/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_compare_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:23:45,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:23:45,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:23:45,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:23:45,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:23:45,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:23:45,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:23:45,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:23:45,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:23:45,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:23:45,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:23:45,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-12-21 21:23:45,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:23:45,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:23:45,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:23:45,502 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:23:45,532 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:23:45,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:23:45,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:23:45,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:23:45,535 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:23:45,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:23:45,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:23:45,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:23:45,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:23:45,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:23:45,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:23:45,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:23:45,538 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:23:45,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:23:45,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:23:45,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:23:45,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:23:45,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:23:45,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:23:45,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:23:45,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:23:45,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:23:45,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:23:45,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:23:45,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:23:45,541 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:23:45,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:23:46,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:23:46,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:23:46,045 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:23:46,046 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:23:46,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_compare_ground.i [2020-12-21 21:23:46,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bb364441/2b619d259f54435fa6e76fbf2446a6c2/FLAG0f6e1f750 [2020-12-21 21:23:46,820 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:23:46,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_compare_ground.i [2020-12-21 21:23:46,833 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bb364441/2b619d259f54435fa6e76fbf2446a6c2/FLAG0f6e1f750 [2020-12-21 21:23:47,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bb364441/2b619d259f54435fa6e76fbf2446a6c2 [2020-12-21 21:23:47,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:23:47,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:23:47,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:23:47,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:23:47,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:23:47,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:23:47" (1/1) ... [2020-12-21 21:23:47,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bf90185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:23:47, skipping insertion in model container [2020-12-21 21:23:47,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:23:47" (1/1) ... [2020-12-21 21:23:47,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:23:47,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:23:47,473 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_compare_ground.i[816,829] [2020-12-21 21:23:47,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:23:47,499 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:23:47,514 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_compare_ground.i[816,829] [2020-12-21 21:23:47,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:23:47,539 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:23:47,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:23:47 WrapperNode [2020-12-21 21:23:47,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:23:47,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:23:47,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:23:47,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:23:47,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:23:47" (1/1) ... [2020-12-21 21:23:47,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:23:47" (1/1) ... [2020-12-21 21:23:47,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:23:47,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:23:47,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:23:47,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:23:47,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:23:47" (1/1) ... [2020-12-21 21:23:47,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:23:47" (1/1) ... [2020-12-21 21:23:47,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:23:47" (1/1) ... [2020-12-21 21:23:47,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:23:47" (1/1) ... [2020-12-21 21:23:47,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:23:47" (1/1) ... [2020-12-21 21:23:47,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:23:47" (1/1) ... [2020-12-21 21:23:47,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:23:47" (1/1) ... [2020-12-21 21:23:47,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:23:47,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:23:47,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:23:47,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:23:47,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:23:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:23:47,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:23:47,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:23:47,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:23:47,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:23:47,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:23:47,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:23:47,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:23:48,042 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:23:48,042 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-21 21:23:48,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:23:48 BoogieIcfgContainer [2020-12-21 21:23:48,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:23:48,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:23:48,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:23:48,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:23:48,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:23:47" (1/3) ... [2020-12-21 21:23:48,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5c6a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:23:48, skipping insertion in model container [2020-12-21 21:23:48,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:23:47" (2/3) ... [2020-12-21 21:23:48,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5c6a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:23:48, skipping insertion in model container [2020-12-21 21:23:48,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:23:48" (3/3) ... [2020-12-21 21:23:48,056 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_compare_ground.i [2020-12-21 21:23:48,064 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:23:48,071 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:23:48,097 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:23:48,135 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:23:48,136 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:23:48,136 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:23:48,136 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:23:48,137 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:23:48,137 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:23:48,137 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:23:48,137 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:23:48,156 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-21 21:23:48,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:23:48,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:48,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:48,165 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:48,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:48,175 INFO L82 PathProgramCache]: Analyzing trace with hash -2005121311, now seen corresponding path program 1 times [2020-12-21 21:23:48,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:48,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539812628] [2020-12-21 21:23:48,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:48,372 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 21:23:48,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539812628] [2020-12-21 21:23:48,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:23:48,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:23:48,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008869565] [2020-12-21 21:23:48,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:23:48,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:48,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:23:48,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:23:48,399 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-21 21:23:48,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:48,416 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2020-12-21 21:23:48,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:23:48,418 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-21 21:23:48,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:48,427 INFO L225 Difference]: With dead ends: 34 [2020-12-21 21:23:48,427 INFO L226 Difference]: Without dead ends: 15 [2020-12-21 21:23:48,430 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 21:23:48,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-21 21:23:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-21 21:23:48,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-21 21:23:48,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-21 21:23:48,468 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2020-12-21 21:23:48,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:48,469 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-21 21:23:48,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:23:48,469 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-21 21:23:48,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:23:48,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:48,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:48,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:23:48,471 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:48,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:48,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2015280042, now seen corresponding path program 1 times [2020-12-21 21:23:48,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:48,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366976660] [2020-12-21 21:23:48,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:48,572 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 21:23:48,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366976660] [2020-12-21 21:23:48,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:23:48,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:23:48,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573429610] [2020-12-21 21:23:48,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:23:48,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:48,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:23:48,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:23:48,580 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2020-12-21 21:23:48,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:48,601 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-12-21 21:23:48,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:23:48,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-21 21:23:48,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:48,604 INFO L225 Difference]: With dead ends: 28 [2020-12-21 21:23:48,604 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 21:23:48,606 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 21:23:48,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 21:23:48,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-12-21 21:23:48,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-21 21:23:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-12-21 21:23:48,611 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2020-12-21 21:23:48,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:48,612 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-12-21 21:23:48,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:23:48,612 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-12-21 21:23:48,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 21:23:48,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:48,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:48,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:23:48,614 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:48,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:48,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1565815188, now seen corresponding path program 1 times [2020-12-21 21:23:48,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:48,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922961735] [2020-12-21 21:23:48,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:48,709 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 21:23:48,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922961735] [2020-12-21 21:23:48,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658077877] [2020-12-21 21:23:48,710 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 21:23:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:48,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:23:48,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:48,838 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 21:23:48,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:23:48,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:23:48,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138978220] [2020-12-21 21:23:48,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:23:48,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:48,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:23:48,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:23:48,842 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2020-12-21 21:23:48,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:48,863 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-12-21 21:23:48,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:23:48,865 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-21 21:23:48,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:48,866 INFO L225 Difference]: With dead ends: 26 [2020-12-21 21:23:48,866 INFO L226 Difference]: Without dead ends: 19 [2020-12-21 21:23:48,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:23:48,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-21 21:23:48,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-12-21 21:23:48,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 21:23:48,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-21 21:23:48,872 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2020-12-21 21:23:48,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:48,872 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-21 21:23:48,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:23:48,872 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-21 21:23:48,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 21:23:48,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:48,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:49,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 21:23:49,089 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:49,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:49,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1959146159, now seen corresponding path program 1 times [2020-12-21 21:23:49,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:49,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097970151] [2020-12-21 21:23:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:23:49,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097970151] [2020-12-21 21:23:49,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968804337] [2020-12-21 21:23:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:23:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:49,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:23:49,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:23:49,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:23:49,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:23:49,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796623589] [2020-12-21 21:23:49,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:23:49,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:49,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:23:49,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:23:49,295 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2020-12-21 21:23:49,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:49,312 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-12-21 21:23:49,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:23:49,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-21 21:23:49,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:49,314 INFO L225 Difference]: With dead ends: 27 [2020-12-21 21:23:49,314 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 21:23:49,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:23:49,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 21:23:49,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-21 21:23:49,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 21:23:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-21 21:23:49,322 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-12-21 21:23:49,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:49,322 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-21 21:23:49,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:23:49,323 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-21 21:23:49,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 21:23:49,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:49,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:49,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:23:49,539 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:49,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:49,541 INFO L82 PathProgramCache]: Analyzing trace with hash -184138797, now seen corresponding path program 1 times [2020-12-21 21:23:49,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:49,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256601438] [2020-12-21 21:23:49,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:23:49,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256601438] [2020-12-21 21:23:49,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036233673] [2020-12-21 21:23:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:23:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:49,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:23:49,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:23:49,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:49,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:23:49,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102341049] [2020-12-21 21:23:49,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:23:49,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:49,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:23:49,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:23:49,761 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2020-12-21 21:23:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:49,789 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-12-21 21:23:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:23:49,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-21 21:23:49,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:49,791 INFO L225 Difference]: With dead ends: 32 [2020-12-21 21:23:49,792 INFO L226 Difference]: Without dead ends: 20 [2020-12-21 21:23:49,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:23:49,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-21 21:23:49,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-21 21:23:49,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 21:23:49,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-12-21 21:23:49,797 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2020-12-21 21:23:49,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:49,798 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-12-21 21:23:49,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:23:49,798 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-12-21 21:23:49,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 21:23:49,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:49,799 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:50,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:23:50,014 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:50,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:50,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1017926315, now seen corresponding path program 2 times [2020-12-21 21:23:50,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:50,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457025760] [2020-12-21 21:23:50,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:23:50,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457025760] [2020-12-21 21:23:50,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452138352] [2020-12-21 21:23:50,117 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 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 21:23:50,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:23:50,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:23:50,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:23:50,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:23:50,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:50,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-21 21:23:50,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155291322] [2020-12-21 21:23:50,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:23:50,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:50,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:23:50,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:23:50,351 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2020-12-21 21:23:50,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:50,452 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-12-21 21:23:50,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:23:50,453 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-21 21:23:50,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:50,457 INFO L225 Difference]: With dead ends: 39 [2020-12-21 21:23:50,457 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 21:23:50,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:23:50,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 21:23:50,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-21 21:23:50,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 21:23:50,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-21 21:23:50,471 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-12-21 21:23:50,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:50,471 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-21 21:23:50,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:23:50,471 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-21 21:23:50,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 21:23:50,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:50,472 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:50,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:23:50,686 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:50,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:50,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1705829328, now seen corresponding path program 3 times [2020-12-21 21:23:50,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:50,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137722405] [2020-12-21 21:23:50,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:23:50,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137722405] [2020-12-21 21:23:50,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861940761] [2020-12-21 21:23:50,767 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 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 21:23:50,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:23:50,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:23:50,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:23:50,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 21:23:50,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:50,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-21 21:23:50,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52174433] [2020-12-21 21:23:50,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:23:50,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:50,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:23:50,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:23:50,930 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 9 states. [2020-12-21 21:23:51,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:51,011 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-12-21 21:23:51,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:23:51,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-21 21:23:51,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:51,015 INFO L225 Difference]: With dead ends: 47 [2020-12-21 21:23:51,015 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 21:23:51,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:23:51,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 21:23:51,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-12-21 21:23:51,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 21:23:51,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-21 21:23:51,029 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2020-12-21 21:23:51,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:51,029 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-21 21:23:51,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:23:51,029 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-21 21:23:51,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 21:23:51,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:51,031 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:51,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-21 21:23:51,247 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:51,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:51,248 INFO L82 PathProgramCache]: Analyzing trace with hash 2018980537, now seen corresponding path program 4 times [2020-12-21 21:23:51,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:51,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142055270] [2020-12-21 21:23:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:23:51,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142055270] [2020-12-21 21:23:51,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100629989] [2020-12-21 21:23:51,340 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 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 21:23:51,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:23:51,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:23:51,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:23:51,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:23:51,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:51,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:23:51,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080300098] [2020-12-21 21:23:51,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:23:51,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:51,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:23:51,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:23:51,485 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 8 states. [2020-12-21 21:23:51,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:51,527 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-12-21 21:23:51,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:23:51,528 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-12-21 21:23:51,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:51,528 INFO L225 Difference]: With dead ends: 50 [2020-12-21 21:23:51,529 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 21:23:51,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 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 21:23:51,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 21:23:51,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-12-21 21:23:51,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 21:23:51,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-21 21:23:51,533 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2020-12-21 21:23:51,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:51,533 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-21 21:23:51,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:23:51,533 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-21 21:23:51,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 21:23:51,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:51,534 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:51,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:23:51,748 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:51,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:51,749 INFO L82 PathProgramCache]: Analyzing trace with hash 391670075, now seen corresponding path program 5 times [2020-12-21 21:23:51,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:51,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179956434] [2020-12-21 21:23:51,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:23:51,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179956434] [2020-12-21 21:23:51,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812247516] [2020-12-21 21:23:51,858 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 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 21:23:52,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 21:23:52,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:23:52,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:23:52,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-21 21:23:52,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:52,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-21 21:23:52,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094208058] [2020-12-21 21:23:52,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:23:52,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:52,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:23:52,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:23:52,163 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 12 states. [2020-12-21 21:23:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:52,234 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-12-21 21:23:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:23:52,234 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-12-21 21:23:52,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:52,235 INFO L225 Difference]: With dead ends: 57 [2020-12-21 21:23:52,235 INFO L226 Difference]: Without dead ends: 39 [2020-12-21 21:23:52,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:23:52,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-21 21:23:52,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-12-21 21:23:52,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 21:23:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-21 21:23:52,241 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 28 [2020-12-21 21:23:52,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:52,242 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-21 21:23:52,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:23:52,242 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-21 21:23:52,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 21:23:52,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:52,243 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:52,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:23:52,458 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:52,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:52,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1709007242, now seen corresponding path program 6 times [2020-12-21 21:23:52,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:52,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118579527] [2020-12-21 21:23:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-21 21:23:52,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118579527] [2020-12-21 21:23:52,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556213704] [2020-12-21 21:23:52,571 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 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 21:23:52,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 21:23:52,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:23:52,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:23:52,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:23:52,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:52,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-12-21 21:23:52,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565744784] [2020-12-21 21:23:52,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:23:52,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:52,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:23:52,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:23:52,833 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 15 states. [2020-12-21 21:23:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:53,136 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-12-21 21:23:53,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:23:53,136 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-12-21 21:23:53,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:53,137 INFO L225 Difference]: With dead ends: 65 [2020-12-21 21:23:53,137 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 21:23:53,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:23:53,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 21:23:53,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-12-21 21:23:53,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 21:23:53,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-12-21 21:23:53,144 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2020-12-21 21:23:53,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:53,144 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-12-21 21:23:53,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:23:53,144 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-12-21 21:23:53,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 21:23:53,145 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:53,146 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:53,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 21:23:53,359 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:53,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:53,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1640083010, now seen corresponding path program 1 times [2020-12-21 21:23:53,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:53,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593235416] [2020-12-21 21:23:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:23:53,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593235416] [2020-12-21 21:23:53,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937680607] [2020-12-21 21:23:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 21:23:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:53,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:23:53,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:23:53,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:53,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:23:53,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473479577] [2020-12-21 21:23:53,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:23:53,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:53,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:23:53,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:23:53,658 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 11 states. [2020-12-21 21:23:53,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:53,702 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-12-21 21:23:53,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:23:53,703 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-12-21 21:23:53,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:53,704 INFO L225 Difference]: With dead ends: 66 [2020-12-21 21:23:53,704 INFO L226 Difference]: Without dead ends: 43 [2020-12-21 21:23:53,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 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 21:23:53,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-21 21:23:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-12-21 21:23:53,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-21 21:23:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-12-21 21:23:53,711 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2020-12-21 21:23:53,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:53,711 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-12-21 21:23:53,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:23:53,711 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-12-21 21:23:53,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:23:53,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:53,713 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:53,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:23:53,928 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1543160196, now seen corresponding path program 2 times [2020-12-21 21:23:53,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:53,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191233249] [2020-12-21 21:23:53,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:23:54,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191233249] [2020-12-21 21:23:54,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596524915] [2020-12-21 21:23:54,061 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 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 21:23:54,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:23:54,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:23:54,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:23:54,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:23:54,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:54,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:23:54,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054756840] [2020-12-21 21:23:54,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:23:54,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:54,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:23:54,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:23:54,203 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 12 states. [2020-12-21 21:23:54,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:54,258 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-12-21 21:23:54,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:23:54,262 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-12-21 21:23:54,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:54,262 INFO L225 Difference]: With dead ends: 68 [2020-12-21 21:23:54,262 INFO L226 Difference]: Without dead ends: 45 [2020-12-21 21:23:54,263 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 21:23:54,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-21 21:23:54,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-12-21 21:23:54,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 21:23:54,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-12-21 21:23:54,269 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2020-12-21 21:23:54,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:54,269 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-12-21 21:23:54,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:23:54,269 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-12-21 21:23:54,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-21 21:23:54,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:54,270 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:54,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:23:54,484 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:54,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:54,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1405350842, now seen corresponding path program 3 times [2020-12-21 21:23:54,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:54,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576305527] [2020-12-21 21:23:54,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:23:54,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576305527] [2020-12-21 21:23:54,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186780160] [2020-12-21 21:23:54,620 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 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 21:23:54,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 21:23:54,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:23:54,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:23:54,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-12-21 21:23:54,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:54,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 17 [2020-12-21 21:23:54,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729550770] [2020-12-21 21:23:54,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:23:54,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:54,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:23:54,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:23:54,805 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 17 states. [2020-12-21 21:23:54,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:54,893 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2020-12-21 21:23:54,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:23:54,894 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-12-21 21:23:54,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:54,894 INFO L225 Difference]: With dead ends: 75 [2020-12-21 21:23:54,894 INFO L226 Difference]: Without dead ends: 52 [2020-12-21 21:23:54,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:23:54,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-21 21:23:54,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-12-21 21:23:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-21 21:23:54,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-12-21 21:23:54,901 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 43 [2020-12-21 21:23:54,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:54,901 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-12-21 21:23:54,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:23:54,901 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-12-21 21:23:54,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-21 21:23:54,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:54,902 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:55,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:23:55,116 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:55,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:55,117 INFO L82 PathProgramCache]: Analyzing trace with hash -75756645, now seen corresponding path program 4 times [2020-12-21 21:23:55,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:55,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838798902] [2020-12-21 21:23:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:23:55,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838798902] [2020-12-21 21:23:55,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074974490] [2020-12-21 21:23:55,253 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 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 21:23:55,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:23:55,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:23:55,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:23:55,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:23:55,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:55,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:23:55,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588491211] [2020-12-21 21:23:55,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:23:55,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:55,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:23:55,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:23:55,433 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 14 states. [2020-12-21 21:23:55,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:55,477 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-12-21 21:23:55,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:23:55,478 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-12-21 21:23:55,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:55,481 INFO L225 Difference]: With dead ends: 78 [2020-12-21 21:23:55,481 INFO L226 Difference]: Without dead ends: 52 [2020-12-21 21:23:55,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 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 21:23:55,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-21 21:23:55,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-21 21:23:55,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-21 21:23:55,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-12-21 21:23:55,495 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2020-12-21 21:23:55,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:55,495 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-12-21 21:23:55,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:23:55,495 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-12-21 21:23:55,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-21 21:23:55,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:55,500 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:55,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:23:55,702 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:55,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:55,703 INFO L82 PathProgramCache]: Analyzing trace with hash 390108317, now seen corresponding path program 5 times [2020-12-21 21:23:55,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:55,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439220794] [2020-12-21 21:23:55,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:23:55,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439220794] [2020-12-21 21:23:55,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574824673] [2020-12-21 21:23:55,841 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 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 21:23:56,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 21:23:56,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:23:56,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:23:56,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:23:56,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:56,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:23:56,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360119600] [2020-12-21 21:23:56,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:23:56,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:56,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:23:56,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:23:56,859 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 15 states. [2020-12-21 21:23:56,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:56,921 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2020-12-21 21:23:56,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:23:56,922 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-12-21 21:23:56,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:56,923 INFO L225 Difference]: With dead ends: 80 [2020-12-21 21:23:56,923 INFO L226 Difference]: Without dead ends: 54 [2020-12-21 21:23:56,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 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 21:23:56,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-21 21:23:56,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-21 21:23:56,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-21 21:23:56,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-12-21 21:23:56,930 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2020-12-21 21:23:56,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:56,930 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-12-21 21:23:56,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:23:56,930 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-12-21 21:23:56,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-21 21:23:56,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:56,931 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:57,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:23:57,147 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:57,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:57,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1409738015, now seen corresponding path program 6 times [2020-12-21 21:23:57,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:57,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764676686] [2020-12-21 21:23:57,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:23:57,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764676686] [2020-12-21 21:23:57,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392321389] [2020-12-21 21:23:57,411 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 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 21:23:57,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-21 21:23:57,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:23:57,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:23:57,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-21 21:23:57,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:57,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2020-12-21 21:23:57,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848561730] [2020-12-21 21:23:57,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:23:57,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:57,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:23:57,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:23:57,917 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 21 states. [2020-12-21 21:23:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:58,012 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2020-12-21 21:23:58,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 21:23:58,013 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-12-21 21:23:58,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:58,013 INFO L225 Difference]: With dead ends: 87 [2020-12-21 21:23:58,013 INFO L226 Difference]: Without dead ends: 61 [2020-12-21 21:23:58,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:23:58,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-21 21:23:58,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-12-21 21:23:58,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-21 21:23:58,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-12-21 21:23:58,019 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 52 [2020-12-21 21:23:58,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:58,019 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-12-21 21:23:58,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:23:58,019 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-12-21 21:23:58,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-21 21:23:58,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:58,022 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:58,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:23:58,230 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:58,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:58,231 INFO L82 PathProgramCache]: Analyzing trace with hash -599772334, now seen corresponding path program 7 times [2020-12-21 21:23:58,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:58,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190495124] [2020-12-21 21:23:58,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:58,418 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:23:58,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190495124] [2020-12-21 21:23:58,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468793456] [2020-12-21 21:23:58,419 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 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 21:23:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:58,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:23:58,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:23:58,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:58,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:23:58,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836461333] [2020-12-21 21:23:58,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:23:58,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:58,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:23:58,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:23:58,633 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 17 states. [2020-12-21 21:23:58,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:58,708 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2020-12-21 21:23:58,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:23:58,709 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-12-21 21:23:58,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:58,711 INFO L225 Difference]: With dead ends: 90 [2020-12-21 21:23:58,711 INFO L226 Difference]: Without dead ends: 61 [2020-12-21 21:23:58,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 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 21:23:58,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-21 21:23:58,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-12-21 21:23:58,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-21 21:23:58,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-12-21 21:23:58,721 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2020-12-21 21:23:58,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:58,722 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-12-21 21:23:58,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:23:58,722 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-12-21 21:23:58,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 21:23:58,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:58,724 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:58,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:23:58,940 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:58,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:58,941 INFO L82 PathProgramCache]: Analyzing trace with hash -216486768, now seen corresponding path program 8 times [2020-12-21 21:23:58,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:58,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953720274] [2020-12-21 21:23:58,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:23:59,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953720274] [2020-12-21 21:23:59,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661955597] [2020-12-21 21:23:59,143 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 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 21:23:59,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:23:59,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:23:59,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:23:59,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:23:59,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:59,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:23:59,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816562618] [2020-12-21 21:23:59,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:23:59,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:59,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:23:59,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:23:59,334 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 18 states. [2020-12-21 21:23:59,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:59,400 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2020-12-21 21:23:59,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:23:59,401 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-12-21 21:23:59,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:59,402 INFO L225 Difference]: With dead ends: 92 [2020-12-21 21:23:59,402 INFO L226 Difference]: Without dead ends: 63 [2020-12-21 21:23:59,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 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 21:23:59,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-21 21:23:59,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-12-21 21:23:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-21 21:23:59,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-12-21 21:23:59,407 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2020-12-21 21:23:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:59,408 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-12-21 21:23:59,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:23:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-12-21 21:23:59,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 21:23:59,409 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:59,409 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:59,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:23:59,624 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:59,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:59,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1246245298, now seen corresponding path program 9 times [2020-12-21 21:23:59,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:59,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572757145] [2020-12-21 21:23:59,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:23:59,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572757145] [2020-12-21 21:23:59,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873205011] [2020-12-21 21:23:59,869 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 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 21:23:59,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:23:59,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:23:59,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-21 21:23:59,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-21 21:24:00,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:00,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2020-12-21 21:24:00,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563773205] [2020-12-21 21:24:00,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:24:00,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:00,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:24:00,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:24:00,452 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 30 states. [2020-12-21 21:24:01,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:01,177 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2020-12-21 21:24:01,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 21:24:01,178 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 61 [2020-12-21 21:24:01,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:01,179 INFO L225 Difference]: With dead ends: 101 [2020-12-21 21:24:01,179 INFO L226 Difference]: Without dead ends: 72 [2020-12-21 21:24:01,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=518, Invalid=1834, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:24:01,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-21 21:24:01,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2020-12-21 21:24:01,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-21 21:24:01,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-12-21 21:24:01,185 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 61 [2020-12-21 21:24:01,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:01,186 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-12-21 21:24:01,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:24:01,186 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-12-21 21:24:01,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-21 21:24:01,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:01,187 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:01,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:01,402 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:01,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:01,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1714951042, now seen corresponding path program 10 times [2020-12-21 21:24:01,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:01,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352450402] [2020-12-21 21:24:01,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-21 21:24:01,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352450402] [2020-12-21 21:24:01,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740813460] [2020-12-21 21:24:01,660 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 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 21:24:01,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:24:01,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:01,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:24:01,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-21 21:24:01,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:01,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:24:01,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721794240] [2020-12-21 21:24:01,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:24:01,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:01,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:24:01,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:24:01,831 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 20 states. [2020-12-21 21:24:01,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:01,901 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2020-12-21 21:24:01,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:24:01,902 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-12-21 21:24:01,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:01,902 INFO L225 Difference]: With dead ends: 104 [2020-12-21 21:24:01,902 INFO L226 Difference]: Without dead ends: 71 [2020-12-21 21:24:01,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 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 21:24:01,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-21 21:24:01,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-12-21 21:24:01,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-21 21:24:01,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-12-21 21:24:01,908 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2020-12-21 21:24:01,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:01,908 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-12-21 21:24:01,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:24:01,908 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-12-21 21:24:01,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-21 21:24:01,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:01,909 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:02,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:02,123 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:02,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:02,124 INFO L82 PathProgramCache]: Analyzing trace with hash -152004800, now seen corresponding path program 11 times [2020-12-21 21:24:02,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:02,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469243592] [2020-12-21 21:24:02,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-21 21:24:02,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469243592] [2020-12-21 21:24:02,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568848188] [2020-12-21 21:24:02,384 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 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 21:24:12,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-21 21:24:12,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:12,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:24:12,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-21 21:24:12,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:12,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-21 21:24:12,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258964874] [2020-12-21 21:24:12,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:24:12,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:12,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:24:12,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:24:12,976 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 21 states. [2020-12-21 21:24:13,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:13,053 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2020-12-21 21:24:13,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 21:24:13,054 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 69 [2020-12-21 21:24:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:13,055 INFO L225 Difference]: With dead ends: 106 [2020-12-21 21:24:13,055 INFO L226 Difference]: Without dead ends: 73 [2020-12-21 21:24:13,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 69 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 21:24:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-21 21:24:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-12-21 21:24:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-21 21:24:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-12-21 21:24:13,060 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2020-12-21 21:24:13,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:13,060 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-12-21 21:24:13,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:24:13,060 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-12-21 21:24:13,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 21:24:13,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:13,061 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:13,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:13,276 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:13,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:13,277 INFO L82 PathProgramCache]: Analyzing trace with hash 999760766, now seen corresponding path program 12 times [2020-12-21 21:24:13,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:13,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176657845] [2020-12-21 21:24:13,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-21 21:24:13,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176657845] [2020-12-21 21:24:13,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146654302] [2020-12-21 21:24:13,590 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 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 21:24:14,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:24:14,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:14,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:24:14,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-12-21 21:24:14,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:14,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2020-12-21 21:24:14,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607428837] [2020-12-21 21:24:14,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 21:24:14,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:14,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 21:24:14,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:24:14,365 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 28 states. [2020-12-21 21:24:14,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:14,477 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2020-12-21 21:24:14,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 21:24:14,478 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 71 [2020-12-21 21:24:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:14,479 INFO L225 Difference]: With dead ends: 113 [2020-12-21 21:24:14,479 INFO L226 Difference]: Without dead ends: 80 [2020-12-21 21:24:14,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:24:14,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-21 21:24:14,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-12-21 21:24:14,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-21 21:24:14,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-12-21 21:24:14,484 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 71 [2020-12-21 21:24:14,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:14,484 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-12-21 21:24:14,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 21:24:14,485 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-12-21 21:24:14,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-21 21:24:14,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:14,485 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:14,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:24:14,698 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:14,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:14,699 INFO L82 PathProgramCache]: Analyzing trace with hash -42628477, now seen corresponding path program 13 times [2020-12-21 21:24:14,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:14,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224511339] [2020-12-21 21:24:14,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-21 21:24:15,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224511339] [2020-12-21 21:24:15,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2497262] [2020-12-21 21:24:15,037 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 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 21:24:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:15,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:24:15,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-21 21:24:15,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:15,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-21 21:24:15,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425445775] [2020-12-21 21:24:15,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:24:15,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:15,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:24:15,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:24:15,277 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 23 states. [2020-12-21 21:24:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:15,368 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2020-12-21 21:24:15,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:24:15,368 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 76 [2020-12-21 21:24:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:15,369 INFO L225 Difference]: With dead ends: 116 [2020-12-21 21:24:15,369 INFO L226 Difference]: Without dead ends: 80 [2020-12-21 21:24:15,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 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 21:24:15,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-21 21:24:15,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-21 21:24:15,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-21 21:24:15,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-12-21 21:24:15,375 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2020-12-21 21:24:15,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:15,376 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-12-21 21:24:15,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:24:15,376 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-12-21 21:24:15,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-21 21:24:15,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:15,377 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:15,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 21:24:15,591 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:15,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:15,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1625138043, now seen corresponding path program 14 times [2020-12-21 21:24:15,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:15,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137024705] [2020-12-21 21:24:15,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-21 21:24:15,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137024705] [2020-12-21 21:24:15,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204812924] [2020-12-21 21:24:15,909 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 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 21:24:16,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:24:16,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:16,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:24:16,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-21 21:24:16,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:16,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-21 21:24:16,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782692549] [2020-12-21 21:24:16,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:24:16,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:16,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:24:16,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:24:16,118 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 24 states. [2020-12-21 21:24:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:16,205 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2020-12-21 21:24:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:24:16,206 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 78 [2020-12-21 21:24:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:16,206 INFO L225 Difference]: With dead ends: 118 [2020-12-21 21:24:16,206 INFO L226 Difference]: Without dead ends: 82 [2020-12-21 21:24:16,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 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 21:24:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-21 21:24:16,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-12-21 21:24:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-21 21:24:16,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-12-21 21:24:16,211 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2020-12-21 21:24:16,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:16,211 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-12-21 21:24:16,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:24:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-12-21 21:24:16,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-21 21:24:16,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:16,212 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:16,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:16,422 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:16,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:16,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1998408185, now seen corresponding path program 15 times [2020-12-21 21:24:16,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:16,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527504658] [2020-12-21 21:24:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-21 21:24:16,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527504658] [2020-12-21 21:24:16,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438789686] [2020-12-21 21:24:16,789 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 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 21:24:16,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-21 21:24:16,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:16,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:24:16,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2020-12-21 21:24:17,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:17,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10] total 32 [2020-12-21 21:24:17,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749867139] [2020-12-21 21:24:17,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 21:24:17,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:17,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 21:24:17,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:24:17,174 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 32 states. [2020-12-21 21:24:17,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:17,356 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2020-12-21 21:24:17,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 21:24:17,357 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 80 [2020-12-21 21:24:17,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:17,358 INFO L225 Difference]: With dead ends: 125 [2020-12-21 21:24:17,358 INFO L226 Difference]: Without dead ends: 89 [2020-12-21 21:24:17,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:24:17,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-21 21:24:17,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2020-12-21 21:24:17,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-21 21:24:17,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-12-21 21:24:17,363 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 80 [2020-12-21 21:24:17,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:17,363 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-12-21 21:24:17,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 21:24:17,363 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-12-21 21:24:17,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-21 21:24:17,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:17,364 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 8, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:17,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 21:24:17,578 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:17,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:17,578 INFO L82 PathProgramCache]: Analyzing trace with hash -756097898, now seen corresponding path program 16 times [2020-12-21 21:24:17,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:17,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825183102] [2020-12-21 21:24:17,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-21 21:24:18,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825183102] [2020-12-21 21:24:18,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508108000] [2020-12-21 21:24:18,027 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 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 21:24:18,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:24:18,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:24:18,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:24:18,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:24:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2020-12-21 21:24:18,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:24:18,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 11] total 34 [2020-12-21 21:24:18,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84081951] [2020-12-21 21:24:18,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-21 21:24:18,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:24:18,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-21 21:24:18,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=768, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:24:18,416 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 34 states. [2020-12-21 21:24:18,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:24:18,562 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2020-12-21 21:24:18,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 21:24:18,563 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 85 [2020-12-21 21:24:18,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:24:18,564 INFO L225 Difference]: With dead ends: 133 [2020-12-21 21:24:18,564 INFO L226 Difference]: Without dead ends: 94 [2020-12-21 21:24:18,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=354, Invalid=768, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:24:18,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-21 21:24:18,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-12-21 21:24:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-21 21:24:18,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-12-21 21:24:18,571 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 85 [2020-12-21 21:24:18,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:24:18,572 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-12-21 21:24:18,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-21 21:24:18,572 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-12-21 21:24:18,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-21 21:24:18,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:24:18,573 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 9, 9, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:24:18,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:24:18,788 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:24:18,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:24:18,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1148416277, now seen corresponding path program 17 times [2020-12-21 21:24:18,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:24:18,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647535204] [2020-12-21 21:24:18,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:24:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:24:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-12-21 21:24:19,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647535204] [2020-12-21 21:24:19,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586627085] [2020-12-21 21:24:19,190 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 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