/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/loops-crafted-1/Mono1_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:35:42,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:35:42,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:35:42,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 04:35:42,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:35:42,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:35:42,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:35:42,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:35:42,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:35:42,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:35:42,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:35:42,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:35:42,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:35:42,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:35:42,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:35:42,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:35:42,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:35:42,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:35:42,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:35:42,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:35:42,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:35:42,570 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:35:42,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:35:42,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:35:42,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:35:42,574 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:35:42,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:35:42,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:35:42,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:35:42,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:35:42,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:35:42,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:35:42,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:35:42,577 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:35:42,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:35:42,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:35:42,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:35:42,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:35:42,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:35:42,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:35:42,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:35:42,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:35:42,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:35:42,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:35:42,581 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:35:42,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:35:42,582 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:35:43,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:35:43,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:35:43,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:35:43,151 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:35:43,152 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:35:43,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono1_1-2.c [2020-12-22 04:35:43,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f60d80a3c/5788a0aede944c5099fbb7867323ca03/FLAGa6051446a [2020-12-22 04:35:43,861 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:35:43,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono1_1-2.c [2020-12-22 04:35:43,868 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f60d80a3c/5788a0aede944c5099fbb7867323ca03/FLAGa6051446a [2020-12-22 04:35:44,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f60d80a3c/5788a0aede944c5099fbb7867323ca03 [2020-12-22 04:35:44,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:35:44,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:35:44,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:35:44,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:35:44,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:35:44,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:35:44" (1/1) ... [2020-12-22 04:35:44,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f2e21cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:44, skipping insertion in model container [2020-12-22 04:35:44,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:35:44" (1/1) ... [2020-12-22 04:35:44,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:35:44,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:35:44,416 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/loops-crafted-1/Mono1_1-2.c[313,326] [2020-12-22 04:35:44,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:35:44,438 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:35:44,452 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/loops-crafted-1/Mono1_1-2.c[313,326] [2020-12-22 04:35:44,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:35:44,471 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:35:44,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:44 WrapperNode [2020-12-22 04:35:44,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:35:44,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:35:44,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:35:44,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:35:44,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:44" (1/1) ... [2020-12-22 04:35:44,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:44" (1/1) ... [2020-12-22 04:35:44,511 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:35:44,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:35:44,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:35:44,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:35:44,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:44" (1/1) ... [2020-12-22 04:35:44,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:44" (1/1) ... [2020-12-22 04:35:44,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:44" (1/1) ... [2020-12-22 04:35:44,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:44" (1/1) ... [2020-12-22 04:35:44,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:44" (1/1) ... [2020-12-22 04:35:44,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:44" (1/1) ... [2020-12-22 04:35:44,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:44" (1/1) ... [2020-12-22 04:35:44,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:35:44,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:35:44,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:35:44,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:35:44,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:44" (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 [2020-12-22 04:35:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:35:44,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:35:44,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:35:44,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:35:44,885 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:35:44,885 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:35:44,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:35:44 BoogieIcfgContainer [2020-12-22 04:35:44,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:35:44,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:35:44,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:35:44,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:35:44,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:35:44" (1/3) ... [2020-12-22 04:35:44,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f628ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:35:44, skipping insertion in model container [2020-12-22 04:35:44,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:35:44" (2/3) ... [2020-12-22 04:35:44,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f628ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:35:44, skipping insertion in model container [2020-12-22 04:35:44,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:35:44" (3/3) ... [2020-12-22 04:35:44,899 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono1_1-2.c [2020-12-22 04:35:44,907 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:35:44,912 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:35:44,939 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:35:44,972 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:35:44,972 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:35:44,972 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:35:44,972 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:35:44,973 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:35:44,973 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:35:44,973 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:35:44,973 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:35:44,992 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-22 04:35:44,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:35:44,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:44,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:35:44,999 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:45,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:45,007 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2020-12-22 04:35:45,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:45,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94921142] [2020-12-22 04:35:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:45,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94921142] [2020-12-22 04:35:45,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:35:45,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:35:45,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857311484] [2020-12-22 04:35:45,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:35:45,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:45,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:35:45,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:35:45,226 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2020-12-22 04:35:45,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:45,242 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-12-22 04:35:45,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:35:45,243 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-22 04:35:45,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:45,253 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:35:45,253 INFO L226 Difference]: Without dead ends: 8 [2020-12-22 04:35:45,257 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 [2020-12-22 04:35:45,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-22 04:35:45,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-22 04:35:45,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-22 04:35:45,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-12-22 04:35:45,293 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2020-12-22 04:35:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:45,293 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-12-22 04:35:45,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:35:45,294 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-12-22 04:35:45,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:35:45,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:45,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:35:45,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:35:45,295 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:45,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:45,296 INFO L82 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2020-12-22 04:35:45,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:45,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692889962] [2020-12-22 04:35:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:45,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:45,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692889962] [2020-12-22 04:35:45,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:35:45,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:35:45,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545026433] [2020-12-22 04:35:45,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:35:45,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:45,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:35:45,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:35:45,432 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 3 states. [2020-12-22 04:35:45,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:45,508 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2020-12-22 04:35:45,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:35:45,512 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 04:35:45,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:45,513 INFO L225 Difference]: With dead ends: 16 [2020-12-22 04:35:45,513 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:35:45,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:35:45,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:35:45,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 04:35:45,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 04:35:45,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-22 04:35:45,525 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-12-22 04:35:45,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:45,525 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-22 04:35:45,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:35:45,526 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-22 04:35:45,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:35:45,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:45,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:45,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:35:45,527 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:45,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:45,532 INFO L82 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2020-12-22 04:35:45,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:45,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494182333] [2020-12-22 04:35:45,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:45,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494182333] [2020-12-22 04:35:45,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005893821] [2020-12-22 04:35:45,658 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 [2020-12-22 04:35:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:45,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:35:45,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:45,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:45,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:35:45,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124368271] [2020-12-22 04:35:45,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:35:45,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:45,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:35:45,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:35:45,792 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2020-12-22 04:35:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:45,846 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2020-12-22 04:35:45,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:35:45,847 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 04:35:45,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:45,848 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:35:45,848 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:35:45,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:35:45,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:35:45,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-22 04:35:45,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 04:35:45,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-22 04:35:45,853 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-12-22 04:35:45,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:45,853 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-22 04:35:45,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:35:45,853 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-22 04:35:45,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:35:45,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:45,854 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:46,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 04:35:46,069 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:46,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:46,072 INFO L82 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 2 times [2020-12-22 04:35:46,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:46,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946679079] [2020-12-22 04:35:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:46,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946679079] [2020-12-22 04:35:46,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116047752] [2020-12-22 04:35:46,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:46,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:35:46,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:46,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:35:46,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:46,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:46,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:35:46,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992685670] [2020-12-22 04:35:46,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:35:46,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:46,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:35:46,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:35:46,376 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2020-12-22 04:35:46,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:46,436 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2020-12-22 04:35:46,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:35:46,438 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 04:35:46,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:46,439 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:35:46,439 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 04:35:46,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:35:46,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 04:35:46,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 04:35:46,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:35:46,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-22 04:35:46,443 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-12-22 04:35:46,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:46,444 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-22 04:35:46,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:35:46,444 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-22 04:35:46,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:35:46,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:46,445 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:46,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:46,660 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:46,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:46,662 INFO L82 PathProgramCache]: Analyzing trace with hash 570787482, now seen corresponding path program 3 times [2020-12-22 04:35:46,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:46,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832812453] [2020-12-22 04:35:46,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:46,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832812453] [2020-12-22 04:35:46,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636872783] [2020-12-22 04:35:46,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:46,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 04:35:46,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:46,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 04:35:46,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:35:46,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:35:46,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-12-22 04:35:46,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160347860] [2020-12-22 04:35:46,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:35:46,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:46,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:35:46,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:35:46,941 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-12-22 04:35:46,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:46,974 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-12-22 04:35:46,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:35:46,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-22 04:35:46,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:46,976 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:35:46,976 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 04:35:46,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:35:46,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 04:35:46,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-22 04:35:46,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 04:35:46,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-22 04:35:46,984 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-12-22 04:35:46,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:46,985 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-22 04:35:46,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:35:46,986 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-22 04:35:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:35:46,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:46,987 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:47,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:47,202 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:47,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:47,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1176853889, now seen corresponding path program 1 times [2020-12-22 04:35:47,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:47,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600408742] [2020-12-22 04:35:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:47,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600408742] [2020-12-22 04:35:47,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894469721] [2020-12-22 04:35:47,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 04:35:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:47,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:35:47,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:47,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:47,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:35:47,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059509420] [2020-12-22 04:35:47,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:35:47,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:47,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:35:47,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:35:47,791 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-12-22 04:35:47,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:47,912 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-12-22 04:35:47,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:35:47,923 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-22 04:35:47,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:47,924 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:35:47,924 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 04:35:47,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:35:47,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 04:35:47,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-22 04:35:47,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:35:47,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-22 04:35:47,937 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-12-22 04:35:47,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:47,940 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-22 04:35:47,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:35:47,940 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-22 04:35:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:35:47,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:47,942 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:48,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:48,157 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:48,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:48,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1191961250, now seen corresponding path program 2 times [2020-12-22 04:35:48,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:48,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683079442] [2020-12-22 04:35:48,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:48,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683079442] [2020-12-22 04:35:48,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136439612] [2020-12-22 04:35:48,339 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 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 [2020-12-22 04:35:48,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:35:48,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:48,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:35:48,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:48,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:48,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2020-12-22 04:35:48,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812783644] [2020-12-22 04:35:48,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:35:48,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:48,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:35:48,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:35:48,518 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2020-12-22 04:35:48,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:48,662 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-12-22 04:35:48,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:35:48,663 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-22 04:35:48,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:48,664 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:35:48,664 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 04:35:48,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:35:48,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 04:35:48,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 04:35:48,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:35:48,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-22 04:35:48,670 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-12-22 04:35:48,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:48,670 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-22 04:35:48,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:35:48,670 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-22 04:35:48,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:35:48,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:48,671 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:48,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 04:35:48,885 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:48,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:48,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1290642949, now seen corresponding path program 3 times [2020-12-22 04:35:48,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:48,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634695452] [2020-12-22 04:35:48,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:49,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634695452] [2020-12-22 04:35:49,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241634647] [2020-12-22 04:35:49,084 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 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 [2020-12-22 04:35:49,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:35:49,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:49,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:35:49,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 04:35:49,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:49,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2020-12-22 04:35:49,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448457774] [2020-12-22 04:35:49,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:35:49,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:49,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:35:49,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:35:49,312 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2020-12-22 04:35:49,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:49,514 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-12-22 04:35:49,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:35:49,515 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-22 04:35:49,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:49,516 INFO L225 Difference]: With dead ends: 31 [2020-12-22 04:35:49,516 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:35:49,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:35:49,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:35:49,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 04:35:49,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 04:35:49,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-22 04:35:49,526 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-12-22 04:35:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:49,526 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-22 04:35:49,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:35:49,526 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-22 04:35:49,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:35:49,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:49,527 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:49,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:49,729 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:49,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:49,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1175196403, now seen corresponding path program 4 times [2020-12-22 04:35:49,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:49,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825386316] [2020-12-22 04:35:49,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:35:49,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825386316] [2020-12-22 04:35:49,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843454877] [2020-12-22 04:35:49,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:35:50,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:35:50,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:50,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:35:50,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:35:50,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:50,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:35:50,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851478411] [2020-12-22 04:35:50,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:35:50,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:50,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:35:50,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:35:50,151 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2020-12-22 04:35:50,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:50,273 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-12-22 04:35:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:35:50,274 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-22 04:35:50,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:50,275 INFO L225 Difference]: With dead ends: 36 [2020-12-22 04:35:50,275 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 04:35:50,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:35:50,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 04:35:50,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-22 04:35:50,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 04:35:50,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-12-22 04:35:50,282 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2020-12-22 04:35:50,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:50,283 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-12-22 04:35:50,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:35:50,283 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-12-22 04:35:50,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:35:50,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:50,284 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:50,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:50,498 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:50,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:50,499 INFO L82 PathProgramCache]: Analyzing trace with hash -415213008, now seen corresponding path program 5 times [2020-12-22 04:35:50,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:50,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551365223] [2020-12-22 04:35:50,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:35:50,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551365223] [2020-12-22 04:35:50,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494650839] [2020-12-22 04:35:50,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:35:50,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 04:35:50,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:50,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:35:50,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:35:51,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:51,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:35:51,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543482355] [2020-12-22 04:35:51,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:35:51,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:51,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:35:51,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:35:51,106 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 11 states. [2020-12-22 04:35:51,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:51,254 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-12-22 04:35:51,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:35:51,255 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-12-22 04:35:51,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:51,256 INFO L225 Difference]: With dead ends: 38 [2020-12-22 04:35:51,256 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:35:51,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:35:51,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:35:51,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 04:35:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 04:35:51,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-22 04:35:51,270 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2020-12-22 04:35:51,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:51,270 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-22 04:35:51,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:35:51,270 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-22 04:35:51,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:35:51,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:51,272 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:51,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:35:51,481 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:51,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:51,482 INFO L82 PathProgramCache]: Analyzing trace with hash -215610733, now seen corresponding path program 6 times [2020-12-22 04:35:51,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:51,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206557879] [2020-12-22 04:35:51,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:35:51,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206557879] [2020-12-22 04:35:51,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728491461] [2020-12-22 04:35:51,742 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 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 [2020-12-22 04:35:51,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-22 04:35:51,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:51,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:35:51,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:52,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:52,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 14 [2020-12-22 04:35:52,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388970874] [2020-12-22 04:35:52,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:35:52,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:52,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:35:52,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:35:52,019 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2020-12-22 04:35:52,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:52,193 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-12-22 04:35:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:35:52,194 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-12-22 04:35:52,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:52,194 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:35:52,195 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 04:35:52,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:35:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 04:35:52,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-22 04:35:52,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 04:35:52,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-22 04:35:52,201 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2020-12-22 04:35:52,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:52,201 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-22 04:35:52,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:35:52,201 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-22 04:35:52,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:35:52,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:52,202 INFO L422 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:52,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:52,407 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:52,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:52,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1671352778, now seen corresponding path program 7 times [2020-12-22 04:35:52,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:52,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271537856] [2020-12-22 04:35:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:35:52,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271537856] [2020-12-22 04:35:52,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280057354] [2020-12-22 04:35:52,665 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 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 [2020-12-22 04:35:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:52,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:35:52,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:35:52,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:52,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:35:52,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720973926] [2020-12-22 04:35:52,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:35:52,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:52,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:35:52,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:35:52,841 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2020-12-22 04:35:53,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:53,026 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-12-22 04:35:53,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:35:53,026 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-12-22 04:35:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:53,027 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:35:53,027 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:35:53,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:35:53,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:35:53,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-22 04:35:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 04:35:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-22 04:35:53,033 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2020-12-22 04:35:53,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:53,034 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-22 04:35:53,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:35:53,034 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-22 04:35:53,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:35:53,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:53,035 INFO L422 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:53,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:53,250 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:53,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:53,251 INFO L82 PathProgramCache]: Analyzing trace with hash -480119527, now seen corresponding path program 8 times [2020-12-22 04:35:53,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:53,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429829652] [2020-12-22 04:35:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:35:53,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429829652] [2020-12-22 04:35:53,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690903289] [2020-12-22 04:35:53,505 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 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 [2020-12-22 04:35:53,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:35:53,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:53,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:35:53,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:35:53,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:53,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 16 [2020-12-22 04:35:53,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636276188] [2020-12-22 04:35:53,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:35:53,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:53,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:35:53,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:35:53,671 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2020-12-22 04:35:53,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:53,924 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-12-22 04:35:53,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:35:53,924 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-22 04:35:53,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:53,928 INFO L225 Difference]: With dead ends: 44 [2020-12-22 04:35:53,928 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 04:35:53,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:35:53,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 04:35:53,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-22 04:35:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 04:35:53,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-12-22 04:35:53,948 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 30 [2020-12-22 04:35:53,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:53,949 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-12-22 04:35:53,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:35:53,950 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-12-22 04:35:53,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:35:53,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:53,953 INFO L422 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:54,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:35:54,169 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:54,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:54,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1833733948, now seen corresponding path program 9 times [2020-12-22 04:35:54,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:54,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815015632] [2020-12-22 04:35:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:35:54,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815015632] [2020-12-22 04:35:54,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223815791] [2020-12-22 04:35:54,426 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 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 [2020-12-22 04:35:54,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 04:35:54,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:54,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:35:54,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 4 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-22 04:35:54,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:54,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2020-12-22 04:35:54,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975512002] [2020-12-22 04:35:54,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:35:54,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:54,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:35:54,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:35:54,659 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2020-12-22 04:35:55,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:55,125 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-12-22 04:35:55,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:35:55,125 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-12-22 04:35:55,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:55,126 INFO L225 Difference]: With dead ends: 50 [2020-12-22 04:35:55,126 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:35:55,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:35:55,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:35:55,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-12-22 04:35:55,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:35:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-22 04:35:55,135 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 32 [2020-12-22 04:35:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:55,138 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-22 04:35:55,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:35:55,139 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-22 04:35:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:35:55,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:55,142 INFO L422 BasicCegarLoop]: trace histogram [15, 12, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:55,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:35:55,358 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:55,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:55,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1350359876, now seen corresponding path program 10 times [2020-12-22 04:35:55,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:55,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987909369] [2020-12-22 04:35:55,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 65 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:35:55,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987909369] [2020-12-22 04:35:55,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778748776] [2020-12-22 04:35:55,661 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 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 [2020-12-22 04:35:55,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:35:55,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:55,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:35:55,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 65 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:35:55,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:55,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 04:35:55,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537067899] [2020-12-22 04:35:55,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:35:55,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:55,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:35:55,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:35:55,827 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 16 states. [2020-12-22 04:35:56,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:56,111 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-12-22 04:35:56,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:35:56,112 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-12-22 04:35:56,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:56,113 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:35:56,113 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:35:56,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:35:56,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:35:56,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-22 04:35:56,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 04:35:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-12-22 04:35:56,121 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 36 [2020-12-22 04:35:56,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:56,122 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-12-22 04:35:56,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:35:56,122 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-12-22 04:35:56,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:35:56,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:56,123 INFO L422 BasicCegarLoop]: trace histogram [16, 13, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:56,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:35:56,338 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:56,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:56,339 INFO L82 PathProgramCache]: Analyzing trace with hash -33157337, now seen corresponding path program 11 times [2020-12-22 04:35:56,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:56,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419110376] [2020-12-22 04:35:56,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:56,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:56,634 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:35:56,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419110376] [2020-12-22 04:35:56,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898589453] [2020-12-22 04:35:56,635 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 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 [2020-12-22 04:35:56,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-22 04:35:56,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:56,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:35:56,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:35:57,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:57,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:35:57,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929405559] [2020-12-22 04:35:57,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:35:57,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:57,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:35:57,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:35:57,291 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 17 states. [2020-12-22 04:35:57,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:57,585 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-12-22 04:35:57,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:35:57,586 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-12-22 04:35:57,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:57,586 INFO L225 Difference]: With dead ends: 54 [2020-12-22 04:35:57,587 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 04:35:57,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 13 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:35:57,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 04:35:57,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-22 04:35:57,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 04:35:57,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-12-22 04:35:57,593 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 38 [2020-12-22 04:35:57,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:57,593 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-12-22 04:35:57,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:35:57,594 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-12-22 04:35:57,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:35:57,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:57,594 INFO L422 BasicCegarLoop]: trace histogram [17, 14, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:57,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:35:57,799 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:57,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:57,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1846662730, now seen corresponding path program 12 times [2020-12-22 04:35:57,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:57,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566418383] [2020-12-22 04:35:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:35:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:35:58,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566418383] [2020-12-22 04:35:58,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773916317] [2020-12-22 04:35:58,097 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 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 [2020-12-22 04:35:58,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-22 04:35:58,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:35:58,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 04:35:58,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:35:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 98 proven. 9 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-22 04:35:58,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:35:58,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 21 [2020-12-22 04:35:58,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417546069] [2020-12-22 04:35:58,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:35:58,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:35:58,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:35:58,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:35:58,662 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2020-12-22 04:35:59,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:35:59,449 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-12-22 04:35:59,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:35:59,450 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-12-22 04:35:59,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:35:59,451 INFO L225 Difference]: With dead ends: 60 [2020-12-22 04:35:59,451 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:35:59,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:35:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:35:59,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-12-22 04:35:59,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 04:35:59,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-22 04:35:59,461 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 40 [2020-12-22 04:35:59,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:35:59,463 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-22 04:35:59,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:35:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-22 04:35:59,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:35:59,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:35:59,471 INFO L422 BasicCegarLoop]: trace histogram [19, 15, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:35:59,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:35:59,677 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:35:59,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:35:59,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1664138286, now seen corresponding path program 13 times [2020-12-22 04:35:59,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:35:59,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518151945] [2020-12-22 04:35:59,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:35:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:36:00,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518151945] [2020-12-22 04:36:00,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609772634] [2020-12-22 04:36:00,021 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 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 [2020-12-22 04:36:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:00,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:36:00,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:36:00,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:00,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:36:00,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24800463] [2020-12-22 04:36:00,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:36:00,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:00,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:36:00,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:36:00,204 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 19 states. [2020-12-22 04:36:00,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:00,631 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-12-22 04:36:00,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:36:00,632 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-12-22 04:36:00,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:00,632 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:36:00,632 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:36:00,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:36:00,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:36:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-22 04:36:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 04:36:00,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-12-22 04:36:00,645 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 44 [2020-12-22 04:36:00,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:00,645 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-12-22 04:36:00,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:36:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-12-22 04:36:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:36:00,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:00,646 INFO L422 BasicCegarLoop]: trace histogram [20, 16, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:00,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:36:00,862 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:00,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:00,863 INFO L82 PathProgramCache]: Analyzing trace with hash -870062923, now seen corresponding path program 14 times [2020-12-22 04:36:00,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:00,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998471434] [2020-12-22 04:36:00,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:36:01,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998471434] [2020-12-22 04:36:01,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843418920] [2020-12-22 04:36:01,255 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 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 [2020-12-22 04:36:01,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:36:01,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:01,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:36:01,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:36:01,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:01,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 24 [2020-12-22 04:36:01,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102445537] [2020-12-22 04:36:01,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:36:01,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:01,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:36:01,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:36:01,549 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2020-12-22 04:36:02,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:02,155 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-12-22 04:36:02,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:36:02,156 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-12-22 04:36:02,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:02,156 INFO L225 Difference]: With dead ends: 64 [2020-12-22 04:36:02,156 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 04:36:02,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:36:02,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 04:36:02,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-22 04:36:02,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 04:36:02,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-12-22 04:36:02,163 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2020-12-22 04:36:02,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:02,163 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-12-22 04:36:02,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:36:02,163 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-12-22 04:36:02,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:36:02,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:02,164 INFO L422 BasicCegarLoop]: trace histogram [21, 17, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:02,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:02,374 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:02,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:02,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2027149528, now seen corresponding path program 15 times [2020-12-22 04:36:02,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:02,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771966153] [2020-12-22 04:36:02,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:36:02,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771966153] [2020-12-22 04:36:02,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817320094] [2020-12-22 04:36:02,816 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 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 [2020-12-22 04:36:02,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 04:36:02,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:02,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:36:02,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 153 proven. 16 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 04:36:03,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:03,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 7] total 25 [2020-12-22 04:36:03,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185070206] [2020-12-22 04:36:03,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:36:03,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:03,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:36:03,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:36:03,320 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2020-12-22 04:36:04,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:04,527 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-12-22 04:36:04,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:36:04,527 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-12-22 04:36:04,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:04,528 INFO L225 Difference]: With dead ends: 70 [2020-12-22 04:36:04,528 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:36:04,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:36:04,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:36:04,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-12-22 04:36:04,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 04:36:04,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-12-22 04:36:04,534 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 48 [2020-12-22 04:36:04,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:04,534 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-12-22 04:36:04,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:36:04,534 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-12-22 04:36:04,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:36:04,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:04,535 INFO L422 BasicCegarLoop]: trace histogram [23, 18, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:04,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:04,736 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:04,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:04,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1008695328, now seen corresponding path program 16 times [2020-12-22 04:36:04,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:04,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80072291] [2020-12-22 04:36:04,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 171 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:36:05,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80072291] [2020-12-22 04:36:05,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829528123] [2020-12-22 04:36:05,176 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 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 [2020-12-22 04:36:05,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:36:05,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:05,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 04:36:05,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 171 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:36:05,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:05,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:36:05,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007091487] [2020-12-22 04:36:05,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:36:05,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:05,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:36:05,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:36:05,377 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 22 states. [2020-12-22 04:36:06,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:06,010 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-12-22 04:36:06,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:36:06,011 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-12-22 04:36:06,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:06,011 INFO L225 Difference]: With dead ends: 72 [2020-12-22 04:36:06,012 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:36:06,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:36:06,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:36:06,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-22 04:36:06,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 04:36:06,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-12-22 04:36:06,018 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2020-12-22 04:36:06,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:06,019 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-12-22 04:36:06,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:36:06,019 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-12-22 04:36:06,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:36:06,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:06,020 INFO L422 BasicCegarLoop]: trace histogram [24, 19, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:06,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:06,234 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:06,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:06,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1656515133, now seen corresponding path program 17 times [2020-12-22 04:36:06,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:06,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734082658] [2020-12-22 04:36:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:36:06,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734082658] [2020-12-22 04:36:06,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312697806] [2020-12-22 04:36:06,745 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 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 [2020-12-22 04:36:07,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-22 04:36:07,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:07,782 WARN L261 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 04:36:07,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:36:08,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:08,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:36:08,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738968974] [2020-12-22 04:36:08,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:36:08,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:08,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:36:08,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:36:08,364 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 23 states. [2020-12-22 04:36:09,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:09,047 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-12-22 04:36:09,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:36:09,048 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-12-22 04:36:09,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:09,049 INFO L225 Difference]: With dead ends: 74 [2020-12-22 04:36:09,049 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 04:36:09,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 21 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:36:09,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 04:36:09,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-22 04:36:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 04:36:09,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-12-22 04:36:09,055 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 54 [2020-12-22 04:36:09,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:09,056 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-12-22 04:36:09,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:36:09,056 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-12-22 04:36:09,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 04:36:09,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:09,057 INFO L422 BasicCegarLoop]: trace histogram [25, 20, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:09,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:36:09,266 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:09,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:09,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1441089818, now seen corresponding path program 18 times [2020-12-22 04:36:09,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:09,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640159893] [2020-12-22 04:36:09,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:36:09,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640159893] [2020-12-22 04:36:09,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977381408] [2020-12-22 04:36:09,777 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 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 [2020-12-22 04:36:10,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-22 04:36:10,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:10,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:36:10,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 220 proven. 25 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-12-22 04:36:11,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:11,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2020-12-22 04:36:11,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468838933] [2020-12-22 04:36:11,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:36:11,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:11,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:36:11,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:36:11,446 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 29 states. [2020-12-22 04:36:13,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:13,610 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-12-22 04:36:13,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:36:13,611 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2020-12-22 04:36:13,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:13,612 INFO L225 Difference]: With dead ends: 80 [2020-12-22 04:36:13,612 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 04:36:13,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:36:13,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 04:36:13,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-12-22 04:36:13,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 04:36:13,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-12-22 04:36:13,618 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 56 [2020-12-22 04:36:13,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:13,618 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-12-22 04:36:13,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:36:13,619 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-12-22 04:36:13,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 04:36:13,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:13,619 INFO L422 BasicCegarLoop]: trace histogram [27, 21, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:13,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:36:13,824 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:13,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:13,825 INFO L82 PathProgramCache]: Analyzing trace with hash 766560110, now seen corresponding path program 19 times [2020-12-22 04:36:13,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:13,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57858097] [2020-12-22 04:36:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 242 proven. 462 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:36:14,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57858097] [2020-12-22 04:36:14,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024618067] [2020-12-22 04:36:14,400 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 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 [2020-12-22 04:36:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:14,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:36:14,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 242 proven. 462 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:36:14,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:14,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:36:14,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557109316] [2020-12-22 04:36:14,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:36:14,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:14,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:36:14,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:36:14,657 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 25 states. [2020-12-22 04:36:15,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:15,444 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-12-22 04:36:15,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:36:15,444 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-12-22 04:36:15,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:15,445 INFO L225 Difference]: With dead ends: 82 [2020-12-22 04:36:15,445 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 04:36:15,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:36:15,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 04:36:15,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-22 04:36:15,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 04:36:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-12-22 04:36:15,452 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 60 [2020-12-22 04:36:15,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:15,452 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-12-22 04:36:15,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:36:15,452 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-12-22 04:36:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 04:36:15,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:15,453 INFO L422 BasicCegarLoop]: trace histogram [28, 22, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:15,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:15,668 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:15,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:15,669 INFO L82 PathProgramCache]: Analyzing trace with hash -429571503, now seen corresponding path program 20 times [2020-12-22 04:36:15,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:15,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019924429] [2020-12-22 04:36:15,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:36:16,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019924429] [2020-12-22 04:36:16,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217594631] [2020-12-22 04:36:16,269 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 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 [2020-12-22 04:36:16,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:36:16,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:16,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 04:36:16,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:36:16,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:16,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31] total 32 [2020-12-22 04:36:16,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313612287] [2020-12-22 04:36:16,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:36:16,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:16,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:36:16,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:36:16,747 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2020-12-22 04:36:17,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:17,775 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2020-12-22 04:36:17,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:36:17,775 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2020-12-22 04:36:17,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:17,776 INFO L225 Difference]: With dead ends: 84 [2020-12-22 04:36:17,777 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 04:36:17,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:36:17,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 04:36:17,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-22 04:36:17,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 04:36:17,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-12-22 04:36:17,782 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2020-12-22 04:36:17,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:17,783 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-12-22 04:36:17,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:36:17,783 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-12-22 04:36:17,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 04:36:17,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:17,784 INFO L422 BasicCegarLoop]: trace histogram [29, 23, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:17,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 04:36:17,997 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:17,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:17,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1139183732, now seen corresponding path program 21 times [2020-12-22 04:36:17,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:17,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932425147] [2020-12-22 04:36:17,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:36:18,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932425147] [2020-12-22 04:36:18,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816657735] [2020-12-22 04:36:18,663 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 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 [2020-12-22 04:36:18,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-22 04:36:18,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:18,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:36:18,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 299 proven. 36 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-12-22 04:36:19,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:19,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2020-12-22 04:36:19,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078864217] [2020-12-22 04:36:19,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:36:19,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:19,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:36:19,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:36:19,573 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2020-12-22 04:36:22,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:22,461 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-12-22 04:36:22,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:36:22,462 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2020-12-22 04:36:22,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:22,463 INFO L225 Difference]: With dead ends: 90 [2020-12-22 04:36:22,463 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 04:36:22,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=219, Invalid=1341, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:36:22,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 04:36:22,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-12-22 04:36:22,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 04:36:22,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-12-22 04:36:22,469 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 64 [2020-12-22 04:36:22,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:22,470 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-12-22 04:36:22,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:36:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-12-22 04:36:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 04:36:22,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:22,471 INFO L422 BasicCegarLoop]: trace histogram [31, 24, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:22,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:22,683 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:22,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:22,683 INFO L82 PathProgramCache]: Analyzing trace with hash -373808516, now seen corresponding path program 22 times [2020-12-22 04:36:22,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:22,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303729586] [2020-12-22 04:36:22,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 325 proven. 600 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 04:36:23,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303729586] [2020-12-22 04:36:23,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980074229] [2020-12-22 04:36:23,451 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:23,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:36:23,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:23,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 04:36:23,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 325 proven. 600 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 04:36:23,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:23,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 04:36:23,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877829017] [2020-12-22 04:36:23,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:36:23,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:23,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:36:23,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:36:23,719 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 28 states. [2020-12-22 04:36:24,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:24,776 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-12-22 04:36:24,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:36:24,777 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 68 [2020-12-22 04:36:24,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:24,778 INFO L225 Difference]: With dead ends: 92 [2020-12-22 04:36:24,779 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 04:36:24,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:36:24,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 04:36:24,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-22 04:36:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 04:36:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-12-22 04:36:24,784 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 68 [2020-12-22 04:36:24,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:24,785 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-12-22 04:36:24,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:36:24,785 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-12-22 04:36:24,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 04:36:24,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:24,785 INFO L422 BasicCegarLoop]: trace histogram [32, 25, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:24,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:36:24,999 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:24,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:24,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1006564769, now seen corresponding path program 23 times [2020-12-22 04:36:25,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:25,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765850578] [2020-12-22 04:36:25,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 04:36:25,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765850578] [2020-12-22 04:36:25,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980528067] [2020-12-22 04:36:25,716 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:35,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2020-12-22 04:36:35,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:35,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 04:36:35,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 252 proven. 756 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:36:35,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:35,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 31 [2020-12-22 04:36:35,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947160862] [2020-12-22 04:36:35,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:36:35,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:35,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:36:35,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:36:35,658 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 31 states. [2020-12-22 04:36:36,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:36,803 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2020-12-22 04:36:36,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:36:36,804 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-12-22 04:36:36,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:36,805 INFO L225 Difference]: With dead ends: 94 [2020-12-22 04:36:36,805 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 04:36:36,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:36:36,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 04:36:36,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-22 04:36:36,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 04:36:36,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-12-22 04:36:36,812 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2020-12-22 04:36:36,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:36,812 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-12-22 04:36:36,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:36:36,812 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-12-22 04:36:36,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 04:36:36,813 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:36,813 INFO L422 BasicCegarLoop]: trace histogram [33, 26, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:37,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:36:37,018 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:37,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:37,019 INFO L82 PathProgramCache]: Analyzing trace with hash 800032130, now seen corresponding path program 24 times [2020-12-22 04:36:37,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:37,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782203123] [2020-12-22 04:36:37,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 04:36:37,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782203123] [2020-12-22 04:36:37,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024801904] [2020-12-22 04:36:37,862 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:39,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 04:36:39,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:39,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:36:39,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 390 proven. 49 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-12-22 04:36:40,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:40,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 10] total 37 [2020-12-22 04:36:40,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630413377] [2020-12-22 04:36:40,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:36:40,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:40,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:36:40,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:36:40,605 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 37 states. [2020-12-22 04:36:43,482 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2020-12-22 04:36:45,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:45,409 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2020-12-22 04:36:45,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:36:45,410 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2020-12-22 04:36:45,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:45,410 INFO L225 Difference]: With dead ends: 100 [2020-12-22 04:36:45,410 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 04:36:45,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=313, Invalid=1667, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:36:45,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 04:36:45,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-12-22 04:36:45,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 04:36:45,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-12-22 04:36:45,417 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 72 [2020-12-22 04:36:45,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:45,418 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-12-22 04:36:45,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:36:45,418 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-12-22 04:36:45,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 04:36:45,418 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:45,418 INFO L422 BasicCegarLoop]: trace histogram [35, 27, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:45,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:36:45,623 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:45,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:45,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1327056630, now seen corresponding path program 25 times [2020-12-22 04:36:45,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:45,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697630714] [2020-12-22 04:36:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 420 proven. 756 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:36:46,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697630714] [2020-12-22 04:36:46,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851502490] [2020-12-22 04:36:46,506 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:46,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 04:36:46,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 420 proven. 756 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:36:46,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:46,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 04:36:46,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782980758] [2020-12-22 04:36:46,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:36:46,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:46,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:36:46,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:36:46,798 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 31 states. [2020-12-22 04:36:48,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:48,057 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2020-12-22 04:36:48,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:36:48,058 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 76 [2020-12-22 04:36:48,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:48,059 INFO L225 Difference]: With dead ends: 102 [2020-12-22 04:36:48,059 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 04:36:48,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:36:48,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 04:36:48,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-22 04:36:48,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 04:36:48,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-12-22 04:36:48,065 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 76 [2020-12-22 04:36:48,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:48,066 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-12-22 04:36:48,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:36:48,066 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-12-22 04:36:48,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 04:36:48,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:48,067 INFO L422 BasicCegarLoop]: trace histogram [36, 28, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:48,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:48,282 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:48,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:48,282 INFO L82 PathProgramCache]: Analyzing trace with hash -66646547, now seen corresponding path program 26 times [2020-12-22 04:36:48,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:48,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509261389] [2020-12-22 04:36:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:36:49,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509261389] [2020-12-22 04:36:49,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587054682] [2020-12-22 04:36:49,186 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:49,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:36:49,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:49,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-22 04:36:49,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:36:49,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:49,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 39] total 40 [2020-12-22 04:36:49,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447844567] [2020-12-22 04:36:49,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:36:49,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:49,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:36:49,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:36:49,818 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2020-12-22 04:36:51,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:51,583 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2020-12-22 04:36:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:36:51,584 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2020-12-22 04:36:51,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:51,585 INFO L225 Difference]: With dead ends: 104 [2020-12-22 04:36:51,585 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 04:36:51,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:36:51,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 04:36:51,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-22 04:36:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 04:36:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-12-22 04:36:51,593 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 78 [2020-12-22 04:36:51,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:51,593 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-12-22 04:36:51,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:36:51,593 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-12-22 04:36:51,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 04:36:51,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:51,594 INFO L422 BasicCegarLoop]: trace histogram [37, 29, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:51,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 04:36:51,797 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:51,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:51,797 INFO L82 PathProgramCache]: Analyzing trace with hash 6665744, now seen corresponding path program 27 times [2020-12-22 04:36:51,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:51,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002708075] [2020-12-22 04:36:51,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:36:52,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002708075] [2020-12-22 04:36:52,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361339198] [2020-12-22 04:36:52,760 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:52,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-22 04:36:52,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:52,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:36:53,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 357 proven. 592 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-12-22 04:36:54,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:54,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 19] total 41 [2020-12-22 04:36:54,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148230223] [2020-12-22 04:36:54,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:36:54,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:54,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:36:54,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1504, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:36:54,613 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2020-12-22 04:36:57,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:36:57,605 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2020-12-22 04:36:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:36:57,606 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2020-12-22 04:36:57,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:36:57,606 INFO L225 Difference]: With dead ends: 108 [2020-12-22 04:36:57,606 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 04:36:57,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:36:57,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 04:36:57,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-12-22 04:36:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 04:36:57,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-12-22 04:36:57,612 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 80 [2020-12-22 04:36:57,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:36:57,612 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-12-22 04:36:57,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:36:57,613 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-12-22 04:36:57,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 04:36:57,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:36:57,613 INFO L422 BasicCegarLoop]: trace histogram [39, 30, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:36:57,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:57,817 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:36:57,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:36:57,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1738844952, now seen corresponding path program 28 times [2020-12-22 04:36:57,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:36:57,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98742220] [2020-12-22 04:36:57,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:36:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:36:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 527 proven. 930 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 04:36:58,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98742220] [2020-12-22 04:36:58,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121895469] [2020-12-22 04:36:58,783 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:36:58,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:36:58,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:36:58,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-22 04:36:58,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:36:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 527 proven. 930 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 04:36:59,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:36:59,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 04:36:59,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156704666] [2020-12-22 04:36:59,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:36:59,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:36:59,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:36:59,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:36:59,075 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 34 states. [2020-12-22 04:37:00,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:37:00,540 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2020-12-22 04:37:00,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:37:00,541 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 84 [2020-12-22 04:37:00,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:37:00,542 INFO L225 Difference]: With dead ends: 112 [2020-12-22 04:37:00,542 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 04:37:00,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:37:00,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 04:37:00,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-12-22 04:37:00,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 04:37:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-12-22 04:37:00,550 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 84 [2020-12-22 04:37:00,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:37:00,550 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-12-22 04:37:00,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:37:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-12-22 04:37:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 04:37:00,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:37:00,551 INFO L422 BasicCegarLoop]: trace histogram [40, 31, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:37:00,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 04:37:00,766 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:37:00,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:37:00,767 INFO L82 PathProgramCache]: Analyzing trace with hash 2145348859, now seen corresponding path program 29 times [2020-12-22 04:37:00,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:37:00,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769116578] [2020-12-22 04:37:00,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:37:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:37:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 04:37:01,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769116578] [2020-12-22 04:37:01,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675511544] [2020-12-22 04:37:01,826 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:37:21,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2020-12-22 04:37:21,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:37:21,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-22 04:37:21,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:37:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 190 proven. 1406 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:37:22,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:37:22,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 40] total 41 [2020-12-22 04:37:22,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78564791] [2020-12-22 04:37:22,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:37:22,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:37:22,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:37:22,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1529, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:37:22,542 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 41 states. [2020-12-22 04:37:24,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:37:24,505 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2020-12-22 04:37:24,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:37:24,506 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-12-22 04:37:24,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:37:24,507 INFO L225 Difference]: With dead ends: 114 [2020-12-22 04:37:24,507 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 04:37:24,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=1529, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:37:24,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 04:37:24,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-12-22 04:37:24,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 04:37:24,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-12-22 04:37:24,514 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 86 [2020-12-22 04:37:24,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:37:24,514 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-12-22 04:37:24,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:37:24,515 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-12-22 04:37:24,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 04:37:24,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:37:24,515 INFO L422 BasicCegarLoop]: trace histogram [41, 32, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:37:24,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 04:37:24,721 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:37:24,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:37:24,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1953579550, now seen corresponding path program 30 times [2020-12-22 04:37:24,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:37:24,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990800680] [2020-12-22 04:37:24,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:37:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:37:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 04:37:25,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990800680] [2020-12-22 04:37:25,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238326513] [2020-12-22 04:37:25,820 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:37:31,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2020-12-22 04:37:31,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:37:31,740 WARN L261 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 120 conjunts are in the unsatisfiable core [2020-12-22 04:37:31,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:37:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 647 proven. 960 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-12-22 04:37:38,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:37:38,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 61 [2020-12-22 04:37:38,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372669443] [2020-12-22 04:37:38,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-22 04:37:38,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:37:38,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-22 04:37:38,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=2982, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 04:37:38,372 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 61 states. [2020-12-22 04:37:42,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:37:42,324 INFO L93 Difference]: Finished difference Result 150 states and 173 transitions. [2020-12-22 04:37:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-22 04:37:42,325 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 88 [2020-12-22 04:37:42,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:37:42,328 INFO L225 Difference]: With dead ends: 150 [2020-12-22 04:37:42,328 INFO L226 Difference]: Without dead ends: 126 [2020-12-22 04:37:42,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 18 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=713, Invalid=3069, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 04:37:42,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-22 04:37:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2020-12-22 04:37:42,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 04:37:42,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-12-22 04:37:42,338 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 88 [2020-12-22 04:37:42,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:37:42,338 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-12-22 04:37:42,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-22 04:37:42,339 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-12-22 04:37:42,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 04:37:42,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:37:42,340 INFO L422 BasicCegarLoop]: trace histogram [43, 33, 10, 1, 1, 1, 1, 1, 1] [2020-12-22 04:37:42,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:37:42,544 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:37:42,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:37:42,545 INFO L82 PathProgramCache]: Analyzing trace with hash 533862566, now seen corresponding path program 31 times [2020-12-22 04:37:42,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:37:42,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484336991] [2020-12-22 04:37:42,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:37:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:37:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 646 proven. 1122 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 04:37:43,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484336991] [2020-12-22 04:37:43,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332657372] [2020-12-22 04:37:43,783 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:37:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:37:43,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-22 04:37:43,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:37:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 646 proven. 1122 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 04:37:44,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:37:44,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 04:37:44,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151703510] [2020-12-22 04:37:44,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:37:44,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:37:44,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:37:44,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:37:44,150 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 37 states. [2020-12-22 04:37:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:37:46,033 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2020-12-22 04:37:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:37:46,034 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 92 [2020-12-22 04:37:46,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:37:46,035 INFO L225 Difference]: With dead ends: 122 [2020-12-22 04:37:46,035 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 04:37:46,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:37:46,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 04:37:46,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-12-22 04:37:46,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 04:37:46,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-12-22 04:37:46,044 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 92 [2020-12-22 04:37:46,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:37:46,044 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-12-22 04:37:46,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:37:46,044 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-12-22 04:37:46,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 04:37:46,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:37:46,045 INFO L422 BasicCegarLoop]: trace histogram [44, 34, 10, 1, 1, 1, 1, 1, 1] [2020-12-22 04:37:46,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 04:37:46,259 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:37:46,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:37:46,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1852458889, now seen corresponding path program 32 times [2020-12-22 04:37:46,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:37:46,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693710752] [2020-12-22 04:37:46,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:37:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:37:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 04:37:47,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693710752] [2020-12-22 04:37:47,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30783328] [2020-12-22 04:37:47,542 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:37:47,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:37:47,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:37:47,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 99 conjunts are in the unsatisfiable core [2020-12-22 04:37:47,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:37:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:37:48,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:37:48,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 47] total 48 [2020-12-22 04:37:48,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685352332] [2020-12-22 04:37:48,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:37:48,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:37:48,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:37:48,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:37:48,500 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 48 states. [2020-12-22 04:37:51,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:37:51,183 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2020-12-22 04:37:51,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:37:51,184 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2020-12-22 04:37:51,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:37:51,185 INFO L225 Difference]: With dead ends: 124 [2020-12-22 04:37:51,186 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 04:37:51,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=128, Invalid=2128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:37:51,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 04:37:51,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-12-22 04:37:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-22 04:37:51,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-12-22 04:37:51,192 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 94 [2020-12-22 04:37:51,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:37:51,192 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-12-22 04:37:51,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:37:51,192 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-12-22 04:37:51,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 04:37:51,193 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:37:51,193 INFO L422 BasicCegarLoop]: trace histogram [45, 35, 10, 1, 1, 1, 1, 1, 1] [2020-12-22 04:37:51,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:37:51,403 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:37:51,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:37:51,404 INFO L82 PathProgramCache]: Analyzing trace with hash 2008172972, now seen corresponding path program 33 times [2020-12-22 04:37:51,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:37:51,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122911555] [2020-12-22 04:37:51,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:37:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:37:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 04:37:52,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122911555] [2020-12-22 04:37:52,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30681208] [2020-12-22 04:37:52,807 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:37:53,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-22 04:37:53,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:37:53,200 WARN L261 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-22 04:37:53,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:37:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 630 proven. 525 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2020-12-22 04:37:57,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:37:57,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 18] total 49 [2020-12-22 04:37:57,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187126899] [2020-12-22 04:37:57,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 04:37:57,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:37:57,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 04:37:57,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2188, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:37:57,465 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 49 states. [2020-12-22 04:38:02,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:38:02,345 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2020-12-22 04:38:02,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 04:38:02,346 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2020-12-22 04:38:02,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:38:02,348 INFO L225 Difference]: With dead ends: 128 [2020-12-22 04:38:02,348 INFO L226 Difference]: Without dead ends: 102 [2020-12-22 04:38:02,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 73 SyntacticMatches, 14 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=202, Invalid=2248, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:38:02,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-22 04:38:02,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-12-22 04:38:02,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-22 04:38:02,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-12-22 04:38:02,355 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 96 [2020-12-22 04:38:02,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:38:02,355 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-12-22 04:38:02,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 04:38:02,355 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-12-22 04:38:02,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 04:38:02,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:38:02,356 INFO L422 BasicCegarLoop]: trace histogram [47, 36, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:38:02,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:38:02,557 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:38:02,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:38:02,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1698225740, now seen corresponding path program 34 times [2020-12-22 04:38:02,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:38:02,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594830170] [2020-12-22 04:38:02,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:38:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:38:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 777 proven. 1332 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:38:04,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594830170] [2020-12-22 04:38:04,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786274787] [2020-12-22 04:38:04,012 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:38:04,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:38:04,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:38:04,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-22 04:38:04,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:38:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 777 proven. 1332 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:38:04,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:38:04,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 04:38:04,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181434945] [2020-12-22 04:38:04,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:38:04,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:38:04,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:38:04,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:38:04,398 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 40 states. [2020-12-22 04:38:06,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:38:06,924 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2020-12-22 04:38:06,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:38:06,925 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 100 [2020-12-22 04:38:06,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:38:06,927 INFO L225 Difference]: With dead ends: 132 [2020-12-22 04:38:06,927 INFO L226 Difference]: Without dead ends: 104 [2020-12-22 04:38:06,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:38:06,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-22 04:38:06,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-12-22 04:38:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-22 04:38:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-12-22 04:38:06,933 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 100 [2020-12-22 04:38:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:38:06,934 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-12-22 04:38:06,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:38:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-12-22 04:38:06,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 04:38:06,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:38:06,935 INFO L422 BasicCegarLoop]: trace histogram [48, 37, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:38:07,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:38:07,136 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:38:07,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:38:07,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1778401897, now seen corresponding path program 35 times [2020-12-22 04:38:07,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:38:07,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626445501] [2020-12-22 04:38:07,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:38:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:38:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:38:08,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626445501] [2020-12-22 04:38:08,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264175200] [2020-12-22 04:38:08,832 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:39:11,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2020-12-22 04:39:11,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:39:11,875 WARN L261 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 126 conjunts are in the unsatisfiable core [2020-12-22 04:39:11,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:39:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:39:13,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:39:13,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 04:39:13,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122792041] [2020-12-22 04:39:13,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:39:13,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:39:13,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:39:13,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:39:13,573 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 41 states. [2020-12-22 04:39:16,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:39:16,185 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2020-12-22 04:39:16,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:39:16,186 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 102 [2020-12-22 04:39:16,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:39:16,187 INFO L225 Difference]: With dead ends: 134 [2020-12-22 04:39:16,187 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 04:39:16,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 76 SyntacticMatches, 27 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:39:16,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 04:39:16,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-12-22 04:39:16,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 04:39:16,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-12-22 04:39:16,196 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 102 [2020-12-22 04:39:16,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:39:16,196 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-12-22 04:39:16,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:39:16,196 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-12-22 04:39:16,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 04:39:16,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:39:16,197 INFO L422 BasicCegarLoop]: trace histogram [49, 38, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:39:16,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:39:16,404 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:39:16,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:39:16,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1518277446, now seen corresponding path program 36 times [2020-12-22 04:39:16,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:39:16,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930675368] [2020-12-22 04:39:16,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:39:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:39:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:39:18,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930675368] [2020-12-22 04:39:18,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149174041] [2020-12-22 04:39:18,070 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:39:28,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2020-12-22 04:39:28,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:39:28,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 04:39:28,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:39:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 874 proven. 121 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2020-12-22 04:39:29,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:39:29,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 14] total 53 [2020-12-22 04:39:29,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451067594] [2020-12-22 04:39:29,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 04:39:29,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:39:29,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 04:39:29,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2335, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:39:29,823 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 53 states. [2020-12-22 04:39:35,035 WARN L197 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 12 [2020-12-22 04:39:36,833 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 12 [2020-12-22 04:39:40,284 WARN L197 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 12 [2020-12-22 04:39:43,306 WARN L197 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 12 [2020-12-22 04:39:44,963 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 12 [2020-12-22 04:39:47,072 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 12 [2020-12-22 04:39:48,563 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2020-12-22 04:39:50,565 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 12 [2020-12-22 04:39:51,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:39:51,874 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2020-12-22 04:39:51,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 04:39:51,875 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2020-12-22 04:39:51,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:39:51,876 INFO L225 Difference]: With dead ends: 140 [2020-12-22 04:39:51,876 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 04:39:51,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=605, Invalid=3555, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 04:39:51,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 04:39:51,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-12-22 04:39:51,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 04:39:51,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-12-22 04:39:51,886 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 104 [2020-12-22 04:39:51,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:39:51,887 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-12-22 04:39:51,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 04:39:51,887 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-12-22 04:39:51,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 04:39:51,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:39:51,888 INFO L422 BasicCegarLoop]: trace histogram [51, 39, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:39:52,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:39:52,088 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:39:52,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:39:52,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1263789634, now seen corresponding path program 37 times [2020-12-22 04:39:52,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:39:52,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919462184] [2020-12-22 04:39:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:39:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:39:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 920 proven. 1560 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:39:54,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919462184] [2020-12-22 04:39:54,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155925733] [2020-12-22 04:39:54,017 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:39:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:39:54,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-22 04:39:54,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:39:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 920 proven. 1560 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:39:54,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:39:54,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 04:39:54,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280274721] [2020-12-22 04:39:54,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:39:54,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:39:54,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:39:54,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:39:54,466 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 43 states. [2020-12-22 04:39:57,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:39:57,553 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2020-12-22 04:39:57,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:39:57,554 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 108 [2020-12-22 04:39:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:39:57,556 INFO L225 Difference]: With dead ends: 142 [2020-12-22 04:39:57,556 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 04:39:57,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:39:57,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 04:39:57,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-12-22 04:39:57,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-22 04:39:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-12-22 04:39:57,564 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 108 [2020-12-22 04:39:57,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:39:57,564 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-12-22 04:39:57,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:39:57,564 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-12-22 04:39:57,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 04:39:57,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:39:57,565 INFO L422 BasicCegarLoop]: trace histogram [52, 40, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:39:57,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:39:57,766 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:39:57,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:39:57,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1987047205, now seen corresponding path program 38 times [2020-12-22 04:39:57,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:39:57,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576412375] [2020-12-22 04:39:57,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:39:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:39:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:39:59,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576412375] [2020-12-22 04:39:59,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837628211] [2020-12-22 04:39:59,730 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:39:59,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:39:59,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:39:59,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 115 conjunts are in the unsatisfiable core [2020-12-22 04:39:59,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:40:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:40:01,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:40:01,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 55] total 56 [2020-12-22 04:40:01,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971006884] [2020-12-22 04:40:01,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 04:40:01,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:40:01,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 04:40:01,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:40:01,182 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states.