/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-industry-pattern/array_of_struct_single_elem_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:48:26,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:48:26,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:48:26,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 21:48:26,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:48:26,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:48:26,314 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:48:26,320 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:48:26,366 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:48:26,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:48:26,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:48:26,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:48:26,368 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:48:26,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:48:26,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:48:26,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:48:26,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:48:26,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:48:26,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:48:26,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:48:26,370 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:48:26,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:48:26,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:48:26,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:48:26,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:48:26,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:48:26,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:48:26,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:48:26,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:48:26,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:48:26,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:48:26,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:48:26,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:48:26,372 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:48:26,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:48:26,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:48:26,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:48:26,881 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:48:26,884 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:48:26,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_of_struct_single_elem_init.i [2020-12-21 21:48:26,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f04755af/8068d84e19b948af89e294ee658f60a4/FLAG904783a5f [2020-12-21 21:48:27,575 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:48:27,576 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_single_elem_init.i [2020-12-21 21:48:27,583 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f04755af/8068d84e19b948af89e294ee658f60a4/FLAG904783a5f [2020-12-21 21:48:27,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f04755af/8068d84e19b948af89e294ee658f60a4 [2020-12-21 21:48:27,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:48:27,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:48:27,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:48:27,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:48:27,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:48:27,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:48:27" (1/1) ... [2020-12-21 21:48:27,956 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eed5a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:27, skipping insertion in model container [2020-12-21 21:48:27,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:48:27" (1/1) ... [2020-12-21 21:48:27,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:48:27,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:48:28,139 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-industry-pattern/array_of_struct_single_elem_init.i[865,878] [2020-12-21 21:48:28,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:48:30,308 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:48:30,331 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-industry-pattern/array_of_struct_single_elem_init.i[865,878] [2020-12-21 21:48:30,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:48:30,375 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:48:30,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:30 WrapperNode [2020-12-21 21:48:30,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:48:30,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:48:30,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:48:30,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:48:30,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:30" (1/1) ... [2020-12-21 21:48:30,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:30" (1/1) ... [2020-12-21 21:48:30,448 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:48:30,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:48:30,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:48:30,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:48:30,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:30" (1/1) ... [2020-12-21 21:48:30,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:30" (1/1) ... [2020-12-21 21:48:30,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:30" (1/1) ... [2020-12-21 21:48:30,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:30" (1/1) ... [2020-12-21 21:48:30,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:30" (1/1) ... [2020-12-21 21:48:30,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:30" (1/1) ... [2020-12-21 21:48:30,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:30" (1/1) ... [2020-12-21 21:48:30,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:48:30,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:48:30,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:48:30,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:48:30,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:30" (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 21:48:30,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:48:30,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:48:30,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:48:30,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:48:30,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:48:30,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:48:30,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:48:31,029 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:48:31,030 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-21 21:48:31,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:48:31 BoogieIcfgContainer [2020-12-21 21:48:31,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:48:31,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:48:31,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:48:31,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:48:31,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:48:27" (1/3) ... [2020-12-21 21:48:31,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f0b1c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:48:31, skipping insertion in model container [2020-12-21 21:48:31,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:30" (2/3) ... [2020-12-21 21:48:31,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f0b1c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:48:31, skipping insertion in model container [2020-12-21 21:48:31,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:48:31" (3/3) ... [2020-12-21 21:48:31,042 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_single_elem_init.i [2020-12-21 21:48:31,051 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:48:31,057 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:48:31,079 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:48:31,109 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:48:31,110 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:48:31,110 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:48:31,113 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:48:31,113 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:48:31,113 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:48:31,113 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:48:31,114 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:48:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-21 21:48:31,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:48:31,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:31,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:31,155 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:31,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:31,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1140000322, now seen corresponding path program 1 times [2020-12-21 21:48:31,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:31,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510530156] [2020-12-21 21:48:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:31,402 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 21:48:31,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510530156] [2020-12-21 21:48:31,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:48:31,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:48:31,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506735935] [2020-12-21 21:48:31,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:48:31,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:31,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:48:31,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:48:31,437 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-21 21:48:31,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:31,469 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2020-12-21 21:48:31,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:48:31,471 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-21 21:48:31,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:31,484 INFO L225 Difference]: With dead ends: 32 [2020-12-21 21:48:31,484 INFO L226 Difference]: Without dead ends: 15 [2020-12-21 21:48:31,488 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 21:48:31,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-21 21:48:31,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-21 21:48:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-21 21:48:31,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2020-12-21 21:48:31,528 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 9 [2020-12-21 21:48:31,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:31,529 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2020-12-21 21:48:31,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:48:31,529 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2020-12-21 21:48:31,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:48:31,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:31,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:31,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:48:31,532 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:31,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:31,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1807612939, now seen corresponding path program 1 times [2020-12-21 21:48:31,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:31,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620019023] [2020-12-21 21:48:31,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:31,625 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 21:48:31,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620019023] [2020-12-21 21:48:31,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:48:31,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:48:31,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860248075] [2020-12-21 21:48:31,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:48:31,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:31,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:48:31,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:48:31,629 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 3 states. [2020-12-21 21:48:31,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:31,678 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2020-12-21 21:48:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:48:31,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-21 21:48:31,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:31,680 INFO L225 Difference]: With dead ends: 36 [2020-12-21 21:48:31,681 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 21:48:31,682 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 21:48:31,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 21:48:31,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2020-12-21 21:48:31,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-21 21:48:31,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2020-12-21 21:48:31,687 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2020-12-21 21:48:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:31,688 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-12-21 21:48:31,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:48:31,688 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2020-12-21 21:48:31,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 21:48:31,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:31,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:31,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:48:31,690 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:31,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:31,690 INFO L82 PathProgramCache]: Analyzing trace with hash -2006795472, now seen corresponding path program 1 times [2020-12-21 21:48:31,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:31,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948925940] [2020-12-21 21:48:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:31,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948925940] [2020-12-21 21:48:31,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571924032] [2020-12-21 21:48:31,846 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 21:48:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:31,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:48:31,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:32,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:32,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:48:32,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942518688] [2020-12-21 21:48:32,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:48:32,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:32,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:48:32,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:48:32,047 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 5 states. [2020-12-21 21:48:32,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:32,117 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-12-21 21:48:32,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:48:32,118 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-21 21:48:32,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:32,119 INFO L225 Difference]: With dead ends: 48 [2020-12-21 21:48:32,119 INFO L226 Difference]: Without dead ends: 39 [2020-12-21 21:48:32,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:48:32,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-21 21:48:32,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2020-12-21 21:48:32,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-21 21:48:32,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2020-12-21 21:48:32,131 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 13 [2020-12-21 21:48:32,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:32,131 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2020-12-21 21:48:32,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:48:32,132 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2020-12-21 21:48:32,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:48:32,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:32,132 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:32,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 21:48:32,347 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:32,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:32,348 INFO L82 PathProgramCache]: Analyzing trace with hash -2104533781, now seen corresponding path program 2 times [2020-12-21 21:48:32,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:32,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403378492] [2020-12-21 21:48:32,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:32,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:32,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403378492] [2020-12-21 21:48:32,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064189208] [2020-12-21 21:48:32,449 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 21:48:32,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:48:32,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:32,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:48:32,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:32,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:32,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:48:32,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845024158] [2020-12-21 21:48:32,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:48:32,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:32,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:48:32,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:48:32,687 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 6 states. [2020-12-21 21:48:32,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:32,766 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2020-12-21 21:48:32,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:48:32,767 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-21 21:48:32,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:32,769 INFO L225 Difference]: With dead ends: 60 [2020-12-21 21:48:32,769 INFO L226 Difference]: Without dead ends: 51 [2020-12-21 21:48:32,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:48:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-21 21:48:32,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 24. [2020-12-21 21:48:32,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 21:48:32,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-12-21 21:48:32,776 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 17 [2020-12-21 21:48:32,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:32,777 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-12-21 21:48:32,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:48:32,777 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2020-12-21 21:48:32,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 21:48:32,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:32,778 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:32,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:32,994 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:32,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:32,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1842260262, now seen corresponding path program 3 times [2020-12-21 21:48:32,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:32,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646887031] [2020-12-21 21:48:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:33,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646887031] [2020-12-21 21:48:33,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439533356] [2020-12-21 21:48:33,105 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 21:48:33,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:48:33,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:33,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:48:33,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:33,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:33,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:48:33,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544438236] [2020-12-21 21:48:33,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:48:33,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:33,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:48:33,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:48:33,359 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 7 states. [2020-12-21 21:48:33,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:33,459 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2020-12-21 21:48:33,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:48:33,460 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-12-21 21:48:33,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:33,461 INFO L225 Difference]: With dead ends: 72 [2020-12-21 21:48:33,461 INFO L226 Difference]: Without dead ends: 63 [2020-12-21 21:48:33,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:48:33,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-21 21:48:33,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 28. [2020-12-21 21:48:33,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 21:48:33,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-12-21 21:48:33,469 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 21 [2020-12-21 21:48:33,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:33,469 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-12-21 21:48:33,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:48:33,469 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-12-21 21:48:33,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 21:48:33,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:33,470 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:33,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:33,685 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:33,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:33,687 INFO L82 PathProgramCache]: Analyzing trace with hash -741908511, now seen corresponding path program 4 times [2020-12-21 21:48:33,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:33,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538921141] [2020-12-21 21:48:33,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:33,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538921141] [2020-12-21 21:48:33,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585191410] [2020-12-21 21:48:33,871 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 21:48:34,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:48:34,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:34,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:48:34,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:34,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:34,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:48:34,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304126909] [2020-12-21 21:48:34,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:48:34,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:34,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:48:34,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:48:34,155 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 8 states. [2020-12-21 21:48:34,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:34,256 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2020-12-21 21:48:34,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:48:34,257 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-12-21 21:48:34,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:34,258 INFO L225 Difference]: With dead ends: 84 [2020-12-21 21:48:34,258 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 21:48:34,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:48:34,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 21:48:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 32. [2020-12-21 21:48:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 21:48:34,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-12-21 21:48:34,266 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 25 [2020-12-21 21:48:34,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:34,266 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-12-21 21:48:34,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:48:34,267 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-12-21 21:48:34,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:48:34,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:34,268 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:34,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:34,481 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:34,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:34,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1933557476, now seen corresponding path program 5 times [2020-12-21 21:48:34,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:34,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772036986] [2020-12-21 21:48:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:34,688 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:34,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772036986] [2020-12-21 21:48:34,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262990068] [2020-12-21 21:48:34,689 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 21:48:35,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 21:48:35,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:35,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:48:35,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:35,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:35,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:48:35,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230631709] [2020-12-21 21:48:35,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:48:35,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:35,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:48:35,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:48:35,422 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 9 states. [2020-12-21 21:48:35,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:35,513 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2020-12-21 21:48:35,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:48:35,514 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-12-21 21:48:35,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:35,515 INFO L225 Difference]: With dead ends: 96 [2020-12-21 21:48:35,515 INFO L226 Difference]: Without dead ends: 87 [2020-12-21 21:48:35,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:48:35,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-21 21:48:35,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 36. [2020-12-21 21:48:35,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 21:48:35,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-12-21 21:48:35,523 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 29 [2020-12-21 21:48:35,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:35,524 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-12-21 21:48:35,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:48:35,524 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-12-21 21:48:35,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 21:48:35,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:35,525 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:35,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-21 21:48:35,738 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:35,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:35,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1872760023, now seen corresponding path program 6 times [2020-12-21 21:48:35,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:35,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45701651] [2020-12-21 21:48:35,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:35,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45701651] [2020-12-21 21:48:35,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294142726] [2020-12-21 21:48:35,876 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 21:48:36,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:48:36,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:36,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:48:36,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:36,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:36,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:48:36,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582513969] [2020-12-21 21:48:36,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:48:36,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:36,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:48:36,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:48:36,702 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 10 states. [2020-12-21 21:48:36,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:36,791 INFO L93 Difference]: Finished difference Result 108 states and 136 transitions. [2020-12-21 21:48:36,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:48:36,791 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-12-21 21:48:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:36,793 INFO L225 Difference]: With dead ends: 108 [2020-12-21 21:48:36,793 INFO L226 Difference]: Without dead ends: 99 [2020-12-21 21:48:36,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:48:36,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-21 21:48:36,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 40. [2020-12-21 21:48:36,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 21:48:36,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-12-21 21:48:36,801 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 33 [2020-12-21 21:48:36,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:36,801 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-12-21 21:48:36,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:48:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-12-21 21:48:36,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-21 21:48:36,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:36,803 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:37,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:37,020 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:37,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:37,021 INFO L82 PathProgramCache]: Analyzing trace with hash 32342802, now seen corresponding path program 7 times [2020-12-21 21:48:37,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:37,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877985670] [2020-12-21 21:48:37,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:37,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:37,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877985670] [2020-12-21 21:48:37,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829662805] [2020-12-21 21:48:37,212 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 21:48:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:37,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:48:37,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:37,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:37,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:48:37,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281800821] [2020-12-21 21:48:37,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:48:37,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:37,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:48:37,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:48:37,368 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 11 states. [2020-12-21 21:48:37,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:37,474 INFO L93 Difference]: Finished difference Result 120 states and 151 transitions. [2020-12-21 21:48:37,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:48:37,475 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-12-21 21:48:37,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:37,476 INFO L225 Difference]: With dead ends: 120 [2020-12-21 21:48:37,476 INFO L226 Difference]: Without dead ends: 111 [2020-12-21 21:48:37,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:48:37,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-21 21:48:37,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 44. [2020-12-21 21:48:37,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 21:48:37,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2020-12-21 21:48:37,484 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 37 [2020-12-21 21:48:37,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:37,484 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-12-21 21:48:37,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:48:37,484 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2020-12-21 21:48:37,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:48:37,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:37,486 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:37,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:37,702 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:37,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:37,703 INFO L82 PathProgramCache]: Analyzing trace with hash 667902925, now seen corresponding path program 8 times [2020-12-21 21:48:37,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:37,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418000615] [2020-12-21 21:48:37,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:37,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418000615] [2020-12-21 21:48:37,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812547738] [2020-12-21 21:48:37,900 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 21:48:37,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:48:37,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:38,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:48:38,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:38,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:38,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:48:38,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802107101] [2020-12-21 21:48:38,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:48:38,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:38,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:48:38,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:48:38,069 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 12 states. [2020-12-21 21:48:38,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:38,171 INFO L93 Difference]: Finished difference Result 132 states and 166 transitions. [2020-12-21 21:48:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:48:38,172 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-12-21 21:48:38,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:38,173 INFO L225 Difference]: With dead ends: 132 [2020-12-21 21:48:38,173 INFO L226 Difference]: Without dead ends: 123 [2020-12-21 21:48:38,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 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 21:48:38,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-21 21:48:38,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 48. [2020-12-21 21:48:38,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 21:48:38,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2020-12-21 21:48:38,180 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 41 [2020-12-21 21:48:38,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:38,180 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2020-12-21 21:48:38,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:48:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2020-12-21 21:48:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 21:48:38,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:38,182 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:38,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 21:48:38,398 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:38,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:38,399 INFO L82 PathProgramCache]: Analyzing trace with hash -737382648, now seen corresponding path program 9 times [2020-12-21 21:48:38,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:38,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605544402] [2020-12-21 21:48:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:38,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605544402] [2020-12-21 21:48:38,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293840776] [2020-12-21 21:48:38,541 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 21:48:45,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 21:48:45,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:45,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:48:45,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:45,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:45,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:48:45,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137114795] [2020-12-21 21:48:45,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:48:45,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:45,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:48:45,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:48:45,442 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 13 states. [2020-12-21 21:48:45,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:45,582 INFO L93 Difference]: Finished difference Result 144 states and 181 transitions. [2020-12-21 21:48:45,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:48:45,583 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-12-21 21:48:45,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:45,588 INFO L225 Difference]: With dead ends: 144 [2020-12-21 21:48:45,588 INFO L226 Difference]: Without dead ends: 135 [2020-12-21 21:48:45,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:48:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-21 21:48:45,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 52. [2020-12-21 21:48:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-21 21:48:45,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2020-12-21 21:48:45,608 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 45 [2020-12-21 21:48:45,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:45,608 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2020-12-21 21:48:45,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:48:45,609 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2020-12-21 21:48:45,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 21:48:45,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:45,610 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:45,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:45,824 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:45,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:45,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1207212861, now seen corresponding path program 10 times [2020-12-21 21:48:45,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:45,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331041481] [2020-12-21 21:48:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:46,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331041481] [2020-12-21 21:48:46,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13237338] [2020-12-21 21:48:46,007 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 21:48:48,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:48:48,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:48,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:48:48,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:48,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:48,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:48:48,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961626559] [2020-12-21 21:48:48,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:48:48,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:48,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:48:48,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:48:48,416 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 14 states. [2020-12-21 21:48:48,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:48,570 INFO L93 Difference]: Finished difference Result 156 states and 196 transitions. [2020-12-21 21:48:48,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:48:48,571 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-12-21 21:48:48,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:48,572 INFO L225 Difference]: With dead ends: 156 [2020-12-21 21:48:48,572 INFO L226 Difference]: Without dead ends: 147 [2020-12-21 21:48:48,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 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 21:48:48,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-21 21:48:48,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 56. [2020-12-21 21:48:48,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 21:48:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-12-21 21:48:48,581 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 49 [2020-12-21 21:48:48,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:48,582 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-12-21 21:48:48,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:48:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-12-21 21:48:48,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 21:48:48,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:48,583 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:48,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:48,797 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:48,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:48,798 INFO L82 PathProgramCache]: Analyzing trace with hash -204274434, now seen corresponding path program 11 times [2020-12-21 21:48:48,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:48,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904357120] [2020-12-21 21:48:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:48,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904357120] [2020-12-21 21:48:48,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857027102] [2020-12-21 21:48:48,993 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