/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/loop-acceleration/simple_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:26:56,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:26:56,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:26:56,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:26:56,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:26:56,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:26:56,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:26:56,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:26:56,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:26:56,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:26:56,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:26:56,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:26:56,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:26:56,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:26:56,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:26:56,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:26:56,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:26:56,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:26:56,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:26:56,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:26:56,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:26:56,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:26:56,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:26:56,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:26:56,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:26:56,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:26:56,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:26:56,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:26:56,436 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:26:56,472 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:26:56,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:26:56,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:26:56,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:26:56,475 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:26:56,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:26:56,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:26:56,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:26:56,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:26:56,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:26:56,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:26:56,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:26:56,479 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:26:56,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:26:56,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:26:56,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:26:56,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:26:56,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:26:56,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:26:56,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:26:56,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:26:56,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:26:56,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:26:56,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:26:56,483 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:26:56,483 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:26:56,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:26:56,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:26:56,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:26:56,930 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:26:56,931 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:26:56,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/simple_4-1.c [2020-12-22 04:26:57,043 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e704c0355/ca5c0404f9874a34bfa186c6e1025751/FLAG22f97f16b [2020-12-22 04:26:57,637 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:26:57,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_4-1.c [2020-12-22 04:26:57,644 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e704c0355/ca5c0404f9874a34bfa186c6e1025751/FLAG22f97f16b [2020-12-22 04:26:58,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e704c0355/ca5c0404f9874a34bfa186c6e1025751 [2020-12-22 04:26:58,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:26:58,028 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:26:58,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:26:58,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:26:58,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:26:58,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:26:58" (1/1) ... [2020-12-22 04:26:58,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71dedced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:58, skipping insertion in model container [2020-12-22 04:26:58,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:26:58" (1/1) ... [2020-12-22 04:26:58,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:26:58,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:26:58,210 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/loop-acceleration/simple_4-1.c[322,335] [2020-12-22 04:26:58,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:26:58,233 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:26:58,251 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/loop-acceleration/simple_4-1.c[322,335] [2020-12-22 04:26:58,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:26:58,272 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:26:58,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:58 WrapperNode [2020-12-22 04:26:58,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:26:58,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:26:58,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:26:58,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:26:58,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:58" (1/1) ... [2020-12-22 04:26:58,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:58" (1/1) ... [2020-12-22 04:26:58,313 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:26:58,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:26:58,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:26:58,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:26:58,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:58" (1/1) ... [2020-12-22 04:26:58,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:58" (1/1) ... [2020-12-22 04:26:58,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:58" (1/1) ... [2020-12-22 04:26:58,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:58" (1/1) ... [2020-12-22 04:26:58,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:58" (1/1) ... [2020-12-22 04:26:58,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:58" (1/1) ... [2020-12-22 04:26:58,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:58" (1/1) ... [2020-12-22 04:26:58,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:26:58,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:26:58,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:26:58,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:26:58,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:58" (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 04:26:58,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:26:58,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:26:58,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:26:58,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:26:58,834 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:26:58,835 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:26:58,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:26:58 BoogieIcfgContainer [2020-12-22 04:26:58,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:26:58,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:26:58,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:26:58,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:26:58,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:26:58" (1/3) ... [2020-12-22 04:26:58,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b764344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:26:58, skipping insertion in model container [2020-12-22 04:26:58,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:58" (2/3) ... [2020-12-22 04:26:58,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b764344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:26:58, skipping insertion in model container [2020-12-22 04:26:58,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:26:58" (3/3) ... [2020-12-22 04:26:58,855 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_4-1.c [2020-12-22 04:26:58,864 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:26:58,869 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:26:58,891 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:26:58,936 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:26:58,937 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:26:58,937 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:26:58,937 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:26:58,937 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:26:58,937 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:26:58,938 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:26:58,938 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:26:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-12-22 04:26:59,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:26:59,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:59,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:26:59,051 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:59,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:59,059 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2020-12-22 04:26:59,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:59,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853996101] [2020-12-22 04:26:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:59,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853996101] [2020-12-22 04:26:59,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:26:59,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:26:59,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224587488] [2020-12-22 04:26:59,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:26:59,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:59,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:26:59,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:26:59,441 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2020-12-22 04:26:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:59,476 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2020-12-22 04:26:59,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:26:59,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 04:26:59,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:59,489 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:26:59,489 INFO L226 Difference]: Without dead ends: 8 [2020-12-22 04:26:59,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:26:59,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-22 04:26:59,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-22 04:26:59,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-22 04:26:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-22 04:26:59,549 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-22 04:26:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:59,549 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-22 04:26:59,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:26:59,550 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-22 04:26:59,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 04:26:59,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:59,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:59,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:26:59,551 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:59,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2020-12-22 04:26:59,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:59,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116049281] [2020-12-22 04:26:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:59,712 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 04:26:59,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116049281] [2020-12-22 04:26:59,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290209626] [2020-12-22 04:26:59,714 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 04:26:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:59,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:26:59,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:59,875 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 04:26:59,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:59,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:26:59,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010179453] [2020-12-22 04:26:59,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:26:59,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:59,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:26:59,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:26:59,880 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2020-12-22 04:26:59,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:59,900 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-12-22 04:26:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:26:59,901 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-22 04:26:59,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:59,902 INFO L225 Difference]: With dead ends: 13 [2020-12-22 04:26:59,902 INFO L226 Difference]: Without dead ends: 9 [2020-12-22 04:26:59,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:26:59,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-22 04:26:59,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-22 04:26:59,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 04:26:59,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-22 04:26:59,907 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-12-22 04:26:59,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:59,907 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-22 04:26:59,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:26:59,908 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-22 04:26:59,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:26:59,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:59,908 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:00,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:27:00,123 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:00,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:00,124 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2020-12-22 04:27:00,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:00,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276436698] [2020-12-22 04:27:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:00,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276436698] [2020-12-22 04:27:00,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795950296] [2020-12-22 04:27:00,262 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 04:27:00,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:27:00,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:00,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:27:00,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:00,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:00,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:27:00,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118858381] [2020-12-22 04:27:00,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:27:00,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:00,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:27:00,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:27:00,473 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2020-12-22 04:27:00,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:00,517 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-22 04:27:00,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:27:00,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-22 04:27:00,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:00,519 INFO L225 Difference]: With dead ends: 14 [2020-12-22 04:27:00,519 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:27:00,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:27:00,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:27:00,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 04:27:00,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 04:27:00,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-22 04:27:00,526 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-12-22 04:27:00,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:00,527 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-22 04:27:00,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:27:00,527 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-22 04:27:00,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:27:00,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:00,528 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:00,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:00,731 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:00,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:00,732 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 3 times [2020-12-22 04:27:00,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:00,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052628615] [2020-12-22 04:27:00,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:00,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:00,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052628615] [2020-12-22 04:27:00,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331845257] [2020-12-22 04:27:00,830 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 04:27:00,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:27:00,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:00,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:27:00,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:00,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:00,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:27:00,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835718028] [2020-12-22 04:27:00,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:27:00,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:00,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:27:00,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:27:00,970 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2020-12-22 04:27:01,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:01,013 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-22 04:27:01,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:27:01,014 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-22 04:27:01,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:01,015 INFO L225 Difference]: With dead ends: 15 [2020-12-22 04:27:01,015 INFO L226 Difference]: Without dead ends: 11 [2020-12-22 04:27:01,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:27:01,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-22 04:27:01,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-22 04:27:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:27:01,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-22 04:27:01,026 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-12-22 04:27:01,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:01,026 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-22 04:27:01,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:27:01,026 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-22 04:27:01,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:27:01,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:01,027 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:01,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:01,233 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:01,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:01,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 4 times [2020-12-22 04:27:01,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:01,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111635360] [2020-12-22 04:27:01,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:01,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111635360] [2020-12-22 04:27:01,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292257322] [2020-12-22 04:27:01,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:01,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:27:01,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:01,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:27:01,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:01,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:01,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:01,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:27:01,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433627992] [2020-12-22 04:27:01,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:27:01,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:01,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:27:01,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:27:01,528 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2020-12-22 04:27:01,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:01,568 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-22 04:27:01,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:27:01,569 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-22 04:27:01,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:01,569 INFO L225 Difference]: With dead ends: 16 [2020-12-22 04:27:01,569 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:27:01,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:27:01,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:27:01,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-22 04:27:01,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 04:27:01,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-22 04:27:01,574 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-12-22 04:27:01,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:01,574 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-22 04:27:01,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:27:01,574 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-22 04:27:01,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:27:01,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:01,575 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:01,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:01,788 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:01,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:01,789 INFO L82 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 5 times [2020-12-22 04:27:01,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:01,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053416840] [2020-12-22 04:27:01,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:01,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053416840] [2020-12-22 04:27:01,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706612277] [2020-12-22 04:27:01,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:02,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 04:27:02,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:02,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:27:02,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:02,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:02,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:27:02,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074704491] [2020-12-22 04:27:02,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:27:02,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:02,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:27:02,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:27:02,162 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2020-12-22 04:27:02,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:02,218 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-12-22 04:27:02,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:27:02,218 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-12-22 04:27:02,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:02,219 INFO L225 Difference]: With dead ends: 17 [2020-12-22 04:27:02,219 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 04:27:02,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:27:02,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 04:27:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 04:27:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 04:27:02,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-22 04:27:02,223 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-12-22 04:27:02,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:02,223 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-22 04:27:02,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:27:02,224 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-22 04:27:02,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:27:02,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:02,226 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:02,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 04:27:02,428 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:02,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:02,430 INFO L82 PathProgramCache]: Analyzing trace with hash -967103989, now seen corresponding path program 6 times [2020-12-22 04:27:02,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:02,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817140991] [2020-12-22 04:27:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:02,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817140991] [2020-12-22 04:27:02,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805926625] [2020-12-22 04:27:02,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:27:02,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 04:27:02,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:02,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:27:02,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:02,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:02,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:27:02,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025944929] [2020-12-22 04:27:02,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:27:02,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:02,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:27:02,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:27:02,919 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2020-12-22 04:27:03,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:03,008 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-22 04:27:03,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:27:03,009 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2020-12-22 04:27:03,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:03,009 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:27:03,009 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 04:27:03,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:27:03,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 04:27:03,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 04:27:03,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:27:03,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-22 04:27:03,014 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-12-22 04:27:03,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:03,014 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-22 04:27:03,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:27:03,014 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-22 04:27:03,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 04:27:03,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:03,015 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:03,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:03,221 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:03,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:03,223 INFO L82 PathProgramCache]: Analyzing trace with hash 86212784, now seen corresponding path program 7 times [2020-12-22 04:27:03,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:03,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539665431] [2020-12-22 04:27:03,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:03,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539665431] [2020-12-22 04:27:03,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709850220] [2020-12-22 04:27:03,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:03,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:27:03,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:03,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:03,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:27:03,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191272555] [2020-12-22 04:27:03,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:27:03,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:03,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:27:03,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:27:03,488 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2020-12-22 04:27:03,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:03,554 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-12-22 04:27:03,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:27:03,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-22 04:27:03,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:03,555 INFO L225 Difference]: With dead ends: 19 [2020-12-22 04:27:03,555 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 04:27:03,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:27:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 04:27:03,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-22 04:27:03,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 04:27:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-22 04:27:03,559 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-12-22 04:27:03,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:03,560 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-22 04:27:03,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:27:03,560 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-22 04:27:03,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:27:03,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:03,561 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:03,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:03,776 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:03,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:03,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1620705621, now seen corresponding path program 8 times [2020-12-22 04:27:03,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:03,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587793447] [2020-12-22 04:27:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:03,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587793447] [2020-12-22 04:27:03,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387165273] [2020-12-22 04:27:03,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:04,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:27:04,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:04,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:27:04,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:04,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:04,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 04:27:04,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051269036] [2020-12-22 04:27:04,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:27:04,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:04,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:27:04,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:27:04,131 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-12-22 04:27:04,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:04,220 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-22 04:27:04,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:27:04,220 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-12-22 04:27:04,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:04,222 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:27:04,222 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 04:27:04,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:27:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 04:27:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-22 04:27:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 04:27:04,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-22 04:27:04,237 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-12-22 04:27:04,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:04,237 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-22 04:27:04,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:27:04,238 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-22 04:27:04,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 04:27:04,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:04,238 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:04,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 04:27:04,442 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:04,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:04,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1299398672, now seen corresponding path program 9 times [2020-12-22 04:27:04,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:04,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196963023] [2020-12-22 04:27:04,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:04,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196963023] [2020-12-22 04:27:04,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377000688] [2020-12-22 04:27:04,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:04,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 04:27:04,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:04,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:27:04,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:04,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:04,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:27:04,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080719235] [2020-12-22 04:27:04,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:27:04,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:04,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:27:04,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:27:04,888 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 13 states. [2020-12-22 04:27:04,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:04,969 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-12-22 04:27:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:27:04,970 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-12-22 04:27:04,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:04,971 INFO L225 Difference]: With dead ends: 21 [2020-12-22 04:27:04,971 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 04:27:04,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:27:04,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 04:27:04,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-22 04:27:04,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:27:04,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-22 04:27:04,975 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-12-22 04:27:04,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:04,975 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-22 04:27:04,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:27:04,976 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-22 04:27:04,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:27:04,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:04,976 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:05,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:05,182 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:05,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:05,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 10 times [2020-12-22 04:27:05,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:05,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993407007] [2020-12-22 04:27:05,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:05,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993407007] [2020-12-22 04:27:05,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529424059] [2020-12-22 04:27:05,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:05,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:27:05,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:05,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 04:27:05,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:05,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:05,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 04:27:05,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008762478] [2020-12-22 04:27:05,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:27:05,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:05,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:27:05,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:27:05,484 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 14 states. [2020-12-22 04:27:05,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:05,588 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-22 04:27:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:27:05,589 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2020-12-22 04:27:05,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:05,590 INFO L225 Difference]: With dead ends: 22 [2020-12-22 04:27:05,590 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 04:27:05,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:27:05,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 04:27:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 04:27:05,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 04:27:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-12-22 04:27:05,594 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-12-22 04:27:05,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:05,594 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-12-22 04:27:05,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:27:05,595 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-12-22 04:27:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 04:27:05,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:05,595 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:05,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:05,809 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:05,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:05,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1060067472, now seen corresponding path program 11 times [2020-12-22 04:27:05,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:05,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273198706] [2020-12-22 04:27:05,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:06,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273198706] [2020-12-22 04:27:06,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504958301] [2020-12-22 04:27:06,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:06,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 04:27:06,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:06,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:27:06,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:06,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:06,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 04:27:06,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779510271] [2020-12-22 04:27:06,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:27:06,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:06,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:27:06,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:27:06,425 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 15 states. [2020-12-22 04:27:06,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:06,536 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-12-22 04:27:06,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:27:06,537 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2020-12-22 04:27:06,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:06,538 INFO L225 Difference]: With dead ends: 23 [2020-12-22 04:27:06,538 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 04:27:06,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 10 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:27:06,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 04:27:06,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 04:27:06,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:27:06,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-22 04:27:06,542 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-12-22 04:27:06,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:06,542 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-22 04:27:06,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:27:06,543 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-22 04:27:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:27:06,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:06,543 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:06,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 04:27:06,750 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:06,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:06,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1499312107, now seen corresponding path program 12 times [2020-12-22 04:27:06,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:06,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150884728] [2020-12-22 04:27:06,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:06,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150884728] [2020-12-22 04:27:06,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138120359] [2020-12-22 04:27:06,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:07,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:27:07,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:07,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:27:07,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:07,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:07,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 04:27:07,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743999917] [2020-12-22 04:27:07,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:27:07,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:07,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:27:07,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:27:07,163 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 16 states. [2020-12-22 04:27:07,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:07,321 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-22 04:27:07,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:27:07,322 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2020-12-22 04:27:07,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:07,323 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:27:07,323 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:27:07,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:27:07,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:27:07,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-22 04:27:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 04:27:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-22 04:27:07,328 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-12-22 04:27:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:07,328 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-22 04:27:07,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:27:07,328 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-22 04:27:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:27:07,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:07,329 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:07,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:27:07,532 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:07,533 INFO L82 PathProgramCache]: Analyzing trace with hash -764299568, now seen corresponding path program 13 times [2020-12-22 04:27:07,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:07,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379566261] [2020-12-22 04:27:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:07,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379566261] [2020-12-22 04:27:07,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225838309] [2020-12-22 04:27:07,783 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 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 04:27:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:07,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:27:07,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:07,920 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:07,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:07,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:27:07,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144642425] [2020-12-22 04:27:07,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:27:07,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:07,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:27:07,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:27:07,923 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 17 states. [2020-12-22 04:27:08,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:08,086 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-12-22 04:27:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:27:08,087 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 19 [2020-12-22 04:27:08,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:08,087 INFO L225 Difference]: With dead ends: 25 [2020-12-22 04:27:08,088 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 04:27:08,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:27:08,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 04:27:08,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-22 04:27:08,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 04:27:08,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-22 04:27:08,092 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-12-22 04:27:08,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:08,093 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-22 04:27:08,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:27:08,093 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-22 04:27:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:27:08,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:08,094 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:08,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:27:08,310 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:08,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:08,311 INFO L82 PathProgramCache]: Analyzing trace with hash 2078182539, now seen corresponding path program 14 times [2020-12-22 04:27:08,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:08,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431347359] [2020-12-22 04:27:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:08,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431347359] [2020-12-22 04:27:08,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224909342] [2020-12-22 04:27:08,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:08,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:27:08,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:08,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:27:08,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:08,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:08,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 04:27:08,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283281723] [2020-12-22 04:27:08,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:27:08,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:08,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:27:08,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:27:08,736 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 18 states. [2020-12-22 04:27:08,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:08,938 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-22 04:27:08,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:27:08,939 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 20 [2020-12-22 04:27:08,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:08,939 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:27:08,939 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 04:27:08,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:27:08,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 04:27:08,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-22 04:27:08,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 04:27:08,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-22 04:27:08,945 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-12-22 04:27:08,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:08,945 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-22 04:27:08,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:27:08,945 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-22 04:27:08,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:27:08,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:08,946 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:09,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:09,149 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:09,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:09,150 INFO L82 PathProgramCache]: Analyzing trace with hash 814640, now seen corresponding path program 15 times [2020-12-22 04:27:09,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:09,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406830998] [2020-12-22 04:27:09,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:09,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406830998] [2020-12-22 04:27:09,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287474190] [2020-12-22 04:27:09,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:09,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 04:27:09,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:09,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 04:27:09,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:09,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:09,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:27:09,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341195942] [2020-12-22 04:27:09,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:27:09,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:09,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:27:09,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:27:09,681 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 19 states. [2020-12-22 04:27:09,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:09,860 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-12-22 04:27:09,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:27:09,860 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2020-12-22 04:27:09,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:09,861 INFO L225 Difference]: With dead ends: 27 [2020-12-22 04:27:09,861 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 04:27:09,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:27:09,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 04:27:09,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 04:27:09,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:27:09,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-22 04:27:09,866 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-12-22 04:27:09,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:09,866 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-22 04:27:09,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:27:09,866 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-22 04:27:09,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:27:09,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:09,867 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:10,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:27:10,071 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:10,072 INFO L82 PathProgramCache]: Analyzing trace with hash 26919211, now seen corresponding path program 16 times [2020-12-22 04:27:10,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:10,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403846945] [2020-12-22 04:27:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:10,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403846945] [2020-12-22 04:27:10,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51639173] [2020-12-22 04:27:10,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:10,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:27:10,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:10,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:27:10,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:10,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:10,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 04:27:10,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133505266] [2020-12-22 04:27:10,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:27:10,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:10,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:27:10,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:27:10,524 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 20 states. [2020-12-22 04:27:10,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:10,754 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-22 04:27:10,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:27:10,755 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2020-12-22 04:27:10,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:10,755 INFO L225 Difference]: With dead ends: 28 [2020-12-22 04:27:10,756 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:27:10,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:27:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:27:10,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 04:27:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 04:27:10,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-22 04:27:10,760 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-12-22 04:27:10,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:10,760 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-22 04:27:10,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:27:10,761 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-22 04:27:10,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:27:10,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:10,761 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:10,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:27:10,975 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:10,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:10,976 INFO L82 PathProgramCache]: Analyzing trace with hash 836160912, now seen corresponding path program 17 times [2020-12-22 04:27:10,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:10,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845615507] [2020-12-22 04:27:10,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:11,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845615507] [2020-12-22 04:27:11,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397076894] [2020-12-22 04:27:11,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:12,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 04:27:12,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:12,456 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 04:27:12,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:12,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:12,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 04:27:12,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865269275] [2020-12-22 04:27:12,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:27:12,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:12,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:27:12,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:27:12,860 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 21 states. [2020-12-22 04:27:13,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:13,116 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-12-22 04:27:13,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:27:13,116 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2020-12-22 04:27:13,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:13,117 INFO L225 Difference]: With dead ends: 29 [2020-12-22 04:27:13,117 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 04:27:13,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 17 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:27:13,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 04:27:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-22 04:27:13,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:27:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-22 04:27:13,122 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-12-22 04:27:13,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:13,122 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-22 04:27:13,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:27:13,122 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-22 04:27:13,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:27:13,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:13,123 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:13,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:27:13,327 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:13,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:13,329 INFO L82 PathProgramCache]: Analyzing trace with hash 152849867, now seen corresponding path program 18 times [2020-12-22 04:27:13,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:13,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710008659] [2020-12-22 04:27:13,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:13,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710008659] [2020-12-22 04:27:13,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597683100] [2020-12-22 04:27:13,742 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 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 04:27:13,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-22 04:27:13,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:13,988 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 04:27:13,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:14,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:14,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:27:14,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811799517] [2020-12-22 04:27:14,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:27:14,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:14,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:27:14,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:27:14,252 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 22 states. [2020-12-22 04:27:14,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:14,532 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-22 04:27:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:27:14,532 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2020-12-22 04:27:14,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:14,533 INFO L225 Difference]: With dead ends: 30 [2020-12-22 04:27:14,533 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 04:27:14,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:27:14,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 04:27:14,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-22 04:27:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 04:27:14,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-12-22 04:27:14,538 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-12-22 04:27:14,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:14,538 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-12-22 04:27:14,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:27:14,539 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-12-22 04:27:14,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:27:14,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:14,539 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:14,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:14,743 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:14,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:14,744 INFO L82 PathProgramCache]: Analyzing trace with hash 445043952, now seen corresponding path program 19 times [2020-12-22 04:27:14,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:14,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912400755] [2020-12-22 04:27:14,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:15,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912400755] [2020-12-22 04:27:15,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147290117] [2020-12-22 04:27:15,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:15,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:27:15,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:15,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:15,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:27:15,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531855107] [2020-12-22 04:27:15,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:27:15,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:15,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:27:15,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:27:15,325 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 23 states. [2020-12-22 04:27:15,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:15,601 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-12-22 04:27:15,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:27:15,601 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2020-12-22 04:27:15,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:15,603 INFO L225 Difference]: With dead ends: 31 [2020-12-22 04:27:15,603 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 04:27:15,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:27:15,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 04:27:15,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-22 04:27:15,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:27:15,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-22 04:27:15,613 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-12-22 04:27:15,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:15,616 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-22 04:27:15,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:27:15,616 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-22 04:27:15,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:27:15,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:15,617 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:15,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:15,820 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:15,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:15,820 INFO L82 PathProgramCache]: Analyzing trace with hash 913125995, now seen corresponding path program 20 times [2020-12-22 04:27:15,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:15,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972972962] [2020-12-22 04:27:15,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:16,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972972962] [2020-12-22 04:27:16,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939117944] [2020-12-22 04:27:16,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:16,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:27:16,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:16,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:27:16,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:16,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:16,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 04:27:16,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816942743] [2020-12-22 04:27:16,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:27:16,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:16,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:27:16,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:27:16,524 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 24 states. [2020-12-22 04:27:16,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:16,859 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-22 04:27:16,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:27:16,859 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2020-12-22 04:27:16,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:16,860 INFO L225 Difference]: With dead ends: 32 [2020-12-22 04:27:16,860 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:27:16,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:27:16,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:27:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 04:27:16,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 04:27:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-12-22 04:27:16,864 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-12-22 04:27:16,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:16,864 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-12-22 04:27:16,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:27:16,864 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-12-22 04:27:16,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:27:16,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:16,865 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:17,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 04:27:17,071 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:17,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:17,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1756199856, now seen corresponding path program 21 times [2020-12-22 04:27:17,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:17,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420128059] [2020-12-22 04:27:17,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:17,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420128059] [2020-12-22 04:27:17,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115487968] [2020-12-22 04:27:17,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:17,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 04:27:17,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:17,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 04:27:17,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:18,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:18,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:27:18,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897751252] [2020-12-22 04:27:18,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:27:18,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:18,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:27:18,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:27:18,283 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 25 states. [2020-12-22 04:27:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:18,627 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-12-22 04:27:18,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:27:18,631 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 27 [2020-12-22 04:27:18,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:18,631 INFO L225 Difference]: With dead ends: 33 [2020-12-22 04:27:18,632 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 04:27:18,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:27:18,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 04:27:18,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-22 04:27:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:27:18,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-22 04:27:18,636 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-12-22 04:27:18,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:18,636 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-22 04:27:18,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:27:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-22 04:27:18,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:27:18,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:18,637 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:18,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:27:18,843 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:18,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1394044683, now seen corresponding path program 22 times [2020-12-22 04:27:18,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:18,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968562206] [2020-12-22 04:27:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:19,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968562206] [2020-12-22 04:27:19,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522132024] [2020-12-22 04:27:19,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:19,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:27:19,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:19,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 04:27:19,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:19,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:19,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 04:27:19,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464503940] [2020-12-22 04:27:19,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:27:19,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:19,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:27:19,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:27:19,544 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 26 states. [2020-12-22 04:27:19,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:19,920 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-22 04:27:19,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:27:19,920 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-12-22 04:27:19,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:19,921 INFO L225 Difference]: With dead ends: 34 [2020-12-22 04:27:19,921 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 04:27:19,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:27:19,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 04:27:19,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-22 04:27:19,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 04:27:19,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-12-22 04:27:19,925 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-12-22 04:27:19,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:19,926 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-12-22 04:27:19,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:27:19,926 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-12-22 04:27:19,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:27:19,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:19,926 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:20,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:20,141 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:20,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:20,142 INFO L82 PathProgramCache]: Analyzing trace with hash 267377584, now seen corresponding path program 23 times [2020-12-22 04:27:20,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:20,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276769006] [2020-12-22 04:27:20,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:20,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276769006] [2020-12-22 04:27:20,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344392072] [2020-12-22 04:27:20,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:22,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-22 04:27:22,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:22,479 WARN L261 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 04:27:22,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:22,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:22,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 04:27:22,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146844748] [2020-12-22 04:27:22,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:27:22,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:22,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:27:22,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:27:22,769 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 27 states. [2020-12-22 04:27:23,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:23,234 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-12-22 04:27:23,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:27:23,234 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 29 [2020-12-22 04:27:23,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:23,235 INFO L225 Difference]: With dead ends: 35 [2020-12-22 04:27:23,235 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 04:27:23,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:27:23,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 04:27:23,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-22 04:27:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:27:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-22 04:27:23,239 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-12-22 04:27:23,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:23,240 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-22 04:27:23,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:27:23,240 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-22 04:27:23,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:27:23,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:23,240 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:23,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 04:27:23,444 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:23,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:23,445 INFO L82 PathProgramCache]: Analyzing trace with hash -299564117, now seen corresponding path program 24 times [2020-12-22 04:27:23,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:23,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491968420] [2020-12-22 04:27:23,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:24,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491968420] [2020-12-22 04:27:24,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920221286] [2020-12-22 04:27:24,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:25,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 04:27:25,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:25,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 04:27:25,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:26,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:26,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 04:27:26,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550651894] [2020-12-22 04:27:26,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:27:26,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:26,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:27:26,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:27:26,260 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 28 states. [2020-12-22 04:27:26,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:26,705 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-22 04:27:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:27:26,705 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2020-12-22 04:27:26,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:26,706 INFO L225 Difference]: With dead ends: 36 [2020-12-22 04:27:26,706 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:27:26,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:27:26,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:27:26,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-22 04:27:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 04:27:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-12-22 04:27:26,710 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-12-22 04:27:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:26,710 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-12-22 04:27:26,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:27:26,711 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-12-22 04:27:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:27:26,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:26,711 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:26,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:26,915 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:26,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:26,916 INFO L82 PathProgramCache]: Analyzing trace with hash -694887664, now seen corresponding path program 25 times [2020-12-22 04:27:26,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:26,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045525534] [2020-12-22 04:27:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:27,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045525534] [2020-12-22 04:27:27,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280965945] [2020-12-22 04:27:27,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:27,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 04:27:27,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:27,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:27,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 04:27:27,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864572309] [2020-12-22 04:27:27,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:27:27,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:27,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:27:27,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:27:27,711 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 29 states. [2020-12-22 04:27:28,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:28,285 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-12-22 04:27:28,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:27:28,286 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2020-12-22 04:27:28,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:28,286 INFO L225 Difference]: With dead ends: 37 [2020-12-22 04:27:28,286 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 04:27:28,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:27:28,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 04:27:28,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-22 04:27:28,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:27:28,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-12-22 04:27:28,291 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-12-22 04:27:28,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:28,291 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-12-22 04:27:28,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:27:28,291 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-12-22 04:27:28,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:27:28,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:28,292 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:28,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 04:27:28,501 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:28,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:28,501 INFO L82 PathProgramCache]: Analyzing trace with hash -65015733, now seen corresponding path program 26 times [2020-12-22 04:27:28,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:28,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496647915] [2020-12-22 04:27:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:29,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496647915] [2020-12-22 04:27:29,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552147520] [2020-12-22 04:27:29,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:29,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:27:29,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:29,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 04:27:29,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:29,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:29,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 04:27:29,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144942094] [2020-12-22 04:27:29,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 04:27:29,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:29,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 04:27:29,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:27:29,468 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 30 states. [2020-12-22 04:27:30,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:30,068 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-22 04:27:30,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:27:30,070 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 32 [2020-12-22 04:27:30,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:30,070 INFO L225 Difference]: With dead ends: 38 [2020-12-22 04:27:30,071 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 04:27:30,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:27:30,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 04:27:30,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-22 04:27:30,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 04:27:30,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-12-22 04:27:30,075 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-12-22 04:27:30,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:30,075 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-12-22 04:27:30,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 04:27:30,075 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-12-22 04:27:30,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:27:30,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:30,076 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:30,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:27:30,279 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:30,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:30,280 INFO L82 PathProgramCache]: Analyzing trace with hash -2013822352, now seen corresponding path program 27 times [2020-12-22 04:27:30,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:30,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712599318] [2020-12-22 04:27:30,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:31,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712599318] [2020-12-22 04:27:31,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281963131] [2020-12-22 04:27:31,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:31,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-22 04:27:31,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:31,702 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 04:27:31,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:31,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:31,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 04:27:31,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014133213] [2020-12-22 04:27:31,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:27:31,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:31,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:27:31,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:27:31,976 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 31 states. [2020-12-22 04:27:32,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:32,600 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-12-22 04:27:32,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:27:32,601 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 33 [2020-12-22 04:27:32,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:32,601 INFO L225 Difference]: With dead ends: 39 [2020-12-22 04:27:32,601 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 04:27:32,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:27:32,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 04:27:32,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-22 04:27:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 04:27:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-22 04:27:32,605 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-12-22 04:27:32,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:32,606 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-22 04:27:32,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:27:32,606 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-22 04:27:32,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:27:32,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:32,606 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:32,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:27:32,807 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:32,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:32,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1997681899, now seen corresponding path program 28 times [2020-12-22 04:27:32,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:32,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461389790] [2020-12-22 04:27:32,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:33,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461389790] [2020-12-22 04:27:33,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102475594] [2020-12-22 04:27:33,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:33,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:27:33,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:33,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 04:27:33,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:33,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:33,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 04:27:33,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119760127] [2020-12-22 04:27:33,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:27:33,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:33,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:27:33,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:27:33,706 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 32 states. [2020-12-22 04:27:34,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:34,369 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-22 04:27:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:27:34,369 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 34 [2020-12-22 04:27:34,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:34,370 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:27:34,370 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 04:27:34,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:27:34,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 04:27:34,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-22 04:27:34,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 04:27:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-12-22 04:27:34,376 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-12-22 04:27:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:34,377 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-12-22 04:27:34,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:27:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-12-22 04:27:34,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 04:27:34,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:34,377 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:34,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:27:34,582 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:34,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:34,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1800262096, now seen corresponding path program 29 times [2020-12-22 04:27:34,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:34,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559519735] [2020-12-22 04:27:34,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:35,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559519735] [2020-12-22 04:27:35,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129074642] [2020-12-22 04:27:35,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:01,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-22 04:28:01,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:01,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-22 04:28:01,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:02,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:02,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 04:28:02,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979704454] [2020-12-22 04:28:02,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:28:02,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:02,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:28:02,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:28:02,539 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 33 states. [2020-12-22 04:28:03,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:03,265 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-12-22 04:28:03,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:28:03,266 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 35 [2020-12-22 04:28:03,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:03,267 INFO L225 Difference]: With dead ends: 41 [2020-12-22 04:28:03,267 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 04:28:03,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 28 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:28:03,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 04:28:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-22 04:28:03,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:28:03,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-22 04:28:03,279 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-12-22 04:28:03,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:03,279 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-22 04:28:03,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:28:03,280 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-22 04:28:03,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:28:03,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:03,281 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:03,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:03,482 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:03,486 INFO L82 PathProgramCache]: Analyzing trace with hash -24784501, now seen corresponding path program 30 times [2020-12-22 04:28:03,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:03,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937275484] [2020-12-22 04:28:03,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:04,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937275484] [2020-12-22 04:28:04,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988523835] [2020-12-22 04:28:04,331 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 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 04:28:05,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-22 04:28:05,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:05,715 WARN L261 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 04:28:05,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:05,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:05,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 04:28:05,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479473870] [2020-12-22 04:28:05,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:28:05,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:05,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:28:05,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:28:05,826 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 34 states. [2020-12-22 04:28:06,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:06,522 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-12-22 04:28:06,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:28:06,522 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 36 [2020-12-22 04:28:06,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:06,523 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:28:06,523 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:28:06,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:28:06,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:28:06,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-22 04:28:06,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:28:06,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-12-22 04:28:06,528 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-12-22 04:28:06,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:06,528 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-12-22 04:28:06,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:28:06,528 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-12-22 04:28:06,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:28:06,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:06,529 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:06,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:06,733 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:06,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:06,733 INFO L82 PathProgramCache]: Analyzing trace with hash -766654160, now seen corresponding path program 31 times [2020-12-22 04:28:06,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:06,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507788051] [2020-12-22 04:28:06,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:07,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507788051] [2020-12-22 04:28:07,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727116255] [2020-12-22 04:28:07,741 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 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 04:28:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:07,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 04:28:07,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:07,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:07,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 04:28:07,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733105710] [2020-12-22 04:28:07,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:28:07,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:07,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:28:07,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:28:07,913 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 35 states. [2020-12-22 04:28:08,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:08,759 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-12-22 04:28:08,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:28:08,762 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 37 [2020-12-22 04:28:08,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:08,762 INFO L225 Difference]: With dead ends: 43 [2020-12-22 04:28:08,763 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 04:28:08,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:28:08,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 04:28:08,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-22 04:28:08,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 04:28:08,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-12-22 04:28:08,767 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-12-22 04:28:08,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:08,767 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-12-22 04:28:08,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:28:08,768 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-12-22 04:28:08,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:28:08,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:08,768 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:08,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:08,969 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:08,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:08,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2005190187, now seen corresponding path program 32 times [2020-12-22 04:28:08,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:08,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973074346] [2020-12-22 04:28:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:10,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973074346] [2020-12-22 04:28:10,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204679166] [2020-12-22 04:28:10,069 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 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 04:28:10,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:28:10,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:10,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 04:28:10,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:10,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:10,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 04:28:10,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689871368] [2020-12-22 04:28:10,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:28:10,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:10,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:28:10,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:28:10,237 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 36 states. [2020-12-22 04:28:11,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:11,059 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-22 04:28:11,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:28:11,060 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 38 [2020-12-22 04:28:11,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:11,062 INFO L225 Difference]: With dead ends: 44 [2020-12-22 04:28:11,062 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:28:11,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:28:11,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:28:11,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-22 04:28:11,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 04:28:11,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-12-22 04:28:11,067 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-12-22 04:28:11,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:11,067 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-12-22 04:28:11,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:28:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-12-22 04:28:11,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 04:28:11,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:11,068 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:11,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 04:28:11,271 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:11,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:11,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2033019024, now seen corresponding path program 33 times [2020-12-22 04:28:11,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:11,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634550567] [2020-12-22 04:28:11,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:12,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634550567] [2020-12-22 04:28:12,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767574425] [2020-12-22 04:28:12,389 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 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 04:28:12,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-22 04:28:12,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:12,994 WARN L261 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-22 04:28:12,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:13,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:13,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 04:28:13,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455458307] [2020-12-22 04:28:13,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:28:13,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:13,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:28:13,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:28:13,247 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 37 states. [2020-12-22 04:28:14,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:14,193 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-12-22 04:28:14,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:28:14,194 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 39 [2020-12-22 04:28:14,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:14,194 INFO L225 Difference]: With dead ends: 45 [2020-12-22 04:28:14,194 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 04:28:14,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:28:14,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 04:28:14,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-22 04:28:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 04:28:14,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-22 04:28:14,198 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-12-22 04:28:14,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:14,198 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-22 04:28:14,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:28:14,198 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-22 04:28:14,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:28:14,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:14,199 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:14,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:14,403 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:14,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:14,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1399254325, now seen corresponding path program 34 times [2020-12-22 04:28:14,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:14,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731594571] [2020-12-22 04:28:14,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:15,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731594571] [2020-12-22 04:28:15,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842091047] [2020-12-22 04:28:15,487 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 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 04:28:15,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:28:15,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:15,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-22 04:28:15,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:15,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:15,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 04:28:15,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803482496] [2020-12-22 04:28:15,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 04:28:15,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:15,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 04:28:15,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:28:15,671 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 38 states. [2020-12-22 04:28:16,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:16,692 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-22 04:28:16,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:28:16,693 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 40 [2020-12-22 04:28:16,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:16,693 INFO L225 Difference]: With dead ends: 46 [2020-12-22 04:28:16,694 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 04:28:16,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:28:16,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 04:28:16,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-22 04:28:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 04:28:16,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-12-22 04:28:16,713 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-12-22 04:28:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:16,713 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-12-22 04:28:16,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 04:28:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-12-22 04:28:16,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 04:28:16,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:16,714 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:16,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:28:16,929 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:16,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:16,929 INFO L82 PathProgramCache]: Analyzing trace with hash -425545744, now seen corresponding path program 35 times [2020-12-22 04:28:16,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:16,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353501560] [2020-12-22 04:28:16,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:18,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353501560] [2020-12-22 04:28:18,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602256573] [2020-12-22 04:28:18,104 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 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 04:29:30,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-22 04:29:30,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:29:30,729 WARN L261 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 101 conjunts are in the unsatisfiable core [2020-12-22 04:29:30,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:29:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:31,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:29:31,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 04:29:31,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395664757] [2020-12-22 04:29:31,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:29:31,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:29:31,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:29:31,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:29:31,933 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 39 states. [2020-12-22 04:29:32,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:29:32,982 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-12-22 04:29:32,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:29:32,983 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 41 [2020-12-22 04:29:32,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:29:32,983 INFO L225 Difference]: With dead ends: 47 [2020-12-22 04:29:32,983 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 04:29:32,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 14 SyntacticMatches, 28 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:29:32,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 04:29:32,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-22 04:29:32,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 04:29:32,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-22 04:29:32,987 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-12-22 04:29:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:29:32,987 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-22 04:29:32,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:29:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-22 04:29:32,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:29:32,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:29:32,988 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1] [2020-12-22 04:29:33,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:29:33,194 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:29:33,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:29:33,195 INFO L82 PathProgramCache]: Analyzing trace with hash -305350805, now seen corresponding path program 36 times [2020-12-22 04:29:33,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:29:33,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777007820] [2020-12-22 04:29:33,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:29:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:34,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777007820] [2020-12-22 04:29:34,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821589180] [2020-12-22 04:29:34,442 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 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 04:29:39,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 04:29:39,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:29:39,697 WARN L261 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 103 conjunts are in the unsatisfiable core [2020-12-22 04:29:39,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:29:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:40,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:29:40,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 04:29:40,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570809596] [2020-12-22 04:29:40,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:29:40,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:29:40,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:29:40,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:29:40,951 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 40 states. [2020-12-22 04:29:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:29:42,010 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-22 04:29:42,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:29:42,010 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 42 [2020-12-22 04:29:42,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:29:42,011 INFO L225 Difference]: With dead ends: 48 [2020-12-22 04:29:42,011 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 04:29:42,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 28 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:29:42,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 04:29:42,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-22 04:29:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 04:29:42,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-12-22 04:29:42,015 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-12-22 04:29:42,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:29:42,016 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-12-22 04:29:42,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:29:42,016 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-12-22 04:29:42,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 04:29:42,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:29:42,016 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1] [2020-12-22 04:29:42,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:29:42,217 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:29:42,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:29:42,218 INFO L82 PathProgramCache]: Analyzing trace with hash -874274992, now seen corresponding path program 37 times [2020-12-22 04:29:42,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:29:42,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691408780] [2020-12-22 04:29:42,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:29:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:43,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691408780] [2020-12-22 04:29:43,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128811150] [2020-12-22 04:29:43,511 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 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 04:29:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:43,561 WARN L261 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 04:29:43,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:29:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:43,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:29:43,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 04:29:43,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226201318] [2020-12-22 04:29:43,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:29:43,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:29:43,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:29:43,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:29:43,694 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 41 states. [2020-12-22 04:29:44,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:29:44,867 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-12-22 04:29:44,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:29:44,870 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 43 [2020-12-22 04:29:44,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:29:44,871 INFO L225 Difference]: With dead ends: 49 [2020-12-22 04:29:44,872 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 04:29:44,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:29:44,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 04:29:44,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-22 04:29:44,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 04:29:44,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-12-22 04:29:44,875 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-12-22 04:29:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:29:44,875 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-12-22 04:29:44,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:29:44,876 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-12-22 04:29:44,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:29:44,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:29:44,876 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1] [2020-12-22 04:29:45,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:29:45,085 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:29:45,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:29:45,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1331055605, now seen corresponding path program 38 times [2020-12-22 04:29:45,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:29:45,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899848546] [2020-12-22 04:29:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:29:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:46,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899848546] [2020-12-22 04:29:46,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038670493] [2020-12-22 04:29:46,473 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 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 04:29:46,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:29:46,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:29:46,549 WARN L261 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-22 04:29:46,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:29:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:46,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:29:46,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 04:29:46,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406937853] [2020-12-22 04:29:46,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 04:29:46,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:29:46,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 04:29:46,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:29:46,670 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 42 states. [2020-12-22 04:29:47,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:29:47,760 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-22 04:29:47,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:29:47,761 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 44 [2020-12-22 04:29:47,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:29:47,762 INFO L225 Difference]: With dead ends: 50 [2020-12-22 04:29:47,762 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 04:29:47,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:29:47,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 04:29:47,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 04:29:47,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 04:29:47,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-12-22 04:29:47,766 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-12-22 04:29:47,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:29:47,766 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-12-22 04:29:47,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 04:29:47,766 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-12-22 04:29:47,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 04:29:47,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:29:47,767 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1] [2020-12-22 04:29:47,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:29:47,969 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:29:47,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:29:47,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1688614576, now seen corresponding path program 39 times [2020-12-22 04:29:47,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:29:47,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964796916] [2020-12-22 04:29:47,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:29:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:49,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964796916] [2020-12-22 04:29:49,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433861906] [2020-12-22 04:29:49,409 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 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 04:29:50,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-22 04:29:50,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:29:50,477 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 89 conjunts are in the unsatisfiable core [2020-12-22 04:29:50,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:29:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:51,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:29:51,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 04:29:51,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618236701] [2020-12-22 04:29:51,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:29:51,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:29:51,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:29:51,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:29:51,099 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 43 states. [2020-12-22 04:29:52,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:29:52,344 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-12-22 04:29:52,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:29:52,345 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 45 [2020-12-22 04:29:52,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:29:52,346 INFO L225 Difference]: With dead ends: 51 [2020-12-22 04:29:52,346 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 04:29:52,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:29:52,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 04:29:52,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-22 04:29:52,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 04:29:52,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-12-22 04:29:52,350 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-12-22 04:29:52,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:29:52,350 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-12-22 04:29:52,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:29:52,350 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-12-22 04:29:52,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:29:52,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:29:52,351 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1] [2020-12-22 04:29:52,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:29:52,555 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:29:52,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:29:52,556 INFO L82 PathProgramCache]: Analyzing trace with hash 809109675, now seen corresponding path program 40 times [2020-12-22 04:29:52,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:29:52,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451297507] [2020-12-22 04:29:52,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:29:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:54,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451297507] [2020-12-22 04:29:54,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322895429] [2020-12-22 04:29:54,173 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 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 04:29:54,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:29:54,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:29:54,230 WARN L261 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-22 04:29:54,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:29:54,372 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:54,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:29:54,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-22 04:29:54,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877732654] [2020-12-22 04:29:54,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 04:29:54,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:29:54,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 04:29:54,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:29:54,374 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 44 states. [2020-12-22 04:29:55,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:29:55,669 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-22 04:29:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 04:29:55,670 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 46 [2020-12-22 04:29:55,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:29:55,670 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:29:55,671 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:29:55,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:29:55,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:29:55,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-22 04:29:55,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 04:29:55,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-12-22 04:29:55,675 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-12-22 04:29:55,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:29:55,675 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-12-22 04:29:55,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 04:29:55,675 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-12-22 04:29:55,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 04:29:55,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:29:55,676 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1] [2020-12-22 04:29:55,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:29:55,877 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:29:55,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:29:55,877 INFO L82 PathProgramCache]: Analyzing trace with hash -685738480, now seen corresponding path program 41 times [2020-12-22 04:29:55,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:29:55,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912407129] [2020-12-22 04:29:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:29:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:29:57,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912407129] [2020-12-22 04:29:57,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090754766] [2020-12-22 04:29:57,526 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 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 04:31:19,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2020-12-22 04:31:19,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:31:19,018 WARN L261 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 123 conjunts are in the unsatisfiable core [2020-12-22 04:31:19,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:31:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:20,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:31:20,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-22 04:31:20,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095898863] [2020-12-22 04:31:20,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 04:31:20,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:31:20,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 04:31:20,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:31:20,730 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 45 states. [2020-12-22 04:31:22,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:31:22,179 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-12-22 04:31:22,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 04:31:22,180 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 47 [2020-12-22 04:31:22,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:31:22,181 INFO L225 Difference]: With dead ends: 53 [2020-12-22 04:31:22,181 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 04:31:22,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 9 SyntacticMatches, 39 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:31:22,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 04:31:22,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-22 04:31:22,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 04:31:22,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-12-22 04:31:22,185 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-12-22 04:31:22,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:31:22,186 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-12-22 04:31:22,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 04:31:22,186 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-12-22 04:31:22,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:31:22,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:31:22,186 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1] [2020-12-22 04:31:22,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-22 04:31:22,393 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:31:22,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:31:22,394 INFO L82 PathProgramCache]: Analyzing trace with hash 218608971, now seen corresponding path program 42 times [2020-12-22 04:31:22,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:31:22,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148536622] [2020-12-22 04:31:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:31:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:31:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:31:24,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148536622] [2020-12-22 04:31:24,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051247647] [2020-12-22 04:31:24,056 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true