/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_partition_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:38:49,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:38:49,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:38:49,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 21:38:49,525 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:38:49,568 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:38:49,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:38:49,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:38:49,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:38:49,570 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:38:49,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:38:49,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:38:49,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:38:49,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:38:49,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:38:49,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:38:49,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:38:49,572 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:38:49,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:38:49,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:38:49,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:38:49,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:38:49,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:38:49,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:38:49,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:38:49,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:38:49,574 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:38:49,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:38:49,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:38:49,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:38:49,575 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:38:49,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:38:49,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:38:49,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:38:49,992 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:38:49,993 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:38:49,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2020-12-21 21:38:50,081 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0f1c3a8c/43df1d6c7bd34890846ff504cd5b0f30/FLAG219260427 [2020-12-21 21:38:50,835 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:38:50,835 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2020-12-21 21:38:50,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0f1c3a8c/43df1d6c7bd34890846ff504cd5b0f30/FLAG219260427 [2020-12-21 21:38:51,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0f1c3a8c/43df1d6c7bd34890846ff504cd5b0f30 [2020-12-21 21:38:51,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:38:51,204 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:38:51,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:38:51,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:38:51,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:38:51,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:38:51" (1/1) ... [2020-12-21 21:38:51,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d64498a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:51, skipping insertion in model container [2020-12-21 21:38:51,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:38:51" (1/1) ... [2020-12-21 21:38:51,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:38:51,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:38:51,422 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-2.i[820,833] [2020-12-21 21:38:51,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:38:51,454 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:38:51,470 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-2.i[820,833] [2020-12-21 21:38:51,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:38:51,499 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:38:51,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:51 WrapperNode [2020-12-21 21:38:51,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:38:51,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:38:51,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:38:51,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:38:51,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:51" (1/1) ... [2020-12-21 21:38:51,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:51" (1/1) ... [2020-12-21 21:38:51,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:38:51,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:38:51,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:38:51,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:38:51,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:51" (1/1) ... [2020-12-21 21:38:51,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:51" (1/1) ... [2020-12-21 21:38:51,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:51" (1/1) ... [2020-12-21 21:38:51,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:51" (1/1) ... [2020-12-21 21:38:51,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:51" (1/1) ... [2020-12-21 21:38:51,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:51" (1/1) ... [2020-12-21 21:38:51,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:51" (1/1) ... [2020-12-21 21:38:51,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:38:51,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:38:51,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:38:51,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:38:51,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:38:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:38:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:38:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:38:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:38:51,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:38:51,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:38:51,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:38:51,973 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:38:51,973 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-21 21:38:51,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:38:51 BoogieIcfgContainer [2020-12-21 21:38:51,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:38:51,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:38:51,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:38:51,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:38:51,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:38:51" (1/3) ... [2020-12-21 21:38:51,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ae1ebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:38:51, skipping insertion in model container [2020-12-21 21:38:51,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:38:51" (2/3) ... [2020-12-21 21:38:51,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ae1ebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:38:51, skipping insertion in model container [2020-12-21 21:38:51,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:38:51" (3/3) ... [2020-12-21 21:38:51,985 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2020-12-21 21:38:51,993 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:38:51,999 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:38:52,023 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:38:52,121 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:38:52,126 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:38:52,126 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:38:52,126 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:38:52,126 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:38:52,126 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:38:52,126 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:38:52,127 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:38:52,145 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-21 21:38:52,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 21:38:52,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:52,162 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:52,163 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:52,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:52,193 INFO L82 PathProgramCache]: Analyzing trace with hash -700880873, now seen corresponding path program 1 times [2020-12-21 21:38:52,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:52,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417095834] [2020-12-21 21:38:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:38:52,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417095834] [2020-12-21 21:38:52,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:38:52,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:38:52,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389676823] [2020-12-21 21:38:52,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:38:52,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:52,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:38:52,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:38:52,537 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-12-21 21:38:52,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:52,558 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2020-12-21 21:38:52,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:38:52,560 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-21 21:38:52,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:52,571 INFO L225 Difference]: With dead ends: 40 [2020-12-21 21:38:52,572 INFO L226 Difference]: Without dead ends: 18 [2020-12-21 21:38:52,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:38:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-21 21:38:52,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-21 21:38:52,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 21:38:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2020-12-21 21:38:52,618 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2020-12-21 21:38:52,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:52,618 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2020-12-21 21:38:52,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:38:52,619 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2020-12-21 21:38:52,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 21:38:52,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:52,620 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:52,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:38:52,620 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:52,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:52,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1883645503, now seen corresponding path program 1 times [2020-12-21 21:38:52,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:52,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860580318] [2020-12-21 21:38:52,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:38:52,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860580318] [2020-12-21 21:38:52,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:38:52,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:38:52,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950103703] [2020-12-21 21:38:52,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:38:52,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:52,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:38:52,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:38:52,685 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand 3 states. [2020-12-21 21:38:52,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:52,705 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2020-12-21 21:38:52,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:38:52,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-21 21:38:52,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:52,707 INFO L225 Difference]: With dead ends: 34 [2020-12-21 21:38:52,707 INFO L226 Difference]: Without dead ends: 20 [2020-12-21 21:38:52,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:38:52,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-21 21:38:52,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-21 21:38:52,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 21:38:52,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-12-21 21:38:52,714 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2020-12-21 21:38:52,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:52,714 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-12-21 21:38:52,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:38:52,715 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-12-21 21:38:52,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 21:38:52,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:52,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:52,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:38:52,716 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:52,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:52,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1756124227, now seen corresponding path program 1 times [2020-12-21 21:38:52,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:52,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801365151] [2020-12-21 21:38:52,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:38:52,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801365151] [2020-12-21 21:38:52,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:38:52,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:38:52,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699252467] [2020-12-21 21:38:52,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:38:52,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:52,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:38:52,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:38:52,819 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 3 states. [2020-12-21 21:38:52,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:52,887 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2020-12-21 21:38:52,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:38:52,890 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-21 21:38:52,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:52,891 INFO L225 Difference]: With dead ends: 36 [2020-12-21 21:38:52,891 INFO L226 Difference]: Without dead ends: 25 [2020-12-21 21:38:52,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:38:52,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-21 21:38:52,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2020-12-21 21:38:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-21 21:38:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-12-21 21:38:52,898 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2020-12-21 21:38:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:52,898 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-12-21 21:38:52,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:38:52,898 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-12-21 21:38:52,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-21 21:38:52,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:52,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:52,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 21:38:52,900 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:52,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:52,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1655857333, now seen corresponding path program 1 times [2020-12-21 21:38:52,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:52,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652914796] [2020-12-21 21:38:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:38:52,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652914796] [2020-12-21 21:38:52,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442820888] [2020-12-21 21:38:52,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:53,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:38:53,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:53,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:38:53,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:53,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:38:53,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497143977] [2020-12-21 21:38:53,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:38:53,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:53,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:38:53,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:38:53,094 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 5 states. [2020-12-21 21:38:53,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:53,117 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2020-12-21 21:38:53,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:38:53,118 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-21 21:38:53,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:53,119 INFO L225 Difference]: With dead ends: 40 [2020-12-21 21:38:53,119 INFO L226 Difference]: Without dead ends: 24 [2020-12-21 21:38:53,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:38:53,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-21 21:38:53,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-21 21:38:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 21:38:53,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-21 21:38:53,125 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 18 [2020-12-21 21:38:53,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:53,125 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-21 21:38:53,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:38:53,126 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-21 21:38:53,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 21:38:53,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:53,127 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:53,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:53,342 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:53,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:53,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1273395149, now seen corresponding path program 2 times [2020-12-21 21:38:53,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:53,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498452417] [2020-12-21 21:38:53,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:38:53,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498452417] [2020-12-21 21:38:53,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062370886] [2020-12-21 21:38:53,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:53,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:38:53,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:53,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:38:53,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 21:38:53,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:53,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-21 21:38:53,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27437201] [2020-12-21 21:38:53,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:38:53,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:53,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:38:53,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:38:53,521 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 7 states. [2020-12-21 21:38:53,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:53,639 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2020-12-21 21:38:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:38:53,639 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-21 21:38:53,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:53,640 INFO L225 Difference]: With dead ends: 52 [2020-12-21 21:38:53,641 INFO L226 Difference]: Without dead ends: 36 [2020-12-21 21:38:53,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:38:53,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-21 21:38:53,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-12-21 21:38:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 21:38:53,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-12-21 21:38:53,647 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2020-12-21 21:38:53,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:53,648 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-12-21 21:38:53,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:38:53,648 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-12-21 21:38:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 21:38:53,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:53,649 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:53,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:53,865 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:53,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:53,867 INFO L82 PathProgramCache]: Analyzing trace with hash 461496583, now seen corresponding path program 3 times [2020-12-21 21:38:53,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:53,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876138343] [2020-12-21 21:38:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-21 21:38:54,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876138343] [2020-12-21 21:38:54,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103748420] [2020-12-21 21:38:54,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:54,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:38:54,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:54,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:38:54,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 21:38:54,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:54,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-21 21:38:54,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919093302] [2020-12-21 21:38:54,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:38:54,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:54,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:38:54,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:38:54,160 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 9 states. [2020-12-21 21:38:54,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:54,282 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2020-12-21 21:38:54,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:38:54,282 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-21 21:38:54,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:54,283 INFO L225 Difference]: With dead ends: 66 [2020-12-21 21:38:54,283 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 21:38:54,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:38:54,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 21:38:54,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-12-21 21:38:54,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 21:38:54,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-12-21 21:38:54,291 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 28 [2020-12-21 21:38:54,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:54,291 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-12-21 21:38:54,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:38:54,292 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-12-21 21:38:54,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 21:38:54,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:54,293 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:54,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:54,509 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:54,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:54,510 INFO L82 PathProgramCache]: Analyzing trace with hash 997298065, now seen corresponding path program 4 times [2020-12-21 21:38:54,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:54,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72864410] [2020-12-21 21:38:54,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:54,606 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:38:54,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72864410] [2020-12-21 21:38:54,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944290984] [2020-12-21 21:38:54,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:54,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:38:54,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:54,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:38:54,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:38:54,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:54,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:38:54,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393762821] [2020-12-21 21:38:54,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:38:54,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:54,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:38:54,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:38:54,733 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 8 states. [2020-12-21 21:38:54,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:54,763 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2020-12-21 21:38:54,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:38:54,764 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-12-21 21:38:54,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:54,765 INFO L225 Difference]: With dead ends: 70 [2020-12-21 21:38:54,765 INFO L226 Difference]: Without dead ends: 42 [2020-12-21 21:38:54,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:38:54,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-21 21:38:54,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-21 21:38:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-21 21:38:54,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-12-21 21:38:54,773 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 36 [2020-12-21 21:38:54,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:54,773 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-12-21 21:38:54,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:38:54,791 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-12-21 21:38:54,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-21 21:38:54,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:54,793 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:54,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:54,994 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:54,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:54,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1492513901, now seen corresponding path program 5 times [2020-12-21 21:38:54,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:54,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939850382] [2020-12-21 21:38:54,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:38:55,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939850382] [2020-12-21 21:38:55,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613289361] [2020-12-21 21:38:55,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:55,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 21:38:55,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:55,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:38:55,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:38:55,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:55,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-21 21:38:55,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763937555] [2020-12-21 21:38:55,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:38:55,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:55,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:38:55,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:38:55,323 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 12 states. [2020-12-21 21:38:55,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:55,488 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2020-12-21 21:38:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:38:55,489 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-12-21 21:38:55,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:55,490 INFO L225 Difference]: With dead ends: 82 [2020-12-21 21:38:55,490 INFO L226 Difference]: Without dead ends: 54 [2020-12-21 21:38:55,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:38:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-21 21:38:55,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-12-21 21:38:55,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-21 21:38:55,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2020-12-21 21:38:55,514 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 38 [2020-12-21 21:38:55,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:55,514 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2020-12-21 21:38:55,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:38:55,514 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2020-12-21 21:38:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 21:38:55,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:55,520 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:55,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:55,736 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:55,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:55,737 INFO L82 PathProgramCache]: Analyzing trace with hash -2093123123, now seen corresponding path program 6 times [2020-12-21 21:38:55,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:55,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579556989] [2020-12-21 21:38:55,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-21 21:38:55,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579556989] [2020-12-21 21:38:55,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710624771] [2020-12-21 21:38:55,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:55,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:38:55,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:55,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:38:55,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-12-21 21:38:56,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:56,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-21 21:38:56,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158162632] [2020-12-21 21:38:56,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:38:56,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:56,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:38:56,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:38:56,079 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 14 states. [2020-12-21 21:38:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:56,329 INFO L93 Difference]: Finished difference Result 96 states and 124 transitions. [2020-12-21 21:38:56,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:38:56,330 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-12-21 21:38:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:56,331 INFO L225 Difference]: With dead ends: 96 [2020-12-21 21:38:56,331 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:38:56,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:38:56,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:38:56,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-12-21 21:38:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-21 21:38:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-12-21 21:38:56,337 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 46 [2020-12-21 21:38:56,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:56,338 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-12-21 21:38:56,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:38:56,338 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-12-21 21:38:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-21 21:38:56,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:56,339 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:56,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:56,553 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:56,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:56,554 INFO L82 PathProgramCache]: Analyzing trace with hash 411996503, now seen corresponding path program 7 times [2020-12-21 21:38:56,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:56,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312657510] [2020-12-21 21:38:56,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:38:56,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312657510] [2020-12-21 21:38:56,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270824421] [2020-12-21 21:38:56,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:56,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:38:56,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:38:56,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:56,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:38:56,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249927624] [2020-12-21 21:38:56,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:38:56,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:56,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:38:56,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:38:56,795 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 11 states. [2020-12-21 21:38:56,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:56,836 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2020-12-21 21:38:56,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:38:56,837 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-12-21 21:38:56,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:56,838 INFO L225 Difference]: With dead ends: 100 [2020-12-21 21:38:56,838 INFO L226 Difference]: Without dead ends: 60 [2020-12-21 21:38:56,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 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 21:38:56,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-21 21:38:56,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-21 21:38:56,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 21:38:56,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-12-21 21:38:56,844 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 54 [2020-12-21 21:38:56,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:56,844 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-12-21 21:38:56,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:38:56,845 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-12-21 21:38:56,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 21:38:56,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:56,845 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:57,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 21:38:57,059 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:57,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:57,061 INFO L82 PathProgramCache]: Analyzing trace with hash -254488359, now seen corresponding path program 8 times [2020-12-21 21:38:57,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:57,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458524995] [2020-12-21 21:38:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:57,177 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 21:38:57,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458524995] [2020-12-21 21:38:57,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146334086] [2020-12-21 21:38:57,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:57,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:38:57,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:57,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:38:57,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:57,351 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 21:38:57,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:57,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:38:57,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592327968] [2020-12-21 21:38:57,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:38:57,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:57,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:38:57,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:38:57,354 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 12 states. [2020-12-21 21:38:57,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:57,397 INFO L93 Difference]: Finished difference Result 102 states and 128 transitions. [2020-12-21 21:38:57,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:38:57,397 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-12-21 21:38:57,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:57,398 INFO L225 Difference]: With dead ends: 102 [2020-12-21 21:38:57,398 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:38:57,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:38:57,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:38:57,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-21 21:38:57,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-21 21:38:57,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-12-21 21:38:57,404 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 56 [2020-12-21 21:38:57,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:57,405 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-12-21 21:38:57,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:38:57,405 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-12-21 21:38:57,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 21:38:57,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:57,406 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:57,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 21:38:57,621 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:57,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:57,622 INFO L82 PathProgramCache]: Analyzing trace with hash -796313637, now seen corresponding path program 9 times [2020-12-21 21:38:57,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:57,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303836315] [2020-12-21 21:38:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:38:57,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303836315] [2020-12-21 21:38:57,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904778320] [2020-12-21 21:38:57,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:57,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:38:57,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:57,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:38:57,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-12-21 21:38:58,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:58,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-12-21 21:38:58,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343580508] [2020-12-21 21:38:58,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:38:58,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:58,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:38:58,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:38:58,063 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 18 states. [2020-12-21 21:38:58,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:58,385 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2020-12-21 21:38:58,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:38:58,386 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2020-12-21 21:38:58,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:58,387 INFO L225 Difference]: With dead ends: 114 [2020-12-21 21:38:58,387 INFO L226 Difference]: Without dead ends: 74 [2020-12-21 21:38:58,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:38:58,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-21 21:38:58,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2020-12-21 21:38:58,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-21 21:38:58,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2020-12-21 21:38:58,393 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 58 [2020-12-21 21:38:58,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:58,393 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2020-12-21 21:38:58,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:38:58,393 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2020-12-21 21:38:58,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-21 21:38:58,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:58,394 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:58,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:58,608 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:58,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:58,609 INFO L82 PathProgramCache]: Analyzing trace with hash 576129301, now seen corresponding path program 10 times [2020-12-21 21:38:58,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:58,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37021384] [2020-12-21 21:38:58,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-21 21:38:58,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37021384] [2020-12-21 21:38:58,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299377835] [2020-12-21 21:38:58,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:58,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:38:58,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:38:58,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:38:58,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:38:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-21 21:38:58,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:38:58,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:38:59,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838081596] [2020-12-21 21:38:59,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:38:59,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:38:59,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:38:59,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:38:59,002 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand 14 states. [2020-12-21 21:38:59,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:38:59,046 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2020-12-21 21:38:59,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:38:59,047 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2020-12-21 21:38:59,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:38:59,048 INFO L225 Difference]: With dead ends: 118 [2020-12-21 21:38:59,048 INFO L226 Difference]: Without dead ends: 72 [2020-12-21 21:38:59,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:38:59,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-21 21:38:59,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-12-21 21:38:59,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-21 21:38:59,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2020-12-21 21:38:59,054 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 66 [2020-12-21 21:38:59,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:38:59,054 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2020-12-21 21:38:59,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:38:59,054 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2020-12-21 21:38:59,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-21 21:38:59,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:38:59,055 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:38:59,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:38:59,269 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:38:59,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:38:59,270 INFO L82 PathProgramCache]: Analyzing trace with hash 515904919, now seen corresponding path program 11 times [2020-12-21 21:38:59,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:38:59,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358872803] [2020-12-21 21:38:59,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:38:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:38:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-21 21:38:59,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358872803] [2020-12-21 21:38:59,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800792875] [2020-12-21 21:38:59,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:00,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 21:39:00,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:00,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:39:00,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-21 21:39:00,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:00,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:39:00,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418051549] [2020-12-21 21:39:00,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:39:00,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:00,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:39:00,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:39:00,387 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand 15 states. [2020-12-21 21:39:00,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:00,454 INFO L93 Difference]: Finished difference Result 120 states and 150 transitions. [2020-12-21 21:39:00,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:39:00,454 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 68 [2020-12-21 21:39:00,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:00,455 INFO L225 Difference]: With dead ends: 120 [2020-12-21 21:39:00,455 INFO L226 Difference]: Without dead ends: 74 [2020-12-21 21:39:00,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 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 21:39:00,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-21 21:39:00,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-21 21:39:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-21 21:39:00,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2020-12-21 21:39:00,462 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 68 [2020-12-21 21:39:00,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:00,462 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2020-12-21 21:39:00,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:39:00,462 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2020-12-21 21:39:00,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-21 21:39:00,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:00,463 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:00,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:39:00,674 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:00,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:00,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1525151335, now seen corresponding path program 12 times [2020-12-21 21:39:00,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:00,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157105718] [2020-12-21 21:39:00,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-12-21 21:39:00,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157105718] [2020-12-21 21:39:00,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535031719] [2020-12-21 21:39:00,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:01,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:39:01,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:01,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:39:01,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-12-21 21:39:01,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:01,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2020-12-21 21:39:01,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484580724] [2020-12-21 21:39:01,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 21:39:01,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:01,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 21:39:01,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:39:01,600 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand 22 states. [2020-12-21 21:39:02,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:02,054 INFO L93 Difference]: Finished difference Result 132 states and 168 transitions. [2020-12-21 21:39:02,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:39:02,054 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 70 [2020-12-21 21:39:02,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:02,057 INFO L225 Difference]: With dead ends: 132 [2020-12-21 21:39:02,057 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:39:02,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=426, Invalid=764, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:39:02,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:39:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2020-12-21 21:39:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-21 21:39:02,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2020-12-21 21:39:02,073 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 70 [2020-12-21 21:39:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:02,073 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2020-12-21 21:39:02,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 21:39:02,073 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2020-12-21 21:39:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-21 21:39:02,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:02,074 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:02,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:39:02,282 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:02,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:02,283 INFO L82 PathProgramCache]: Analyzing trace with hash -724753373, now seen corresponding path program 13 times [2020-12-21 21:39:02,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:02,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754807344] [2020-12-21 21:39:02,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-21 21:39:02,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754807344] [2020-12-21 21:39:02,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969606424] [2020-12-21 21:39:02,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:02,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:39:02,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-21 21:39:02,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:02,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:39:02,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302544552] [2020-12-21 21:39:02,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:39:02,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:02,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:39:02,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:39:02,702 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand 17 states. [2020-12-21 21:39:02,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:02,761 INFO L93 Difference]: Finished difference Result 136 states and 170 transitions. [2020-12-21 21:39:02,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:39:02,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 78 [2020-12-21 21:39:02,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:02,763 INFO L225 Difference]: With dead ends: 136 [2020-12-21 21:39:02,763 INFO L226 Difference]: Without dead ends: 84 [2020-12-21 21:39:02,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:39:02,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-21 21:39:02,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-12-21 21:39:02,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 21:39:02,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-12-21 21:39:02,773 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 78 [2020-12-21 21:39:02,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:02,774 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-12-21 21:39:02,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:39:02,774 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-12-21 21:39:02,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-21 21:39:02,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:02,775 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:02,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:39:02,989 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:02,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:02,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1098023515, now seen corresponding path program 14 times [2020-12-21 21:39:02,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:02,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013553718] [2020-12-21 21:39:02,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-21 21:39:03,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013553718] [2020-12-21 21:39:03,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424541239] [2020-12-21 21:39:03,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:03,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:39:03,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:03,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:39:03,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:03,536 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-21 21:39:03,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:03,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:39:03,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883164850] [2020-12-21 21:39:03,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:39:03,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:03,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:39:03,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:39:03,539 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 18 states. [2020-12-21 21:39:03,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:03,624 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2020-12-21 21:39:03,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:39:03,625 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-12-21 21:39:03,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:03,626 INFO L225 Difference]: With dead ends: 138 [2020-12-21 21:39:03,626 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:39:03,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:39:03,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:39:03,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-21 21:39:03,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-21 21:39:03,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2020-12-21 21:39:03,632 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 80 [2020-12-21 21:39:03,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:03,633 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2020-12-21 21:39:03,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:39:03,633 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2020-12-21 21:39:03,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-21 21:39:03,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:03,634 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:03,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:03,847 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:03,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:03,848 INFO L82 PathProgramCache]: Analyzing trace with hash 966622887, now seen corresponding path program 15 times [2020-12-21 21:39:03,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:03,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828851972] [2020-12-21 21:39:03,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-21 21:39:04,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828851972] [2020-12-21 21:39:04,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949217218] [2020-12-21 21:39:04,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:04,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-21 21:39:04,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:04,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:39:04,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2020-12-21 21:39:04,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:04,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2020-12-21 21:39:04,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839791037] [2020-12-21 21:39:04,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:39:04,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:04,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:39:04,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:39:04,671 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand 26 states. [2020-12-21 21:39:05,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:05,139 INFO L93 Difference]: Finished difference Result 150 states and 190 transitions. [2020-12-21 21:39:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:39:05,139 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 82 [2020-12-21 21:39:05,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:05,140 INFO L225 Difference]: With dead ends: 150 [2020-12-21 21:39:05,140 INFO L226 Difference]: Without dead ends: 98 [2020-12-21 21:39:05,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1109, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 21:39:05,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-21 21:39:05,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-12-21 21:39:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-21 21:39:05,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2020-12-21 21:39:05,147 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 82 [2020-12-21 21:39:05,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:05,147 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2020-12-21 21:39:05,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:39:05,147 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2020-12-21 21:39:05,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-21 21:39:05,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:05,148 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:05,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:39:05,362 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:05,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:05,363 INFO L82 PathProgramCache]: Analyzing trace with hash -686887199, now seen corresponding path program 16 times [2020-12-21 21:39:05,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:05,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898966159] [2020-12-21 21:39:05,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-12-21 21:39:05,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898966159] [2020-12-21 21:39:05,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084829404] [2020-12-21 21:39:05,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:05,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:39:05,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:05,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:39:05,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-12-21 21:39:05,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:05,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:39:05,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412220967] [2020-12-21 21:39:05,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:39:05,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:05,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:39:05,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:39:05,987 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand 20 states. [2020-12-21 21:39:06,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:06,075 INFO L93 Difference]: Finished difference Result 154 states and 192 transitions. [2020-12-21 21:39:06,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:39:06,076 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 90 [2020-12-21 21:39:06,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:06,077 INFO L225 Difference]: With dead ends: 154 [2020-12-21 21:39:06,077 INFO L226 Difference]: Without dead ends: 96 [2020-12-21 21:39:06,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:39:06,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-21 21:39:06,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-12-21 21:39:06,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-21 21:39:06,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2020-12-21 21:39:06,082 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 90 [2020-12-21 21:39:06,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:06,082 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2020-12-21 21:39:06,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:39:06,083 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2020-12-21 21:39:06,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-21 21:39:06,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:06,084 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:06,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:06,297 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:06,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:06,298 INFO L82 PathProgramCache]: Analyzing trace with hash -862251677, now seen corresponding path program 17 times [2020-12-21 21:39:06,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:06,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407831811] [2020-12-21 21:39:06,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-12-21 21:39:06,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407831811] [2020-12-21 21:39:06,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912414846] [2020-12-21 21:39:06,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:15,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-21 21:39:15,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:15,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:39:15,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-12-21 21:39:15,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:15,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-21 21:39:15,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478965114] [2020-12-21 21:39:15,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:39:15,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:15,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:39:15,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:39:15,327 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand 21 states. [2020-12-21 21:39:15,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:15,399 INFO L93 Difference]: Finished difference Result 156 states and 194 transitions. [2020-12-21 21:39:15,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 21:39:15,404 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 92 [2020-12-21 21:39:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:15,404 INFO L225 Difference]: With dead ends: 156 [2020-12-21 21:39:15,404 INFO L226 Difference]: Without dead ends: 98 [2020-12-21 21:39:15,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:39:15,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-21 21:39:15,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-12-21 21:39:15,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-21 21:39:15,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2020-12-21 21:39:15,415 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 92 [2020-12-21 21:39:15,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:15,415 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2020-12-21 21:39:15,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:39:15,415 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2020-12-21 21:39:15,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-21 21:39:15,418 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:15,418 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:15,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:15,632 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:15,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:15,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1883790491, now seen corresponding path program 18 times [2020-12-21 21:39:15,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:15,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647609026] [2020-12-21 21:39:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-12-21 21:39:15,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647609026] [2020-12-21 21:39:15,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491876246] [2020-12-21 21:39:15,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:18,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-21 21:39:18,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:18,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:39:18,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2020-12-21 21:39:18,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:18,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2020-12-21 21:39:18,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429776568] [2020-12-21 21:39:18,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:39:18,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:18,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:39:18,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:39:18,570 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand 30 states. [2020-12-21 21:39:19,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:19,173 INFO L93 Difference]: Finished difference Result 168 states and 212 transitions. [2020-12-21 21:39:19,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 21:39:19,173 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 94 [2020-12-21 21:39:19,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:19,174 INFO L225 Difference]: With dead ends: 168 [2020-12-21 21:39:19,174 INFO L226 Difference]: Without dead ends: 110 [2020-12-21 21:39:19,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=834, Invalid=1518, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:39:19,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-21 21:39:19,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2020-12-21 21:39:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-21 21:39:19,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2020-12-21 21:39:19,180 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 94 [2020-12-21 21:39:19,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:19,180 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2020-12-21 21:39:19,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:39:19,180 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2020-12-21 21:39:19,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-21 21:39:19,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:19,182 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:19,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 21:39:19,399 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:19,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:19,400 INFO L82 PathProgramCache]: Analyzing trace with hash 483770607, now seen corresponding path program 19 times [2020-12-21 21:39:19,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:19,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812121264] [2020-12-21 21:39:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-21 21:39:19,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812121264] [2020-12-21 21:39:19,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440157867] [2020-12-21 21:39:19,727 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:19,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:39:19,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-21 21:39:19,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:19,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-21 21:39:19,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428791736] [2020-12-21 21:39:19,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:39:19,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:19,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:39:19,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:39:19,960 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand 23 states. [2020-12-21 21:39:20,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:20,030 INFO L93 Difference]: Finished difference Result 172 states and 214 transitions. [2020-12-21 21:39:20,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:39:20,031 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 102 [2020-12-21 21:39:20,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:20,032 INFO L225 Difference]: With dead ends: 172 [2020-12-21 21:39:20,032 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 21:39:20,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:39:20,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 21:39:20,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-12-21 21:39:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-21 21:39:20,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 128 transitions. [2020-12-21 21:39:20,037 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 128 transitions. Word has length 102 [2020-12-21 21:39:20,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:20,038 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 128 transitions. [2020-12-21 21:39:20,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:39:20,038 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 128 transitions. [2020-12-21 21:39:20,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-21 21:39:20,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:20,039 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:20,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:20,254 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:20,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:20,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1310575503, now seen corresponding path program 20 times [2020-12-21 21:39:20,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:20,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194691390] [2020-12-21 21:39:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-21 21:39:20,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194691390] [2020-12-21 21:39:20,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486139644] [2020-12-21 21:39:20,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:20,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:39:20,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:20,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:39:20,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-21 21:39:20,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:20,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-21 21:39:20,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251253718] [2020-12-21 21:39:20,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:39:20,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:20,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:39:20,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:39:20,828 INFO L87 Difference]: Start difference. First operand 107 states and 128 transitions. Second operand 24 states. [2020-12-21 21:39:20,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:20,907 INFO L93 Difference]: Finished difference Result 174 states and 216 transitions. [2020-12-21 21:39:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:39:20,908 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 104 [2020-12-21 21:39:20,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:20,909 INFO L225 Difference]: With dead ends: 174 [2020-12-21 21:39:20,909 INFO L226 Difference]: Without dead ends: 110 [2020-12-21 21:39:20,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:39:20,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-21 21:39:20,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-12-21 21:39:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-21 21:39:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2020-12-21 21:39:20,914 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 104 [2020-12-21 21:39:20,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:20,914 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2020-12-21 21:39:20,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:39:20,914 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2020-12-21 21:39:20,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-21 21:39:20,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:20,916 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:21,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 21:39:21,130 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:21,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:21,131 INFO L82 PathProgramCache]: Analyzing trace with hash 899665779, now seen corresponding path program 21 times [2020-12-21 21:39:21,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:21,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845688935] [2020-12-21 21:39:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-21 21:39:21,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845688935] [2020-12-21 21:39:21,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270540371] [2020-12-21 21:39:21,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:22,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 21:39:22,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:22,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:39:22,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2020-12-21 21:39:22,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:22,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 12] total 34 [2020-12-21 21:39:22,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114205387] [2020-12-21 21:39:22,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-21 21:39:22,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:22,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-21 21:39:22,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:39:22,390 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand 34 states. [2020-12-21 21:39:23,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:23,163 INFO L93 Difference]: Finished difference Result 186 states and 234 transitions. [2020-12-21 21:39:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 21:39:23,164 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 106 [2020-12-21 21:39:23,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:23,165 INFO L225 Difference]: With dead ends: 186 [2020-12-21 21:39:23,165 INFO L226 Difference]: Without dead ends: 122 [2020-12-21 21:39:23,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1089, Invalid=1991, Unknown=0, NotChecked=0, Total=3080 [2020-12-21 21:39:23,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-21 21:39:23,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2020-12-21 21:39:23,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-21 21:39:23,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 140 transitions. [2020-12-21 21:39:23,173 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 140 transitions. Word has length 106 [2020-12-21 21:39:23,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:23,173 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 140 transitions. [2020-12-21 21:39:23,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-21 21:39:23,174 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 140 transitions. [2020-12-21 21:39:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-21 21:39:23,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:23,175 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:23,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 21:39:23,390 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:23,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:23,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1453645485, now seen corresponding path program 22 times [2020-12-21 21:39:23,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:23,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139977466] [2020-12-21 21:39:23,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-12-21 21:39:23,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139977466] [2020-12-21 21:39:23,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646178220] [2020-12-21 21:39:23,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:24,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:39:24,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:24,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:39:24,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-12-21 21:39:24,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:24,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-21 21:39:24,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276253093] [2020-12-21 21:39:24,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:39:24,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:24,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:39:24,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:39:24,304 INFO L87 Difference]: Start difference. First operand 117 states and 140 transitions. Second operand 26 states. [2020-12-21 21:39:24,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:24,394 INFO L93 Difference]: Finished difference Result 190 states and 236 transitions. [2020-12-21 21:39:24,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 21:39:24,395 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 114 [2020-12-21 21:39:24,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:24,396 INFO L225 Difference]: With dead ends: 190 [2020-12-21 21:39:24,396 INFO L226 Difference]: Without dead ends: 120 [2020-12-21 21:39:24,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 114 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 21:39:24,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-21 21:39:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-12-21 21:39:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-21 21:39:24,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2020-12-21 21:39:24,402 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 114 [2020-12-21 21:39:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:24,402 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2020-12-21 21:39:24,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:39:24,402 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2020-12-21 21:39:24,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-21 21:39:24,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:24,404 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:24,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:24,619 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:24,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1272570065, now seen corresponding path program 23 times [2020-12-21 21:39:24,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:24,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797241872] [2020-12-21 21:39:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-12-21 21:39:25,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797241872] [2020-12-21 21:39:25,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009791626] [2020-12-21 21:39:25,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:39:55,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-21 21:39:55,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:39:55,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:39:55,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:39:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked. [2020-12-21 21:39:55,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:39:55,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13] total 37 [2020-12-21 21:39:55,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115573651] [2020-12-21 21:39:55,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 21:39:55,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:39:55,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 21:39:55,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=930, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:39:55,887 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand 37 states. [2020-12-21 21:39:56,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:39:56,720 INFO L93 Difference]: Finished difference Result 202 states and 254 transitions. [2020-12-21 21:39:56,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 21:39:56,720 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 116 [2020-12-21 21:39:56,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:39:56,722 INFO L225 Difference]: With dead ends: 202 [2020-12-21 21:39:56,722 INFO L226 Difference]: Without dead ends: 132 [2020-12-21 21:39:56,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1290, Invalid=2370, Unknown=0, NotChecked=0, Total=3660 [2020-12-21 21:39:56,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-21 21:39:56,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2020-12-21 21:39:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-21 21:39:56,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 152 transitions. [2020-12-21 21:39:56,733 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 152 transitions. Word has length 116 [2020-12-21 21:39:56,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:39:56,733 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 152 transitions. [2020-12-21 21:39:56,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 21:39:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 152 transitions. [2020-12-21 21:39:56,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-21 21:39:56,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:39:56,735 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:39:56,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 21:39:56,949 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:39:56,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:39:56,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1865507257, now seen corresponding path program 24 times [2020-12-21 21:39:56,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:39:56,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135118109] [2020-12-21 21:39:56,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:39:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:39:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2020-12-21 21:39:57,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135118109] [2020-12-21 21:39:57,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926845695] [2020-12-21 21:39:57,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:12,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-21 21:40:12,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:40:12,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:40:12,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:40:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 928 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2020-12-21 21:40:12,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:40:12,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 39 [2020-12-21 21:40:12,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582411717] [2020-12-21 21:40:12,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-21 21:40:12,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:40:12,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-21 21:40:12,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1041, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:40:12,667 INFO L87 Difference]: Start difference. First operand 127 states and 152 transitions. Second operand 39 states. [2020-12-21 21:40:13,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:40:13,575 INFO L93 Difference]: Finished difference Result 216 states and 272 transitions. [2020-12-21 21:40:13,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-21 21:40:13,577 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 124 [2020-12-21 21:40:13,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:40:13,579 INFO L225 Difference]: With dead ends: 216 [2020-12-21 21:40:13,579 INFO L226 Difference]: Without dead ends: 140 [2020-12-21 21:40:13,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1416, Invalid=2616, Unknown=0, NotChecked=0, Total=4032 [2020-12-21 21:40:13,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-21 21:40:13,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2020-12-21 21:40:13,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-21 21:40:13,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 162 transitions. [2020-12-21 21:40:13,585 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 162 transitions. Word has length 124 [2020-12-21 21:40:13,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:40:13,586 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 162 transitions. [2020-12-21 21:40:13,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-21 21:40:13,586 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 162 transitions. [2020-12-21 21:40:13,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-21 21:40:13,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:40:13,588 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:40:13,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:13,789 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:40:13,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:40:13,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1269828109, now seen corresponding path program 25 times [2020-12-21 21:40:13,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:40:13,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198020252] [2020-12-21 21:40:13,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:40:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-12-21 21:40:14,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198020252] [2020-12-21 21:40:14,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55090948] [2020-12-21 21:40:14,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:14,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 21:40:14,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:40:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-12-21 21:40:14,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:40:14,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-21 21:40:14,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580316067] [2020-12-21 21:40:14,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:40:14,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:40:14,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:40:14,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:40:14,565 INFO L87 Difference]: Start difference. First operand 135 states and 162 transitions. Second operand 29 states. [2020-12-21 21:40:14,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:40:14,693 INFO L93 Difference]: Finished difference Result 220 states and 274 transitions. [2020-12-21 21:40:14,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 21:40:14,697 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 132 [2020-12-21 21:40:14,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:40:14,698 INFO L225 Difference]: With dead ends: 220 [2020-12-21 21:40:14,698 INFO L226 Difference]: Without dead ends: 138 [2020-12-21 21:40:14,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 132 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 21:40:14,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-21 21:40:14,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-12-21 21:40:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-21 21:40:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 164 transitions. [2020-12-21 21:40:14,705 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 164 transitions. Word has length 132 [2020-12-21 21:40:14,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:40:14,705 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 164 transitions. [2020-12-21 21:40:14,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:40:14,705 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 164 transitions. [2020-12-21 21:40:14,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-21 21:40:14,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:40:14,707 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:40:14,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 21:40:14,921 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:40:14,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:40:14,922 INFO L82 PathProgramCache]: Analyzing trace with hash 478599669, now seen corresponding path program 26 times [2020-12-21 21:40:14,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:40:14,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479227114] [2020-12-21 21:40:14,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:40:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-12-21 21:40:15,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479227114] [2020-12-21 21:40:15,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386806347] [2020-12-21 21:40:15,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:15,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:40:15,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:40:15,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-21 21:40:15,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:40:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-12-21 21:40:15,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:40:15,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-21 21:40:15,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887508948] [2020-12-21 21:40:15,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:40:15,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:40:15,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:40:15,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:40:15,791 INFO L87 Difference]: Start difference. First operand 137 states and 164 transitions. Second operand 30 states. [2020-12-21 21:40:15,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:40:15,897 INFO L93 Difference]: Finished difference Result 222 states and 276 transitions. [2020-12-21 21:40:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 21:40:15,897 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 134 [2020-12-21 21:40:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:40:15,898 INFO L225 Difference]: With dead ends: 222 [2020-12-21 21:40:15,898 INFO L226 Difference]: Without dead ends: 140 [2020-12-21 21:40:15,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:40:15,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-21 21:40:15,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-12-21 21:40:15,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-21 21:40:15,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2020-12-21 21:40:15,904 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 134 [2020-12-21 21:40:15,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:40:15,905 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2020-12-21 21:40:15,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:40:15,905 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2020-12-21 21:40:15,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-21 21:40:15,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:40:15,906 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:40:16,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:40:16,121 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:40:16,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:40:16,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1385481591, now seen corresponding path program 27 times [2020-12-21 21:40:16,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:40:16,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136118550] [2020-12-21 21:40:16,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:40:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1149 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-12-21 21:40:16,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136118550] [2020-12-21 21:40:16,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749370556] [2020-12-21 21:40:16,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:18,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-21 21:40:18,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:40:18,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:40:18,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:40:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1149 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 939 trivial. 0 not checked. [2020-12-21 21:40:18,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:40:18,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 15] total 43 [2020-12-21 21:40:18,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578691873] [2020-12-21 21:40:18,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-21 21:40:18,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:40:18,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-21 21:40:18,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:40:18,712 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand 43 states. [2020-12-21 21:40:19,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:40:19,876 INFO L93 Difference]: Finished difference Result 234 states and 294 transitions. [2020-12-21 21:40:19,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-21 21:40:19,877 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 136 [2020-12-21 21:40:19,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:40:19,878 INFO L225 Difference]: With dead ends: 234 [2020-12-21 21:40:19,878 INFO L226 Difference]: Without dead ends: 152 [2020-12-21 21:40:19,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1743, Invalid=3227, Unknown=0, NotChecked=0, Total=4970 [2020-12-21 21:40:19,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-21 21:40:19,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2020-12-21 21:40:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-21 21:40:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 176 transitions. [2020-12-21 21:40:19,885 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 176 transitions. Word has length 136 [2020-12-21 21:40:19,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:40:19,886 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 176 transitions. [2020-12-21 21:40:19,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-21 21:40:19,886 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 176 transitions. [2020-12-21 21:40:19,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-21 21:40:19,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:40:19,887 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:40:20,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:20,101 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:40:20,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:40:20,102 INFO L82 PathProgramCache]: Analyzing trace with hash -975122687, now seen corresponding path program 28 times [2020-12-21 21:40:20,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:40:20,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217551361] [2020-12-21 21:40:20,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:40:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2020-12-21 21:40:20,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217551361] [2020-12-21 21:40:20,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869396854] [2020-12-21 21:40:20,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:21,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:40:21,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:40:21,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:40:21,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:40:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 1031 trivial. 0 not checked. [2020-12-21 21:40:21,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:40:21,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 16] total 45 [2020-12-21 21:40:21,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402085769] [2020-12-21 21:40:21,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-21 21:40:21,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:40:21,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-21 21:40:21,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=1396, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 21:40:21,586 INFO L87 Difference]: Start difference. First operand 147 states and 176 transitions. Second operand 45 states. [2020-12-21 21:40:22,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:40:22,799 INFO L93 Difference]: Finished difference Result 248 states and 312 transitions. [2020-12-21 21:40:22,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-21 21:40:22,800 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 144 [2020-12-21 21:40:22,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:40:22,802 INFO L225 Difference]: With dead ends: 248 [2020-12-21 21:40:22,802 INFO L226 Difference]: Without dead ends: 160 [2020-12-21 21:40:22,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1889, Invalid=3513, Unknown=0, NotChecked=0, Total=5402 [2020-12-21 21:40:22,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-21 21:40:22,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2020-12-21 21:40:22,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-21 21:40:22,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 186 transitions. [2020-12-21 21:40:22,810 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 186 transitions. Word has length 144 [2020-12-21 21:40:22,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:40:22,810 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 186 transitions. [2020-12-21 21:40:22,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-21 21:40:22,810 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 186 transitions. [2020-12-21 21:40:22,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-21 21:40:22,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:40:22,811 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:40:23,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:40:23,018 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:40:23,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:40:23,019 INFO L82 PathProgramCache]: Analyzing trace with hash 24167995, now seen corresponding path program 29 times [2020-12-21 21:40:23,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:40:23,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316031824] [2020-12-21 21:40:23,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:40:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:40:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2020-12-21 21:40:23,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316031824] [2020-12-21 21:40:23,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588231778] [2020-12-21 21:40:23,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true