,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1549876881, now seen corresponding path program 20 times [2020-12-21 21:20:08,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:08,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906188236] [2020-12-21 21:20:08,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-21 21:20:09,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906188236] [2020-12-21 21:20:09,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774362554] [2020-12-21 21:20:09,001 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 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 21:20:09,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:09,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:09,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:20:09,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-21 21:20:09,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:09,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-21 21:20:09,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174786565] [2020-12-21 21:20:09,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:20:09,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:09,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:20:09,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:20:09,228 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand 23 states. [2020-12-21 21:20:09,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:09,452 INFO L93 Difference]: Finished difference Result 175 states and 218 transitions. [2020-12-21 21:20:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:20:09,453 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2020-12-21 21:20:09,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:09,454 INFO L225 Difference]: With dead ends: 175 [2020-12-21 21:20:09,454 INFO L226 Difference]: Without dead ends: 112 [2020-12-21 21:20:09,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 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 21:20:09,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-21 21:20:09,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2020-12-21 21:20:09,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-21 21:20:09,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2020-12-21 21:20:09,460 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 101 [2020-12-21 21:20:09,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:09,460 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2020-12-21 21:20:09,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:20:09,461 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2020-12-21 21:20:09,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-21 21:20:09,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:09,462 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:09,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 21:20:09,670 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:09,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:09,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1041011127, now seen corresponding path program 21 times [2020-12-21 21:20:09,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:09,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270409359] [2020-12-21 21:20:09,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-21 21:20:10,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270409359] [2020-12-21 21:20:10,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220274061] [2020-12-21 21:20:10,022 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 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 21:20:10,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2020-12-21 21:20:10,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:10,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:20:10,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-12-21 21:20:10,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:10,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 23 [2020-12-21 21:20:10,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137409755] [2020-12-21 21:20:10,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:20:10,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:10,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:20:10,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:20:10,739 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand 23 states. [2020-12-21 21:20:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:10,923 INFO L93 Difference]: Finished difference Result 183 states and 228 transitions. [2020-12-21 21:20:10,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:20:10,924 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-12-21 21:20:10,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:10,925 INFO L225 Difference]: With dead ends: 183 [2020-12-21 21:20:10,925 INFO L226 Difference]: Without dead ends: 117 [2020-12-21 21:20:10,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:20:10,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-21 21:20:10,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2020-12-21 21:20:10,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-21 21:20:10,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2020-12-21 21:20:10,932 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 106 [2020-12-21 21:20:10,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:10,932 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2020-12-21 21:20:10,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:20:10,932 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2020-12-21 21:20:10,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-21 21:20:10,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:10,933 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:11,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:11,148 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:11,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:11,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1738221653, now seen corresponding path program 22 times [2020-12-21 21:20:11,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:11,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635971880] [2020-12-21 21:20:11,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-21 21:20:11,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635971880] [2020-12-21 21:20:11,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221263802] [2020-12-21 21:20:11,559 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 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 21:20:11,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:11,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:11,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 21:20:11,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-21 21:20:11,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:11,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-21 21:20:11,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358111010] [2020-12-21 21:20:11,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 21:20:11,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:11,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 21:20:11,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:20:11,822 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand 25 states. [2020-12-21 21:20:12,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:12,040 INFO L93 Difference]: Finished difference Result 191 states and 238 transitions. [2020-12-21 21:20:12,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 21:20:12,041 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 111 [2020-12-21 21:20:12,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:12,042 INFO L225 Difference]: With dead ends: 191 [2020-12-21 21:20:12,042 INFO L226 Difference]: Without dead ends: 122 [2020-12-21 21:20:12,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 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 21:20:12,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-21 21:20:12,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2020-12-21 21:20:12,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-21 21:20:12,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2020-12-21 21:20:12,047 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 111 [2020-12-21 21:20:12,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:12,048 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2020-12-21 21:20:12,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 21:20:12,048 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2020-12-21 21:20:12,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-21 21:20:12,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:12,049 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:12,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 21:20:12,263 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:12,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:12,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1352292485, now seen corresponding path program 23 times [2020-12-21 21:20:12,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:12,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146463585] [2020-12-21 21:20:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-21 21:20:12,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146463585] [2020-12-21 21:20:12,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949374770] [2020-12-21 21:20:12,662 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 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 21:20:13,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-12-21 21:20:13,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:13,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:20:13,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:13,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-21 21:20:13,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:13,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-21 21:20:13,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908696069] [2020-12-21 21:20:13,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:20:13,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:13,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:20:13,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:13,935 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand 26 states. [2020-12-21 21:20:14,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:14,167 INFO L93 Difference]: Finished difference Result 199 states and 248 transitions. [2020-12-21 21:20:14,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 21:20:14,168 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 116 [2020-12-21 21:20:14,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:14,169 INFO L225 Difference]: With dead ends: 199 [2020-12-21 21:20:14,169 INFO L226 Difference]: Without dead ends: 127 [2020-12-21 21:20:14,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 116 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 21:20:14,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-21 21:20:14,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2020-12-21 21:20:14,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-21 21:20:14,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2020-12-21 21:20:14,175 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 116 [2020-12-21 21:20:14,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:14,175 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2020-12-21 21:20:14,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:20:14,175 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2020-12-21 21:20:14,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-21 21:20:14,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:14,176 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:14,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:14,392 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:14,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:14,392 INFO L82 PathProgramCache]: Analyzing trace with hash 947422695, now seen corresponding path program 24 times [2020-12-21 21:20:14,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:14,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021547664] [2020-12-21 21:20:14,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-21 21:20:14,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021547664] [2020-12-21 21:20:14,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600134913] [2020-12-21 21:20:14,833 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 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 21:20:15,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-12-21 21:20:15,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:15,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 21:20:15,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-21 21:20:15,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:15,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-21 21:20:15,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870301799] [2020-12-21 21:20:15,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 21:20:15,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:15,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 21:20:15,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:20:15,988 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand 27 states. [2020-12-21 21:20:16,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:16,215 INFO L93 Difference]: Finished difference Result 207 states and 258 transitions. [2020-12-21 21:20:16,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:20:16,216 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-12-21 21:20:16,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:16,221 INFO L225 Difference]: With dead ends: 207 [2020-12-21 21:20:16,221 INFO L226 Difference]: Without dead ends: 132 [2020-12-21 21:20:16,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 121 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 21:20:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-21 21:20:16,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2020-12-21 21:20:16,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-21 21:20:16,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2020-12-21 21:20:16,227 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 121 [2020-12-21 21:20:16,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:16,227 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2020-12-21 21:20:16,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 21:20:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2020-12-21 21:20:16,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-21 21:20:16,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:16,228 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:16,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 21:20:16,442 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:16,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:16,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1657191105, now seen corresponding path program 25 times [2020-12-21 21:20:16,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:16,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5171580] [2020-12-21 21:20:16,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-12-21 21:20:16,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5171580] [2020-12-21 21:20:16,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254342296] [2020-12-21 21:20:16,881 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 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 21:20:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:17,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 21:20:17,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-12-21 21:20:17,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:17,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-21 21:20:17,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635827167] [2020-12-21 21:20:17,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 21:20:17,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:17,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 21:20:17,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:20:17,121 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand 28 states. [2020-12-21 21:20:17,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:17,404 INFO L93 Difference]: Finished difference Result 215 states and 268 transitions. [2020-12-21 21:20:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 21:20:17,405 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 126 [2020-12-21 21:20:17,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:17,405 INFO L225 Difference]: With dead ends: 215 [2020-12-21 21:20:17,405 INFO L226 Difference]: Without dead ends: 137 [2020-12-21 21:20:17,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:20:17,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-21 21:20:17,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2020-12-21 21:20:17,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-21 21:20:17,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2020-12-21 21:20:17,411 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 126 [2020-12-21 21:20:17,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:17,411 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2020-12-21 21:20:17,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 21:20:17,411 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2020-12-21 21:20:17,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-21 21:20:17,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:17,412 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:17,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 21:20:17,626 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:17,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:17,626 INFO L82 PathProgramCache]: Analyzing trace with hash 843680803, now seen corresponding path program 26 times [2020-12-21 21:20:17,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:17,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636544754] [2020-12-21 21:20:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1477 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-12-21 21:20:18,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636544754] [2020-12-21 21:20:18,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617581080] [2020-12-21 21:20:18,137 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 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 21:20:18,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:18,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:18,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 21:20:18,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1477 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-12-21 21:20:18,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:18,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-21 21:20:18,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642098473] [2020-12-21 21:20:18,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:20:18,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:18,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:20:18,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:18,388 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand 29 states. [2020-12-21 21:20:18,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:18,631 INFO L93 Difference]: Finished difference Result 223 states and 278 transitions. [2020-12-21 21:20:18,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 21:20:18,631 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 131 [2020-12-21 21:20:18,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:18,632 INFO L225 Difference]: With dead ends: 223 [2020-12-21 21:20:18,632 INFO L226 Difference]: Without dead ends: 142 [2020-12-21 21:20:18,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:18,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-21 21:20:18,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2020-12-21 21:20:18,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-21 21:20:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2020-12-21 21:20:18,638 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 131 [2020-12-21 21:20:18,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:18,639 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2020-12-21 21:20:18,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:20:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2020-12-21 21:20:18,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-21 21:20:18,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:18,640 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:18,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:20:18,854 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:18,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:18,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1167567619, now seen corresponding path program 27 times [2020-12-21 21:20:18,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:18,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289438132] [2020-12-21 21:20:18,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-12-21 21:20:19,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289438132] [2020-12-21 21:20:19,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735352046] [2020-12-21 21:20:19,385 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 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 21:20:20,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2020-12-21 21:20:20,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:20,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 21:20:20,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-12-21 21:20:20,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:20,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 29 [2020-12-21 21:20:20,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141610564] [2020-12-21 21:20:20,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:20:20,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:20,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:20:20,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:20,646 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand 29 states. [2020-12-21 21:20:20,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:20,908 INFO L93 Difference]: Finished difference Result 231 states and 288 transitions. [2020-12-21 21:20:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 21:20:20,908 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 136 [2020-12-21 21:20:20,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:20,910 INFO L225 Difference]: With dead ends: 231 [2020-12-21 21:20:20,910 INFO L226 Difference]: Without dead ends: 147 [2020-12-21 21:20:20,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:20,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-21 21:20:20,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2020-12-21 21:20:20,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-21 21:20:20,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 172 transitions. [2020-12-21 21:20:20,916 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 172 transitions. Word has length 136 [2020-12-21 21:20:20,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:20,916 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 172 transitions. [2020-12-21 21:20:20,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:20:20,916 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 172 transitions. [2020-12-21 21:20:20,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-21 21:20:20,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:20,917 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:21,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:21,127 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:21,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:21,128 INFO L82 PathProgramCache]: Analyzing trace with hash 172468831, now seen corresponding path program 28 times [2020-12-21 21:20:21,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:21,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496972796] [2020-12-21 21:20:21,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1730 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2020-12-21 21:20:21,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496972796] [2020-12-21 21:20:21,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150769547] [2020-12-21 21:20:21,739 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:21,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:21,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:21,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-21 21:20:21,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1730 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-12-21 21:20:22,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:22,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 30 [2020-12-21 21:20:22,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481735054] [2020-12-21 21:20:22,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:20:22,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:22,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:20:22,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:20:22,038 INFO L87 Difference]: Start difference. First operand 144 states and 172 transitions. Second operand 30 states. [2020-12-21 21:20:22,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:22,319 INFO L93 Difference]: Finished difference Result 239 states and 298 transitions. [2020-12-21 21:20:22,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 21:20:22,319 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 141 [2020-12-21 21:20:22,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:22,320 INFO L225 Difference]: With dead ends: 239 [2020-12-21 21:20:22,321 INFO L226 Difference]: Without dead ends: 152 [2020-12-21 21:20:22,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:20:22,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-21 21:20:22,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2020-12-21 21:20:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-21 21:20:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2020-12-21 21:20:22,326 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 141 [2020-12-21 21:20:22,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:22,326 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2020-12-21 21:20:22,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:20:22,327 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2020-12-21 21:20:22,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-21 21:20:22,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:22,328 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:22,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-21 21:20:22,543 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:22,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:22,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1299113785, now seen corresponding path program 29 times [2020-12-21 21:20:22,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:22,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511116084] [2020-12-21 21:20:22,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:23,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-12-21 21:20:23,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511116084] [2020-12-21 21:20:23,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865495021] [2020-12-21 21:20:23,141 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:28,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2020-12-21 21:20:28,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:28,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 21:20:28,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-12-21 21:20:28,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:28,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-21 21:20:28,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860675613] [2020-12-21 21:20:28,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 21:20:28,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:28,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 21:20:28,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:20:28,579 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand 32 states. [2020-12-21 21:20:28,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:28,868 INFO L93 Difference]: Finished difference Result 247 states and 308 transitions. [2020-12-21 21:20:28,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 21:20:28,868 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 146 [2020-12-21 21:20:28,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:28,870 INFO L225 Difference]: With dead ends: 247 [2020-12-21 21:20:28,870 INFO L226 Difference]: Without dead ends: 157 [2020-12-21 21:20:28,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 146 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 21:20:28,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-21 21:20:28,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2020-12-21 21:20:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-21 21:20:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 184 transitions. [2020-12-21 21:20:28,877 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 184 transitions. Word has length 146 [2020-12-21 21:20:28,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:28,877 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 184 transitions. [2020-12-21 21:20:28,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 21:20:28,877 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 184 transitions. [2020-12-21 21:20:28,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-21 21:20:28,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:28,878 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:29,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:29,092 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:29,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:29,093 INFO L82 PathProgramCache]: Analyzing trace with hash -689790821, now seen corresponding path program 30 times [2020-12-21 21:20:29,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:29,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586817902] [2020-12-21 21:20:29,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2020-12-21 21:20:29,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586817902] [2020-12-21 21:20:29,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174582651] [2020-12-21 21:20:29,755 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:35,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2020-12-21 21:20:35,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:35,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 21:20:35,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-12-21 21:20:35,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:35,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 32 [2020-12-21 21:20:35,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864368142] [2020-12-21 21:20:35,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 21:20:35,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:35,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 21:20:35,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:20:35,210 INFO L87 Difference]: Start difference. First operand 154 states and 184 transitions. Second operand 32 states. [2020-12-21 21:20:35,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:35,472 INFO L93 Difference]: Finished difference Result 255 states and 318 transitions. [2020-12-21 21:20:35,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 21:20:35,473 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 151 [2020-12-21 21:20:35,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:35,474 INFO L225 Difference]: With dead ends: 255 [2020-12-21 21:20:35,474 INFO L226 Difference]: Without dead ends: 162 [2020-12-21 21:20:35,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:20:35,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-21 21:20:35,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2020-12-21 21:20:35,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-21 21:20:35,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 190 transitions. [2020-12-21 21:20:35,482 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 190 transitions. Word has length 151 [2020-12-21 21:20:35,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:35,483 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 190 transitions. [2020-12-21 21:20:35,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 21:20:35,483 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 190 transitions. [2020-12-21 21:20:35,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-21 21:20:35,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:35,484 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:35,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-21 21:20:35,688 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:35,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:35,688 INFO L82 PathProgramCache]: Analyzing trace with hash -30028149, now seen corresponding path program 31 times [2020-12-21 21:20:35,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:35,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549121665] [2020-12-21 21:20:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-12-21 21:20:36,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549121665] [2020-12-21 21:20:36,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125970517] [2020-12-21 21:20:36,448 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:36,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-21 21:20:36,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-12-21 21:20:36,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:36,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-21 21:20:36,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620199788] [2020-12-21 21:20:36,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-21 21:20:36,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:36,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-21 21:20:36,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:20:36,796 INFO L87 Difference]: Start difference. First operand 159 states and 190 transitions. Second operand 34 states. [2020-12-21 21:20:37,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:37,122 INFO L93 Difference]: Finished difference Result 263 states and 328 transitions. [2020-12-21 21:20:37,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-21 21:20:37,123 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 156 [2020-12-21 21:20:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:37,124 INFO L225 Difference]: With dead ends: 263 [2020-12-21 21:20:37,124 INFO L226 Difference]: Without dead ends: 167 [2020-12-21 21:20:37,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:20:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-21 21:20:37,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2020-12-21 21:20:37,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-21 21:20:37,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 196 transitions. [2020-12-21 21:20:37,130 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 196 transitions. Word has length 156 [2020-12-21 21:20:37,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:37,130 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 196 transitions. [2020-12-21 21:20:37,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-21 21:20:37,130 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 196 transitions. [2020-12-21 21:20:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-21 21:20:37,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:37,131 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:37,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-21 21:20:37,345 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:37,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:37,346 INFO L82 PathProgramCache]: Analyzing trace with hash -58052905, now seen corresponding path program 32 times [2020-12-21 21:20:37,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:37,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698990695] [2020-12-21 21:20:37,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2020-12-21 21:20:38,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698990695] [2020-12-21 21:20:38,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754619690] [2020-12-21 21:20:38,132 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:38,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:38,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:38,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-21 21:20:38,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2020-12-21 21:20:38,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:38,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-21 21:20:38,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342972369] [2020-12-21 21:20:38,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-21 21:20:38,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:38,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-21 21:20:38,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:20:38,412 INFO L87 Difference]: Start difference. First operand 164 states and 196 transitions. Second operand 35 states. [2020-12-21 21:20:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:38,722 INFO L93 Difference]: Finished difference Result 271 states and 338 transitions. [2020-12-21 21:20:38,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 21:20:38,723 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 161 [2020-12-21 21:20:38,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:38,725 INFO L225 Difference]: With dead ends: 271 [2020-12-21 21:20:38,725 INFO L226 Difference]: Without dead ends: 172 [2020-12-21 21:20:38,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:20:38,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-21 21:20:38,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2020-12-21 21:20:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-21 21:20:38,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2020-12-21 21:20:38,732 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 161 [2020-12-21 21:20:38,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:38,732 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2020-12-21 21:20:38,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-21 21:20:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2020-12-21 21:20:38,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-21 21:20:38,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:38,733 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:38,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-21 21:20:38,945 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:38,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:38,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1768551345, now seen corresponding path program 33 times [2020-12-21 21:20:38,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:38,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291949017] [2020-12-21 21:20:38,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:39,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2020-12-21 21:20:39,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291949017] [2020-12-21 21:20:39,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630332756] [2020-12-21 21:20:39,737 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:45,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2020-12-21 21:20:45,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:45,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-21 21:20:45,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-12-21 21:20:46,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:46,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 35 [2020-12-21 21:20:46,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055348421] [2020-12-21 21:20:46,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-21 21:20:46,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:46,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-21 21:20:46,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:20:46,007 INFO L87 Difference]: Start difference. First operand 169 states and 202 transitions. Second operand 35 states. [2020-12-21 21:20:46,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:46,316 INFO L93 Difference]: Finished difference Result 279 states and 348 transitions. [2020-12-21 21:20:46,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-21 21:20:46,317 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 166 [2020-12-21 21:20:46,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:46,318 INFO L225 Difference]: With dead ends: 279 [2020-12-21 21:20:46,318 INFO L226 Difference]: Without dead ends: 177 [2020-12-21 21:20:46,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:20:46,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-21 21:20:46,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2020-12-21 21:20:46,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-21 21:20:46,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 208 transitions. [2020-12-21 21:20:46,323 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 208 transitions. Word has length 166 [2020-12-21 21:20:46,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:46,324 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 208 transitions. [2020-12-21 21:20:46,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-21 21:20:46,324 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 208 transitions. [2020-12-21 21:20:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-21 21:20:46,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:46,325 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:46,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-21 21:20:46,539 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:46,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:46,539 INFO L82 PathProgramCache]: Analyzing trace with hash -374467309, now seen corresponding path program 34 times [2020-12-21 21:20:46,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:46,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579096200] [2020-12-21 21:20:46,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2609 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-12-21 21:20:47,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579096200] [2020-12-21 21:20:47,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061489989] [2020-12-21 21:20:47,356 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:47,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:47,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:47,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-21 21:20:47,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:47,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2609 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-12-21 21:20:47,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:47,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-21 21:20:47,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730154062] [2020-12-21 21:20:47,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 21:20:47,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:47,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 21:20:47,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:20:47,670 INFO L87 Difference]: Start difference. First operand 174 states and 208 transitions. Second operand 37 states. [2020-12-21 21:20:48,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:48,103 INFO L93 Difference]: Finished difference Result 287 states and 358 transitions. [2020-12-21 21:20:48,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-21 21:20:48,104 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 171 [2020-12-21 21:20:48,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:48,105 INFO L225 Difference]: With dead ends: 287 [2020-12-21 21:20:48,105 INFO L226 Difference]: Without dead ends: 182 [2020-12-21 21:20:48,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:20:48,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-21 21:20:48,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 179. [2020-12-21 21:20:48,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-21 21:20:48,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 214 transitions. [2020-12-21 21:20:48,112 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 214 transitions. Word has length 171 [2020-12-21 21:20:48,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:48,112 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 214 transitions. [2020-12-21 21:20:48,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 21:20:48,112 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 214 transitions. [2020-12-21 21:20:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-21 21:20:48,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:48,114 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:48,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 21:20:48,328 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:48,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:48,329 INFO L82 PathProgramCache]: Analyzing trace with hash -2117987821, now seen corresponding path program 35 times [2020-12-21 21:20:48,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:48,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457914909] [2020-12-21 21:20:48,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2773 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-12-21 21:20:49,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457914909] [2020-12-21 21:20:49,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524102605] [2020-12-21 21:20:49,274 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:04,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2020-12-21 21:21:04,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:04,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 21:21:04,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2773 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-12-21 21:21:05,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:05,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-21 21:21:05,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439298834] [2020-12-21 21:21:05,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 21:21:05,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:05,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 21:21:05,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:21:05,069 INFO L87 Difference]: Start difference. First operand 179 states and 214 transitions. Second operand 38 states. [2020-12-21 21:21:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:05,418 INFO L93 Difference]: Finished difference Result 295 states and 368 transitions. [2020-12-21 21:21:05,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 21:21:05,419 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 176 [2020-12-21 21:21:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:05,420 INFO L225 Difference]: With dead ends: 295 [2020-12-21 21:21:05,421 INFO L226 Difference]: Without dead ends: 187 [2020-12-21 21:21:05,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:21:05,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-21 21:21:05,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2020-12-21 21:21:05,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-21 21:21:05,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 220 transitions. [2020-12-21 21:21:05,427 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 220 transitions. Word has length 176 [2020-12-21 21:21:05,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:05,427 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 220 transitions. [2020-12-21 21:21:05,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 21:21:05,428 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 220 transitions. [2020-12-21 21:21:05,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-21 21:21:05,429 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:05,429 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:05,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 21:21:05,644 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:05,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:05,644 INFO L82 PathProgramCache]: Analyzing trace with hash -759295153, now seen corresponding path program 36 times [2020-12-21 21:21:05,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:05,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327432389] [2020-12-21 21:21:05,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2942 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-12-21 21:21:06,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327432389] [2020-12-21 21:21:06,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653959453] [2020-12-21 21:21:06,537 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:16,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2020-12-21 21:21:16,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:17,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-21 21:21:17,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2942 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-12-21 21:21:17,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:17,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-21 21:21:17,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899989695] [2020-12-21 21:21:17,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-21 21:21:17,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:17,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-21 21:21:17,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:21:17,183 INFO L87 Difference]: Start difference. First operand 184 states and 220 transitions. Second operand 39 states. [2020-12-21 21:21:17,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:17,574 INFO L93 Difference]: Finished difference Result 303 states and 378 transitions. [2020-12-21 21:21:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-21 21:21:17,575 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 181 [2020-12-21 21:21:17,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:17,576 INFO L225 Difference]: With dead ends: 303 [2020-12-21 21:21:17,576 INFO L226 Difference]: Without dead ends: 192 [2020-12-21 21:21:17,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:21:17,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-21 21:21:17,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2020-12-21 21:21:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-21 21:21:17,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 226 transitions. [2020-12-21 21:21:17,582 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 226 transitions. Word has length 181 [2020-12-21 21:21:17,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:17,583 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 226 transitions. [2020-12-21 21:21:17,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-21 21:21:17,583 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 226 transitions. [2020-12-21 21:21:17,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-21 21:21:17,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:17,584 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:17,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 21:21:17,795 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:17,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:17,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1580589097, now seen corresponding path program 37 times [2020-12-21 21:21:17,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:17,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708270500] [2020-12-21 21:21:17,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-12-21 21:21:18,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708270500] [2020-12-21 21:21:18,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742773595] [2020-12-21 21:21:18,727 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:18,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-21 21:21:18,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-12-21 21:21:19,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:19,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-21 21:21:19,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588348626] [2020-12-21 21:21:19,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-21 21:21:19,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:19,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-21 21:21:19,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:21:19,065 INFO L87 Difference]: Start difference. First operand 189 states and 226 transitions. Second operand 40 states. [2020-12-21 21:21:19,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:19,508 INFO L93 Difference]: Finished difference Result 311 states and 388 transitions. [2020-12-21 21:21:19,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-21 21:21:19,509 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 186 [2020-12-21 21:21:19,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:19,510 INFO L225 Difference]: With dead ends: 311 [2020-12-21 21:21:19,510 INFO L226 Difference]: Without dead ends: 197 [2020-12-21 21:21:19,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:21:19,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-21 21:21:19,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2020-12-21 21:21:19,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-21 21:21:19,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 232 transitions. [2020-12-21 21:21:19,516 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 232 transitions. Word has length 186 [2020-12-21 21:21:19,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:19,517 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 232 transitions. [2020-12-21 21:21:19,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-21 21:21:19,517 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 232 transitions. [2020-12-21 21:21:19,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-21 21:21:19,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:19,518 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:19,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 21:21:19,733 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:19,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:19,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1848240523, now seen corresponding path program 38 times [2020-12-21 21:21:19,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:19,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739448665] [2020-12-21 21:21:19,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3295 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2020-12-21 21:21:20,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739448665] [2020-12-21 21:21:20,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765231643] [2020-12-21 21:21:20,738 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:20,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:21:20,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:20,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 21:21:20,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3295 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2020-12-21 21:21:21,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:21,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-21 21:21:21,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593049723] [2020-12-21 21:21:21,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-21 21:21:21,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:21,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-21 21:21:21,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:21:21,109 INFO L87 Difference]: Start difference. First operand 194 states and 232 transitions. Second operand 41 states. [2020-12-21 21:21:21,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:21,539 INFO L93 Difference]: Finished difference Result 319 states and 398 transitions. [2020-12-21 21:21:21,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-21 21:21:21,540 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 191 [2020-12-21 21:21:21,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:21,542 INFO L225 Difference]: With dead ends: 319 [2020-12-21 21:21:21,542 INFO L226 Difference]: Without dead ends: 202 [2020-12-21 21:21:21,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:21:21,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-21 21:21:21,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2020-12-21 21:21:21,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-21 21:21:21,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 238 transitions. [2020-12-21 21:21:21,549 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 238 transitions. Word has length 191 [2020-12-21 21:21:21,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:21,549 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 238 transitions. [2020-12-21 21:21:21,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-21 21:21:21,550 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 238 transitions. [2020-12-21 21:21:21,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-21 21:21:21,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:21,551 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:21,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:21,759 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:21,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:21,760 INFO L82 PathProgramCache]: Analyzing trace with hash -121735781, now seen corresponding path program 39 times [2020-12-21 21:21:21,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:21,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119998163] [2020-12-21 21:21:21,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3479 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2020-12-21 21:21:22,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119998163] [2020-12-21 21:21:22,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404589213] [2020-12-21 21:21:22,874 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:41,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2020-12-21 21:21:41,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:41,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 139 conjunts are in the unsatisfiable core [2020-12-21 21:21:41,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:41,231 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-12-21 21:21:41,235 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 21:21:41,242 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 21:21:41,244 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 21:21:41,244 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:7 [2020-12-21 21:22:06,194 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-21 21:23:42,357 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-12-21 21:23:42,359 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2020-12-21 21:23:42,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:23:42,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-12-21 21:23:42,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079092001] [2020-12-21 21:23:42,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-21 21:23:42,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:42,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-21 21:23:42,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1416, Invalid=3270, Unknown=6, NotChecked=0, Total=4692 [2020-12-21 21:23:42,363 INFO L87 Difference]: Start difference. First operand 199 states and 238 transitions. Second operand 41 states. [2020-12-21 21:23:42,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:23:42,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:23:42,573 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@5c55c35e at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:743) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:674) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:473) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:62) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:131) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-21 21:23:42,577 INFO L168 Benchmark]: Toolchain (without parser) took 230262.10 ms. Allocated memory was 155.2 MB in the beginning and 324.0 MB in the end (delta: 168.8 MB). Free memory was 129.9 MB in the beginning and 263.2 MB in the end (delta: -133.3 MB). Peak memory consumption was 36.7 MB. Max. memory is 8.0 GB. [2020-12-21 21:23:42,578 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 155.2 MB. Free memory is still 139.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-21 21:23:42,578 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.58 ms. Allocated memory is still 155.2 MB. Free memory was 129.6 MB in the beginning and 119.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-21 21:23:42,579 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.68 ms. Allocated memory is still 155.2 MB. Free memory was 119.5 MB in the beginning and 118.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-21 21:23:42,579 INFO L168 Benchmark]: Boogie Preprocessor took 29.67 ms. Allocated memory is still 155.2 MB. Free memory was 118.1 MB in the beginning and 116.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-21 21:23:42,579 INFO L168 Benchmark]: RCFGBuilder took 525.82 ms. Allocated memory is still 155.2 MB. Free memory was 116.9 MB in the beginning and 130.8 MB in the end (delta: -13.9 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. [2020-12-21 21:23:42,580 INFO L168 Benchmark]: TraceAbstraction took 229379.64 ms. Allocated memory was 155.2 MB in the beginning and 324.0 MB in the end (delta: 168.8 MB). Free memory was 130.3 MB in the beginning and 263.2 MB in the end (delta: -132.9 MB). Peak memory consumption was 35.9 MB. Max. memory is 8.0 GB. [2020-12-21 21:23:42,582 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 155.2 MB. Free memory is still 139.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 266.58 ms. Allocated memory is still 155.2 MB. Free memory was 129.6 MB in the beginning and 119.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 44.68 ms. Allocated memory is still 155.2 MB. Free memory was 119.5 MB in the beginning and 118.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.67 ms. Allocated memory is still 155.2 MB. Free memory was 118.1 MB in the beginning and 116.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 525.82 ms. Allocated memory is still 155.2 MB. Free memory was 116.9 MB in the beginning and 130.8 MB in the end (delta: -13.9 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 229379.64 ms. Allocated memory was 155.2 MB in the beginning and 324.0 MB in the end (delta: 168.8 MB). Free memory was 130.3 MB in the beginning and 263.2 MB in the end (delta: -132.9 MB). Peak memory consumption was 35.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@5c55c35e de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@5c55c35e: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...