/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-acceleration/functions_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 00:15:12,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 00:15:12,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 00:15:12,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 00:15:12,979 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 00:15:12,987 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 00:15:12,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 00:15:12,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 00:15:12,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 00:15:12,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 00:15:12,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 00:15:12,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 00:15:12,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 00:15:12,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 00:15:12,989 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 00:15:12,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 00:15:12,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 00:15:12,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 00:15:12,990 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 00:15:12,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 00:15:12,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:15:12,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 00:15:12,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 00:15:12,990 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 00:15:12,990 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 00:15:12,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 00:15:12,990 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 00:15:12,990 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 00:15:13,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 00:15:13,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 00:15:13,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 00:15:13,205 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 00:15:13,205 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 00:15:13,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/functions_1-2.c [2022-03-18 00:15:13,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5934da62/d9a54218d6b84c2ab4fb1d43827f9cfe/FLAG90dc74e23 [2022-03-18 00:15:13,580 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 00:15:13,580 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-2.c [2022-03-18 00:15:13,584 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5934da62/d9a54218d6b84c2ab4fb1d43827f9cfe/FLAG90dc74e23 [2022-03-18 00:15:14,021 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5934da62/d9a54218d6b84c2ab4fb1d43827f9cfe [2022-03-18 00:15:14,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 00:15:14,024 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 00:15:14,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 00:15:14,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 00:15:14,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 00:15:14,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:15:14" (1/1) ... [2022-03-18 00:15:14,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f8fc0b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:14, skipping insertion in model container [2022-03-18 00:15:14,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:15:14" (1/1) ... [2022-03-18 00:15:14,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 00:15:14,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 00:15:14,179 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-2.c[325,338] [2022-03-18 00:15:14,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:15:14,191 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 00:15:14,198 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-2.c[325,338] [2022-03-18 00:15:14,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:15:14,207 INFO L208 MainTranslator]: Completed translation [2022-03-18 00:15:14,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:14 WrapperNode [2022-03-18 00:15:14,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 00:15:14,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 00:15:14,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 00:15:14,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 00:15:14,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:14" (1/1) ... [2022-03-18 00:15:14,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:14" (1/1) ... [2022-03-18 00:15:14,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:14" (1/1) ... [2022-03-18 00:15:14,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:14" (1/1) ... [2022-03-18 00:15:14,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:14" (1/1) ... [2022-03-18 00:15:14,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:14" (1/1) ... [2022-03-18 00:15:14,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:14" (1/1) ... [2022-03-18 00:15:14,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 00:15:14,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 00:15:14,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 00:15:14,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 00:15:14,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:14" (1/1) ... [2022-03-18 00:15:14,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:15:14,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:14,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 00:15:14,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 00:15:14,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 00:15:14,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 00:15:14,288 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 00:15:14,288 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 00:15:14,288 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-03-18 00:15:14,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 00:15:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 00:15:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 00:15:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 00:15:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 00:15:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 00:15:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-03-18 00:15:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 00:15:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 00:15:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 00:15:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 00:15:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 00:15:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 00:15:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 00:15:14,334 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 00:15:14,335 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 00:15:14,399 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 00:15:14,403 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 00:15:14,403 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 00:15:14,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:15:14 BoogieIcfgContainer [2022-03-18 00:15:14,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 00:15:14,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 00:15:14,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 00:15:14,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 00:15:14,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:15:14" (1/3) ... [2022-03-18 00:15:14,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f60cbe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:15:14, skipping insertion in model container [2022-03-18 00:15:14,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:15:14" (2/3) ... [2022-03-18 00:15:14,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f60cbe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:15:14, skipping insertion in model container [2022-03-18 00:15:14,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:15:14" (3/3) ... [2022-03-18 00:15:14,410 INFO L111 eAbstractionObserver]: Analyzing ICFG functions_1-2.c [2022-03-18 00:15:14,413 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 00:15:14,413 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 00:15:14,456 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 00:15:14,460 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 00:15:14,461 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 00:15:14,481 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 00:15:14,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 00:15:14,486 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:14,486 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:14,486 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:14,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:14,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1649640916, now seen corresponding path program 1 times [2022-03-18 00:15:14,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:14,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1553688260] [2022-03-18 00:15:14,502 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:15:14,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1649640916, now seen corresponding path program 2 times [2022-03-18 00:15:14,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:14,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93736401] [2022-03-18 00:15:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:14,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:14,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:14,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:14,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93736401] [2022-03-18 00:15:14,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93736401] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:14,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:14,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:15:14,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:14,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1553688260] [2022-03-18 00:15:14,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1553688260] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:14,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:14,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:15:14,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379065852] [2022-03-18 00:15:14,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:14,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 00:15:14,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:14,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 00:15:14,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 00:15:14,631 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:14,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:14,695 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-03-18 00:15:14,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 00:15:14,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 00:15:14,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:14,701 INFO L225 Difference]: With dead ends: 34 [2022-03-18 00:15:14,701 INFO L226 Difference]: Without dead ends: 17 [2022-03-18 00:15:14,702 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 00:15:14,705 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:14,705 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:15:14,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-18 00:15:14,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-18 00:15:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:15:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-03-18 00:15:14,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2022-03-18 00:15:14,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:14,762 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-03-18 00:15:14,762 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:14,762 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-03-18 00:15:14,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 00:15:14,763 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:14,763 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:14,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 00:15:14,763 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:14,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:14,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1655182042, now seen corresponding path program 1 times [2022-03-18 00:15:14,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:14,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [124166377] [2022-03-18 00:15:14,765 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:15:14,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1655182042, now seen corresponding path program 2 times [2022-03-18 00:15:14,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:14,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601705535] [2022-03-18 00:15:14,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:14,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:14,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:14,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:14,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601705535] [2022-03-18 00:15:14,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601705535] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:14,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:14,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:15:14,877 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:14,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [124166377] [2022-03-18 00:15:14,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [124166377] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:14,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:14,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:15:14,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289345888] [2022-03-18 00:15:14,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:14,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 00:15:14,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:14,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 00:15:14,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 00:15:14,879 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:14,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:14,923 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-03-18 00:15:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 00:15:14,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 00:15:14,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:14,926 INFO L225 Difference]: With dead ends: 25 [2022-03-18 00:15:14,926 INFO L226 Difference]: Without dead ends: 20 [2022-03-18 00:15:14,927 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:15:14,928 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:14,929 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:15:14,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-18 00:15:14,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-03-18 00:15:14,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:15:14,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-03-18 00:15:14,938 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2022-03-18 00:15:14,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:14,938 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-03-18 00:15:14,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:15:14,938 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-03-18 00:15:14,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 00:15:14,939 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:14,939 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:14,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 00:15:14,939 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:14,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:14,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1503524740, now seen corresponding path program 1 times [2022-03-18 00:15:14,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:14,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [471392023] [2022-03-18 00:15:15,042 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:15,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1236910030, now seen corresponding path program 1 times [2022-03-18 00:15:15,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:15,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657226322] [2022-03-18 00:15:15,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:15,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:15,078 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:15:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:15,111 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:15:15,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1503524740, now seen corresponding path program 2 times [2022-03-18 00:15:15,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:15,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892452627] [2022-03-18 00:15:15,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:15,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:15,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:15,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:15:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:15,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:15,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:15,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892452627] [2022-03-18 00:15:15,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892452627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:15,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268577291] [2022-03-18 00:15:15,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:15:15,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:15,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:15,260 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:15,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 00:15:15,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:15:15,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:15,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 00:15:15,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:15,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:15:15,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268577291] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:15,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:15,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-18 00:15:15,505 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:15,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [471392023] [2022-03-18 00:15:15,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [471392023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:15,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:15,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:15:15,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355665366] [2022-03-18 00:15:15,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:15,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 00:15:15,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:15,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 00:15:15,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-18 00:15:15,508 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:15:15,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:15,587 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-03-18 00:15:15,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 00:15:15,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-18 00:15:15,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:15,588 INFO L225 Difference]: With dead ends: 28 [2022-03-18 00:15:15,588 INFO L226 Difference]: Without dead ends: 23 [2022-03-18 00:15:15,588 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-18 00:15:15,589 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:15,590 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 36 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:15:15,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-18 00:15:15,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-03-18 00:15:15,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:15:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-03-18 00:15:15,594 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2022-03-18 00:15:15,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:15,595 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-03-18 00:15:15,595 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:15:15,595 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-03-18 00:15:15,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 00:15:15,596 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:15,596 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:15,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:15,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:15,820 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:15,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:15,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1270987934, now seen corresponding path program 3 times [2022-03-18 00:15:15,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:15,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [412743810] [2022-03-18 00:15:15,888 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:15,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1296015374, now seen corresponding path program 1 times [2022-03-18 00:15:15,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:15,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843062248] [2022-03-18 00:15:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:15,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:15,899 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:15:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:15,922 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:15:15,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1270987934, now seen corresponding path program 4 times [2022-03-18 00:15:15,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:15,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412442316] [2022-03-18 00:15:15,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:15,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:16,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:16,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:15:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:16,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:15:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 00:15:16,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:16,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412442316] [2022-03-18 00:15:16,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412442316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:16,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697086153] [2022-03-18 00:15:16,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:15:16,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:16,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:16,096 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:16,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 00:15:16,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:15:16,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:16,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 00:15:16,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 00:15:16,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 00:15:16,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697086153] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:16,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:16,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 17 [2022-03-18 00:15:16,482 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:16,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [412743810] [2022-03-18 00:15:16,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [412743810] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:16,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:16,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 00:15:16,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620932951] [2022-03-18 00:15:16,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:16,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 00:15:16,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:16,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 00:15:16,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-18 00:15:16,488 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:15:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:16,627 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-03-18 00:15:16,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 00:15:16,628 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2022-03-18 00:15:16,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:16,629 INFO L225 Difference]: With dead ends: 31 [2022-03-18 00:15:16,629 INFO L226 Difference]: Without dead ends: 26 [2022-03-18 00:15:16,629 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-03-18 00:15:16,630 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:16,630 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 47 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:15:16,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-18 00:15:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-03-18 00:15:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 00:15:16,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-03-18 00:15:16,635 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 23 [2022-03-18 00:15:16,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:16,635 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-03-18 00:15:16,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:15:16,635 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-03-18 00:15:16,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 00:15:16,636 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:16,636 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:16,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:16,853 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-18 00:15:16,853 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:16,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:16,854 INFO L85 PathProgramCache]: Analyzing trace with hash -371085120, now seen corresponding path program 5 times [2022-03-18 00:15:16,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:16,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [945664254] [2022-03-18 00:15:16,884 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:16,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1355120718, now seen corresponding path program 1 times [2022-03-18 00:15:16,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:16,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116958367] [2022-03-18 00:15:16,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:16,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:16,899 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:15:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:16,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:15:16,920 INFO L85 PathProgramCache]: Analyzing trace with hash -371085120, now seen corresponding path program 6 times [2022-03-18 00:15:16,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:16,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826001929] [2022-03-18 00:15:16,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:16,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:17,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:17,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:15:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:17,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:15:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:17,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:15:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 00:15:17,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:17,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826001929] [2022-03-18 00:15:17,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826001929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:17,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795739588] [2022-03-18 00:15:17,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:15:17,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:17,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:17,092 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:17,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 00:15:17,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 00:15:17,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:17,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 00:15:17,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 00:15:17,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 00:15:17,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795739588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:17,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:17,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12] total 22 [2022-03-18 00:15:17,495 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:17,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [945664254] [2022-03-18 00:15:17,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [945664254] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:17,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:17,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 00:15:17,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458289828] [2022-03-18 00:15:17,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:17,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 00:15:17,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:17,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 00:15:17,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-03-18 00:15:17,497 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 00:15:17,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:17,667 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-18 00:15:17,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 00:15:17,667 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2022-03-18 00:15:17,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:17,668 INFO L225 Difference]: With dead ends: 34 [2022-03-18 00:15:17,668 INFO L226 Difference]: Without dead ends: 29 [2022-03-18 00:15:17,668 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2022-03-18 00:15:17,669 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:17,669 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 58 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:15:17,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-18 00:15:17,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-03-18 00:15:17,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 7 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 00:15:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-18 00:15:17,674 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 29 [2022-03-18 00:15:17,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:17,674 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-18 00:15:17,674 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 00:15:17,674 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-18 00:15:17,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 00:15:17,675 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:17,675 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:17,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:17,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:17,887 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:17,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:17,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1928781922, now seen corresponding path program 7 times [2022-03-18 00:15:17,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:17,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [170884022] [2022-03-18 00:15:17,918 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:17,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1414226062, now seen corresponding path program 1 times [2022-03-18 00:15:17,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:17,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411934137] [2022-03-18 00:15:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:17,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:17,925 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:15:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:17,935 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:15:17,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1928781922, now seen corresponding path program 8 times [2022-03-18 00:15:17,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:17,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005510750] [2022-03-18 00:15:17,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:17,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:18,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:18,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:15:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:18,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:15:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:18,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:15:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:18,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:15:18,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-18 00:15:18,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:18,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005510750] [2022-03-18 00:15:18,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005510750] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:18,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105874977] [2022-03-18 00:15:18,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:15:18,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:18,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:18,088 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:18,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 00:15:18,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:15:18,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:18,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 00:15:18,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-18 00:15:18,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 00:15:18,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105874977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:18,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:18,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 15] total 27 [2022-03-18 00:15:18,634 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:18,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [170884022] [2022-03-18 00:15:18,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [170884022] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:18,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:18,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 00:15:18,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607655826] [2022-03-18 00:15:18,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:18,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 00:15:18,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:18,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 00:15:18,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-03-18 00:15:18,635 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 00:15:18,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:18,897 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-03-18 00:15:18,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 00:15:18,897 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 35 [2022-03-18 00:15:18,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:18,898 INFO L225 Difference]: With dead ends: 37 [2022-03-18 00:15:18,898 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 00:15:18,899 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 00:15:18,899 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:18,899 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 69 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:15:18,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 00:15:18,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-03-18 00:15:18,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 00:15:18,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-03-18 00:15:18,905 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 35 [2022-03-18 00:15:18,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:18,905 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-03-18 00:15:18,905 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 8 states have internal predecessors, (17), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 00:15:18,905 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-03-18 00:15:18,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 00:15:18,906 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:18,906 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:18,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:19,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:19,124 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:19,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:19,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1005752324, now seen corresponding path program 9 times [2022-03-18 00:15:19,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:19,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1019475733] [2022-03-18 00:15:19,158 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:19,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1473331406, now seen corresponding path program 1 times [2022-03-18 00:15:19,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:19,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233596155] [2022-03-18 00:15:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:19,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:19,165 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:15:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:19,171 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:15:19,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1005752324, now seen corresponding path program 10 times [2022-03-18 00:15:19,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:19,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938604338] [2022-03-18 00:15:19,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:19,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:19,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:19,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:15:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:19,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:15:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:19,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:15:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:19,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:15:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:19,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:15:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 00:15:19,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:19,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938604338] [2022-03-18 00:15:19,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938604338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:19,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920870962] [2022-03-18 00:15:19,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:15:19,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:19,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:19,432 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:19,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 00:15:19,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:15:19,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:19,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-18 00:15:19,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 00:15:19,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-18 00:15:20,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920870962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:20,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:20,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 18] total 32 [2022-03-18 00:15:20,155 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:20,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1019475733] [2022-03-18 00:15:20,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1019475733] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:20,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:20,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 00:15:20,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568438889] [2022-03-18 00:15:20,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:20,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 00:15:20,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:20,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 00:15:20,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-03-18 00:15:20,156 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 00:15:20,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:20,457 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-03-18 00:15:20,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 00:15:20,458 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2022-03-18 00:15:20,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:20,458 INFO L225 Difference]: With dead ends: 40 [2022-03-18 00:15:20,458 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 00:15:20,459 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=313, Invalid=1579, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 00:15:20,460 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:20,460 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 70 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:15:20,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 00:15:20,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-03-18 00:15:20,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 00:15:20,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-03-18 00:15:20,465 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 41 [2022-03-18 00:15:20,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:20,465 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-03-18 00:15:20,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 00:15:20,466 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-03-18 00:15:20,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 00:15:20,466 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:20,466 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:20,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:20,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10,SelfDestructingSolverStorable11 [2022-03-18 00:15:20,683 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:20,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:20,684 INFO L85 PathProgramCache]: Analyzing trace with hash 119505370, now seen corresponding path program 11 times [2022-03-18 00:15:20,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:20,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1922160638] [2022-03-18 00:15:20,710 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:20,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1532436750, now seen corresponding path program 1 times [2022-03-18 00:15:20,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:20,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379363197] [2022-03-18 00:15:20,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:20,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:20,726 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:15:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:20,731 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:15:20,731 INFO L85 PathProgramCache]: Analyzing trace with hash 119505370, now seen corresponding path program 12 times [2022-03-18 00:15:20,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:20,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580301369] [2022-03-18 00:15:20,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:20,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:20,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:20,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:15:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:20,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:15:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:20,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:15:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:20,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:15:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:20,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:15:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:20,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:15:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 00:15:20,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:20,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580301369] [2022-03-18 00:15:20,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580301369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:20,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032961674] [2022-03-18 00:15:20,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:15:20,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:20,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:21,008 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:21,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 00:15:21,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:15:21,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:21,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 00:15:21,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 00:15:21,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 00:15:21,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032961674] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:21,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:21,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 21] total 37 [2022-03-18 00:15:21,976 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:21,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1922160638] [2022-03-18 00:15:21,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1922160638] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:21,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:21,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 00:15:21,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45166305] [2022-03-18 00:15:21,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:21,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 00:15:21,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:21,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 00:15:21,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 00:15:21,978 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 10 states have internal predecessors, (21), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 00:15:22,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:22,396 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-03-18 00:15:22,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 00:15:22,396 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 10 states have internal predecessors, (21), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 47 [2022-03-18 00:15:22,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:22,397 INFO L225 Difference]: With dead ends: 43 [2022-03-18 00:15:22,397 INFO L226 Difference]: Without dead ends: 38 [2022-03-18 00:15:22,398 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=401, Invalid=2149, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 00:15:22,398 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:22,398 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 81 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:22,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-18 00:15:22,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-03-18 00:15:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 00:15:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-03-18 00:15:22,405 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 47 [2022-03-18 00:15:22,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:22,405 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-03-18 00:15:22,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 10 states have internal predecessors, (21), 8 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 00:15:22,405 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-03-18 00:15:22,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 00:15:22,406 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:22,406 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:22,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:22,613 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:22,614 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:22,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:22,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1581790520, now seen corresponding path program 13 times [2022-03-18 00:15:22,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:22,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [60191066] [2022-03-18 00:15:22,645 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:22,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1591542094, now seen corresponding path program 1 times [2022-03-18 00:15:22,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:22,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910750771] [2022-03-18 00:15:22,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:22,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:22,666 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:15:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:22,671 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:15:22,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1581790520, now seen corresponding path program 14 times [2022-03-18 00:15:22,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:22,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113241211] [2022-03-18 00:15:22,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:22,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:22,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:22,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:15:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:22,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:15:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:22,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:15:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:22,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:15:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:22,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:15:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:22,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:15:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:22,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:15:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-18 00:15:22,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:22,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113241211] [2022-03-18 00:15:22,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113241211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:22,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872458186] [2022-03-18 00:15:22,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:15:22,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:22,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:22,948 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:22,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 00:15:22,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:15:22,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:23,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-18 00:15:23,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-18 00:15:23,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-18 00:15:24,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872458186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:24,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:24,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 24] total 42 [2022-03-18 00:15:24,131 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:24,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [60191066] [2022-03-18 00:15:24,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [60191066] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:24,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:24,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 00:15:24,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054247178] [2022-03-18 00:15:24,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:24,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 00:15:24,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:24,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 00:15:24,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1505, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 00:15:24,132 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 00:15:24,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:24,635 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-03-18 00:15:24,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 00:15:24,643 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 53 [2022-03-18 00:15:24,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:24,644 INFO L225 Difference]: With dead ends: 46 [2022-03-18 00:15:24,644 INFO L226 Difference]: Without dead ends: 41 [2022-03-18 00:15:24,645 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=499, Invalid=2807, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 00:15:24,645 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:24,645 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 102 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:24,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-18 00:15:24,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-03-18 00:15:24,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 00:15:24,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-03-18 00:15:24,661 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 53 [2022-03-18 00:15:24,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:24,661 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-03-18 00:15:24,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 11 states have internal predecessors, (23), 9 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 00:15:24,662 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-03-18 00:15:24,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 00:15:24,662 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:24,662 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:24,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:24,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:24,879 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:24,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:24,880 INFO L85 PathProgramCache]: Analyzing trace with hash 526936598, now seen corresponding path program 15 times [2022-03-18 00:15:24,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:24,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1217684923] [2022-03-18 00:15:24,903 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:24,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1650647438, now seen corresponding path program 1 times [2022-03-18 00:15:24,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:24,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593455447] [2022-03-18 00:15:24,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:24,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:24,908 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:15:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:24,912 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:15:24,912 INFO L85 PathProgramCache]: Analyzing trace with hash 526936598, now seen corresponding path program 16 times [2022-03-18 00:15:24,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:24,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472853499] [2022-03-18 00:15:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:24,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:25,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:25,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:15:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:25,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:15:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:25,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:15:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:25,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:15:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:25,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:15:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:25,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:15:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:25,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:15:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:25,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:15:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 00:15:25,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:25,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472853499] [2022-03-18 00:15:25,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472853499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:25,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729712436] [2022-03-18 00:15:25,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:15:25,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:25,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:25,187 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:25,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 00:15:25,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:15:25,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:25,251 WARN L261 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-18 00:15:25,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 00:15:25,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 00:15:26,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729712436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:26,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:26,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 27] total 47 [2022-03-18 00:15:26,692 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:26,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1217684923] [2022-03-18 00:15:26,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1217684923] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:26,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:26,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 00:15:26,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630967742] [2022-03-18 00:15:26,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:26,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 00:15:26,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:26,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 00:15:26,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1900, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 00:15:26,694 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 12 states have internal predecessors, (25), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 00:15:27,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:27,295 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-03-18 00:15:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 00:15:27,296 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 12 states have internal predecessors, (25), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 59 [2022-03-18 00:15:27,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:27,297 INFO L225 Difference]: With dead ends: 49 [2022-03-18 00:15:27,297 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 00:15:27,298 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 102 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=607, Invalid=3553, Unknown=0, NotChecked=0, Total=4160 [2022-03-18 00:15:27,299 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:27,299 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 98 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:27,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 00:15:27,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-03-18 00:15:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 00:15:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-18 00:15:27,304 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 59 [2022-03-18 00:15:27,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:27,304 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-18 00:15:27,305 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 12 states have internal predecessors, (25), 10 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 00:15:27,305 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-18 00:15:27,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 00:15:27,306 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:27,306 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:27,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:27,508 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16,SelfDestructingSolverStorable17 [2022-03-18 00:15:27,509 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:27,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:27,509 INFO L85 PathProgramCache]: Analyzing trace with hash 741933172, now seen corresponding path program 17 times [2022-03-18 00:15:27,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:27,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [265764127] [2022-03-18 00:15:27,535 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:27,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1709752782, now seen corresponding path program 1 times [2022-03-18 00:15:27,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:27,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810102546] [2022-03-18 00:15:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:27,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:27,548 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:15:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:27,551 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:15:27,552 INFO L85 PathProgramCache]: Analyzing trace with hash 741933172, now seen corresponding path program 18 times [2022-03-18 00:15:27,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:27,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069145906] [2022-03-18 00:15:27,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:27,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:27,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:27,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:15:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:27,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:15:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:27,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:15:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:27,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:15:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:27,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:15:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:27,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:15:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:27,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:15:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:27,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:15:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:27,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 00:15:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-18 00:15:27,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:27,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069145906] [2022-03-18 00:15:27,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069145906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:27,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308887703] [2022-03-18 00:15:27,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:15:27,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:27,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:27,917 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:27,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 00:15:27,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-18 00:15:27,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:27,997 WARN L261 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-18 00:15:27,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-18 00:15:28,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 00:15:29,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308887703] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:29,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:29,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 30] total 52 [2022-03-18 00:15:29,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:29,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [265764127] [2022-03-18 00:15:29,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [265764127] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:29,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:29,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 00:15:29,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370829401] [2022-03-18 00:15:29,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:29,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 00:15:29,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:29,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 00:15:29,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=2341, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 00:15:29,512 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 13 states have internal predecessors, (27), 11 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 00:15:30,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:30,050 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2022-03-18 00:15:30,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 00:15:30,051 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 13 states have internal predecessors, (27), 11 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 65 [2022-03-18 00:15:30,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:30,051 INFO L225 Difference]: With dead ends: 52 [2022-03-18 00:15:30,051 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 00:15:30,053 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 112 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=725, Invalid=4387, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 00:15:30,053 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:30,053 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 79 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:15:30,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 00:15:30,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-03-18 00:15:30,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 13 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 00:15:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-03-18 00:15:30,059 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 65 [2022-03-18 00:15:30,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:30,059 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-03-18 00:15:30,059 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 13 states have internal predecessors, (27), 11 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 00:15:30,059 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-03-18 00:15:30,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 00:15:30,060 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:30,060 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:30,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-18 00:15:30,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:30,275 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:30,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:30,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1337272238, now seen corresponding path program 19 times [2022-03-18 00:15:30,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:30,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1272326703] [2022-03-18 00:15:30,304 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:30,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1768858126, now seen corresponding path program 1 times [2022-03-18 00:15:30,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:30,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532486529] [2022-03-18 00:15:30,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:30,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:30,309 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:15:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:30,313 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:15:30,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1337272238, now seen corresponding path program 20 times [2022-03-18 00:15:30,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:30,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802932530] [2022-03-18 00:15:30,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:30,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:30,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:30,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:15:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:30,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:15:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:30,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:15:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:30,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:15:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:30,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:15:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:30,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:15:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:30,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:15:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:30,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:15:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:30,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 00:15:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:30,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 00:15:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-03-18 00:15:30,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:30,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802932530] [2022-03-18 00:15:30,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802932530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:30,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711696383] [2022-03-18 00:15:30,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:15:30,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:30,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:30,668 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:30,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 00:15:30,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:15:30,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:30,718 WARN L261 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-18 00:15:30,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-03-18 00:15:31,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 00:15:33,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711696383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:33,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:33,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 33] total 57 [2022-03-18 00:15:33,129 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:33,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1272326703] [2022-03-18 00:15:33,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1272326703] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:33,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:33,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 00:15:33,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502133769] [2022-03-18 00:15:33,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:33,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 00:15:33,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:33,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 00:15:33,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=2828, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 00:15:33,131 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 14 states have internal predecessors, (29), 12 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 00:15:33,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:33,882 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-03-18 00:15:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 00:15:33,883 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 14 states have internal predecessors, (29), 12 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 71 [2022-03-18 00:15:33,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:33,884 INFO L225 Difference]: With dead ends: 55 [2022-03-18 00:15:33,884 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 00:15:33,885 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 122 SyntacticMatches, 10 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=853, Invalid=5309, Unknown=0, NotChecked=0, Total=6162 [2022-03-18 00:15:33,886 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:33,886 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 90 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:15:33,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 00:15:33,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-03-18 00:15:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 14 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 00:15:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-03-18 00:15:33,895 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 71 [2022-03-18 00:15:33,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:33,895 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-03-18 00:15:33,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 14 states have internal predecessors, (29), 12 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 00:15:33,895 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-03-18 00:15:33,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-18 00:15:33,896 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:33,896 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:33,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:34,101 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20,SelfDestructingSolverStorable21 [2022-03-18 00:15:34,102 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:34,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:34,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1594282416, now seen corresponding path program 21 times [2022-03-18 00:15:34,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:34,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2145220689] [2022-03-18 00:15:34,129 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:34,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1827963470, now seen corresponding path program 1 times [2022-03-18 00:15:34,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:34,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863130935] [2022-03-18 00:15:34,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:34,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:34,134 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:15:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:34,137 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:15:34,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1594282416, now seen corresponding path program 22 times [2022-03-18 00:15:34,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:34,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272052609] [2022-03-18 00:15:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:34,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:34,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:34,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:15:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:34,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:15:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:34,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:15:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:34,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:15:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:34,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:15:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:34,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:15:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:34,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:15:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:34,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:15:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:34,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 00:15:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:34,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 00:15:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:34,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-18 00:15:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-03-18 00:15:34,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:34,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272052609] [2022-03-18 00:15:34,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272052609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:34,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770497195] [2022-03-18 00:15:34,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:15:34,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:34,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:34,543 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:34,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 00:15:34,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:15:34,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:34,604 WARN L261 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-18 00:15:34,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-03-18 00:15:35,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-18 00:15:37,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770497195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:37,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:37,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 36] total 62 [2022-03-18 00:15:37,270 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:37,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2145220689] [2022-03-18 00:15:37,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2145220689] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:37,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:37,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-18 00:15:37,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587077326] [2022-03-18 00:15:37,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:37,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 00:15:37,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:37,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 00:15:37,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=3361, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 00:15:37,272 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 15 states have internal predecessors, (31), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 00:15:38,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:38,310 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2022-03-18 00:15:38,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 00:15:38,311 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 15 states have internal predecessors, (31), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 77 [2022-03-18 00:15:38,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:38,312 INFO L225 Difference]: With dead ends: 58 [2022-03-18 00:15:38,312 INFO L226 Difference]: Without dead ends: 53 [2022-03-18 00:15:38,313 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 132 SyntacticMatches, 11 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=991, Invalid=6319, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 00:15:38,313 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 34 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:38,314 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 116 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:15:38,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-18 00:15:38,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-03-18 00:15:38,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 15 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 00:15:38,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2022-03-18 00:15:38,321 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 77 [2022-03-18 00:15:38,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:38,322 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2022-03-18 00:15:38,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 15 states have internal predecessors, (31), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 00:15:38,322 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2022-03-18 00:15:38,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-18 00:15:38,322 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:38,323 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:38,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:38,540 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22,SelfDestructingSolverStorable23 [2022-03-18 00:15:38,540 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:38,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:38,540 INFO L85 PathProgramCache]: Analyzing trace with hash 833473678, now seen corresponding path program 23 times [2022-03-18 00:15:38,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:38,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [466983073] [2022-03-18 00:15:38,566 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:38,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1887068814, now seen corresponding path program 1 times [2022-03-18 00:15:38,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:38,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745281350] [2022-03-18 00:15:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:38,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:38,571 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:15:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:38,575 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:15:38,575 INFO L85 PathProgramCache]: Analyzing trace with hash 833473678, now seen corresponding path program 24 times [2022-03-18 00:15:38,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:38,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337180265] [2022-03-18 00:15:38,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:38,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:38,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:38,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:15:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:38,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:15:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:38,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:15:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:38,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:15:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:38,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:15:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:39,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:15:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:39,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:15:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:39,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:15:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:39,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 00:15:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:39,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 00:15:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:39,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-18 00:15:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:39,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-18 00:15:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-18 00:15:39,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:39,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337180265] [2022-03-18 00:15:39,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337180265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:39,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102698729] [2022-03-18 00:15:39,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:15:39,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:39,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:39,058 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:39,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 00:15:39,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-18 00:15:39,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:39,231 WARN L261 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 123 conjunts are in the unsatisfiable core [2022-03-18 00:15:39,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-03-18 00:15:39,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-18 00:15:42,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102698729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:42,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:42,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 39] total 67 [2022-03-18 00:15:42,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:42,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [466983073] [2022-03-18 00:15:42,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [466983073] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:42,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:42,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-18 00:15:42,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167863126] [2022-03-18 00:15:42,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:42,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 00:15:42,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:42,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 00:15:42,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=3940, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 00:15:42,911 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 16 states have internal predecessors, (33), 14 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 00:15:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:43,892 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-03-18 00:15:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 00:15:43,892 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 16 states have internal predecessors, (33), 14 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 83 [2022-03-18 00:15:43,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:43,893 INFO L225 Difference]: With dead ends: 61 [2022-03-18 00:15:43,893 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 00:15:43,895 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 142 SyntacticMatches, 12 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1139, Invalid=7417, Unknown=0, NotChecked=0, Total=8556 [2022-03-18 00:15:43,895 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 36 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:43,896 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 117 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:15:43,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 00:15:43,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-03-18 00:15:43,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 16 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 00:15:43,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2022-03-18 00:15:43,903 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 83 [2022-03-18 00:15:43,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:43,903 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2022-03-18 00:15:43,903 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 16 states have internal predecessors, (33), 14 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 00:15:43,903 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2022-03-18 00:15:43,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-18 00:15:43,904 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:43,904 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:43,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-18 00:15:44,117 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24,SelfDestructingSolverStorable25 [2022-03-18 00:15:44,118 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:44,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:44,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1520916244, now seen corresponding path program 25 times [2022-03-18 00:15:44,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:44,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1522072842] [2022-03-18 00:15:44,146 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:44,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1946174158, now seen corresponding path program 1 times [2022-03-18 00:15:44,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:44,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105512883] [2022-03-18 00:15:44,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:44,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:44,164 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:15:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:44,168 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:15:44,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1520916244, now seen corresponding path program 26 times [2022-03-18 00:15:44,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:44,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915082711] [2022-03-18 00:15:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:44,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:44,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:44,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:15:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:44,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:15:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:44,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:15:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:44,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:15:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:44,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:15:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:44,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:15:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:44,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:15:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:44,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:15:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:44,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 00:15:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:44,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 00:15:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:44,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-18 00:15:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:44,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-18 00:15:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:44,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-18 00:15:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-03-18 00:15:44,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:44,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915082711] [2022-03-18 00:15:44,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915082711] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:44,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545904360] [2022-03-18 00:15:44,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:15:44,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:44,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:44,756 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:44,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 00:15:44,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:15:44,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:44,886 WARN L261 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 133 conjunts are in the unsatisfiable core [2022-03-18 00:15:44,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-03-18 00:15:45,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-18 00:15:49,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545904360] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:49,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:49,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 42] total 72 [2022-03-18 00:15:49,723 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:49,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1522072842] [2022-03-18 00:15:49,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1522072842] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:49,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:49,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-18 00:15:49,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529770754] [2022-03-18 00:15:49,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:49,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 00:15:49,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:49,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 00:15:49,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=4565, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 00:15:49,725 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 17 states have internal predecessors, (35), 15 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 00:15:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:51,026 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2022-03-18 00:15:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 00:15:51,027 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 17 states have internal predecessors, (35), 15 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 89 [2022-03-18 00:15:51,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:51,028 INFO L225 Difference]: With dead ends: 64 [2022-03-18 00:15:51,028 INFO L226 Difference]: Without dead ends: 59 [2022-03-18 00:15:51,030 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 152 SyntacticMatches, 13 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1297, Invalid=8603, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 00:15:51,032 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 38 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:51,032 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 108 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:15:51,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-18 00:15:51,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2022-03-18 00:15:51,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 17 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 00:15:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2022-03-18 00:15:51,043 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 89 [2022-03-18 00:15:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:51,043 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2022-03-18 00:15:51,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 17 states have internal predecessors, (35), 15 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 00:15:51,044 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2022-03-18 00:15:51,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-18 00:15:51,045 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:51,045 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:51,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:51,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26,SelfDestructingSolverStorable27 [2022-03-18 00:15:51,263 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:51,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:51,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2029536970, now seen corresponding path program 27 times [2022-03-18 00:15:51,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:51,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [177983402] [2022-03-18 00:15:51,280 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:51,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2005279502, now seen corresponding path program 1 times [2022-03-18 00:15:51,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:51,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270637231] [2022-03-18 00:15:51,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:51,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:51,285 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:15:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:51,288 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:15:51,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2029536970, now seen corresponding path program 28 times [2022-03-18 00:15:51,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:51,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518848409] [2022-03-18 00:15:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:51,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:51,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:51,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:15:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:51,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:15:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:51,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:15:51,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:51,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:15:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:51,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:15:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:51,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:15:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:51,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:15:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:51,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:15:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:51,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 00:15:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:51,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 00:15:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:52,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-18 00:15:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:52,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-18 00:15:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:52,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-18 00:15:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:52,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-18 00:15:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-03-18 00:15:52,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:52,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518848409] [2022-03-18 00:15:52,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518848409] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:52,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705949594] [2022-03-18 00:15:52,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:15:52,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:52,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:52,060 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:52,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 00:15:52,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:15:52,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:15:52,150 WARN L261 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 143 conjunts are in the unsatisfiable core [2022-03-18 00:15:52,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:15:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-03-18 00:15:52,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:15:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-18 00:15:57,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705949594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:15:57,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:15:57,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 45] total 77 [2022-03-18 00:15:57,281 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:15:57,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [177983402] [2022-03-18 00:15:57,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [177983402] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:15:57,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:15:57,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-18 00:15:57,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880872468] [2022-03-18 00:15:57,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:15:57,282 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 00:15:57,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:57,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 00:15:57,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=5236, Unknown=0, NotChecked=0, Total=5852 [2022-03-18 00:15:57,283 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 18 states have internal predecessors, (37), 16 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 00:15:58,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:15:58,944 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2022-03-18 00:15:58,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-18 00:15:58,945 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 18 states have internal predecessors, (37), 16 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 95 [2022-03-18 00:15:58,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:15:58,945 INFO L225 Difference]: With dead ends: 67 [2022-03-18 00:15:58,946 INFO L226 Difference]: Without dead ends: 62 [2022-03-18 00:15:58,946 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 162 SyntacticMatches, 14 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1465, Invalid=9877, Unknown=0, NotChecked=0, Total=11342 [2022-03-18 00:15:58,947 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 40 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:15:58,947 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 154 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 00:15:58,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-18 00:15:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-03-18 00:15:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 18 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 00:15:58,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2022-03-18 00:15:58,956 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 95 [2022-03-18 00:15:58,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:15:58,956 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2022-03-18 00:15:58,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 18 states have internal predecessors, (37), 16 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 00:15:58,956 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2022-03-18 00:15:58,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-18 00:15:58,957 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:15:58,957 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:15:58,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 00:15:59,161 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,SelfDestructingSolverStorable28,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:59,162 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:15:59,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:15:59,162 INFO L85 PathProgramCache]: Analyzing trace with hash -346716632, now seen corresponding path program 29 times [2022-03-18 00:15:59,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:15:59,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [26390301] [2022-03-18 00:15:59,190 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:15:59,190 INFO L85 PathProgramCache]: Analyzing trace with hash 2064384846, now seen corresponding path program 1 times [2022-03-18 00:15:59,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:59,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448331917] [2022-03-18 00:15:59,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:59,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:59,202 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:15:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:15:59,219 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:15:59,220 INFO L85 PathProgramCache]: Analyzing trace with hash -346716632, now seen corresponding path program 30 times [2022-03-18 00:15:59,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:15:59,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147326429] [2022-03-18 00:15:59,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:15:59,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:15:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:59,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:15:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:59,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:15:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:59,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:15:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:59,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:15:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:59,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:15:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:59,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:15:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:59,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:15:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:59,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:15:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:59,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:15:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:59,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 00:15:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:59,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 00:15:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:59,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-18 00:15:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:59,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-18 00:15:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:59,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-18 00:15:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:59,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-18 00:15:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:59,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-18 00:15:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:15:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-18 00:15:59,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:15:59,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147326429] [2022-03-18 00:15:59,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147326429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:15:59,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082576695] [2022-03-18 00:15:59,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:15:59,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:15:59,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:15:59,876 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:15:59,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 00:16:00,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-18 00:16:00,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:16:00,262 WARN L261 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 154 conjunts are in the unsatisfiable core [2022-03-18 00:16:00,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:16:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-18 00:16:01,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:16:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-18 00:16:11,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082576695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:16:11,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:16:11,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 49] total 83 [2022-03-18 00:16:11,416 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:16:11,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [26390301] [2022-03-18 00:16:11,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [26390301] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:16:11,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:16:11,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-18 00:16:11,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084669537] [2022-03-18 00:16:11,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:16:11,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 00:16:11,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:11,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 00:16:11,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=6097, Unknown=0, NotChecked=0, Total=6806 [2022-03-18 00:16:11,418 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 19 states have internal predecessors, (39), 17 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 00:16:13,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:16:13,888 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2022-03-18 00:16:13,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 00:16:13,889 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 19 states have internal predecessors, (39), 17 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 101 [2022-03-18 00:16:13,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:16:13,890 INFO L225 Difference]: With dead ends: 70 [2022-03-18 00:16:13,890 INFO L226 Difference]: Without dead ends: 65 [2022-03-18 00:16:13,891 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 171 SyntacticMatches, 15 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=1694, Invalid=11416, Unknown=0, NotChecked=0, Total=13110 [2022-03-18 00:16:13,891 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2043 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 2130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 00:16:13,892 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 160 Invalid, 2130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2043 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 00:16:13,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-18 00:16:13,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-03-18 00:16:13,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 19 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 00:16:13,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2022-03-18 00:16:13,903 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 101 [2022-03-18 00:16:13,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:16:13,905 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2022-03-18 00:16:13,905 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 19 states have internal predecessors, (39), 17 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 00:16:13,905 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2022-03-18 00:16:13,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-18 00:16:13,906 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:16:13,906 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:16:13,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 00:16:14,106 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:14,106 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:16:14,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:16:14,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2031175430, now seen corresponding path program 31 times [2022-03-18 00:16:14,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:14,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [984975057] [2022-03-18 00:16:14,133 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:16:14,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2123490190, now seen corresponding path program 1 times [2022-03-18 00:16:14,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:16:14,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641067298] [2022-03-18 00:16:14,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:16:14,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:16:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:16:14,138 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:16:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:16:14,146 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:16:14,146 INFO L85 PathProgramCache]: Analyzing trace with hash 2031175430, now seen corresponding path program 32 times [2022-03-18 00:16:14,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:16:14,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836624464] [2022-03-18 00:16:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:16:14,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:16:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:14,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:16:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:14,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:16:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:14,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:16:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:14,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:16:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:14,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:16:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:14,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:16:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:14,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:16:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:14,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:16:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:14,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:16:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:14,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 00:16:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:14,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 00:16:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:14,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-18 00:16:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:14,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-18 00:16:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:14,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-18 00:16:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:14,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-18 00:16:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:14,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-18 00:16:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:14,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-18 00:16:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-18 00:16:14,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:16:14,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836624464] [2022-03-18 00:16:14,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836624464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:16:14,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014723849] [2022-03-18 00:16:14,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:16:14,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:14,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:16:14,903 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:16:14,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 00:16:14,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:16:14,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:16:14,972 WARN L261 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 163 conjunts are in the unsatisfiable core [2022-03-18 00:16:14,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:16:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-18 00:16:15,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:16:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-18 00:16:24,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014723849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:16:24,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:16:24,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 51] total 87 [2022-03-18 00:16:24,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:16:24,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [984975057] [2022-03-18 00:16:24,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [984975057] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:16:24,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:16:24,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-18 00:16:24,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308061518] [2022-03-18 00:16:24,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:16:24,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 00:16:24,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:24,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 00:16:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=766, Invalid=6716, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 00:16:24,789 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 20 states have internal predecessors, (41), 18 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 00:16:27,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:16:27,197 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2022-03-18 00:16:27,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-18 00:16:27,199 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 20 states have internal predecessors, (41), 18 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 107 [2022-03-18 00:16:27,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:16:27,200 INFO L225 Difference]: With dead ends: 73 [2022-03-18 00:16:27,200 INFO L226 Difference]: Without dead ends: 68 [2022-03-18 00:16:27,201 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 182 SyntacticMatches, 16 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1831, Invalid=12689, Unknown=0, NotChecked=0, Total=14520 [2022-03-18 00:16:27,202 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 44 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 00:16:27,202 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 141 Invalid, 2263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 00:16:27,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-18 00:16:27,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-03-18 00:16:27,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 20 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 00:16:27,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2022-03-18 00:16:27,212 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 107 [2022-03-18 00:16:27,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:16:27,214 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2022-03-18 00:16:27,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 20 states have internal predecessors, (41), 18 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 00:16:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2022-03-18 00:16:27,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-18 00:16:27,215 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:16:27,215 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:16:27,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 00:16:27,432 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32,SelfDestructingSolverStorable33 [2022-03-18 00:16:27,433 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:16:27,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:16:27,433 INFO L85 PathProgramCache]: Analyzing trace with hash 446982500, now seen corresponding path program 33 times [2022-03-18 00:16:27,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:27,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [175048718] [2022-03-18 00:16:27,460 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:16:27,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2112371762, now seen corresponding path program 1 times [2022-03-18 00:16:27,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:16:27,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927891700] [2022-03-18 00:16:27,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:16:27,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:16:27,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:16:27,465 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:16:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:16:27,468 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:16:27,468 INFO L85 PathProgramCache]: Analyzing trace with hash 446982500, now seen corresponding path program 34 times [2022-03-18 00:16:27,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:16:27,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146713458] [2022-03-18 00:16:27,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:16:27,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:16:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:28,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:16:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:28,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:16:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:28,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:16:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:28,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:16:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:28,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:16:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:28,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:16:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:28,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:16:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:28,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:16:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:28,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:16:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:28,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 00:16:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:28,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 00:16:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:28,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-18 00:16:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:28,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-18 00:16:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:28,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-18 00:16:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:28,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-18 00:16:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:28,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-18 00:16:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:28,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-18 00:16:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:28,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-18 00:16:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-03-18 00:16:28,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:16:28,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146713458] [2022-03-18 00:16:28,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146713458] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:16:28,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104487464] [2022-03-18 00:16:28,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:16:28,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:28,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:16:28,300 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:16:28,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 00:16:28,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:16:28,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:16:28,373 WARN L261 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 173 conjunts are in the unsatisfiable core [2022-03-18 00:16:28,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:16:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-03-18 00:16:29,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:16:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-18 00:16:40,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104487464] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:16:40,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:16:40,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 54] total 92 [2022-03-18 00:16:40,953 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:16:40,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [175048718] [2022-03-18 00:16:40,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [175048718] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:16:40,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:16:40,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-18 00:16:40,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85844845] [2022-03-18 00:16:40,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:16:40,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 00:16:40,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:40,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 00:16:40,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=847, Invalid=7525, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 00:16:40,954 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 21 states have internal predecessors, (43), 19 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 00:16:43,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:16:43,822 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2022-03-18 00:16:43,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 00:16:43,823 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 21 states have internal predecessors, (43), 19 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 113 [2022-03-18 00:16:43,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:16:43,824 INFO L225 Difference]: With dead ends: 76 [2022-03-18 00:16:43,824 INFO L226 Difference]: Without dead ends: 71 [2022-03-18 00:16:43,826 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 192 SyntacticMatches, 17 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=2029, Invalid=14227, Unknown=0, NotChecked=0, Total=16256 [2022-03-18 00:16:43,826 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 46 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 2691 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 2784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 00:16:43,826 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 202 Invalid, 2784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2691 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 00:16:43,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-18 00:16:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-03-18 00:16:43,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 21 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-18 00:16:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2022-03-18 00:16:43,835 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 113 [2022-03-18 00:16:43,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:16:43,836 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2022-03-18 00:16:43,836 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 21 states have internal predecessors, (43), 19 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 00:16:43,836 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2022-03-18 00:16:43,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-18 00:16:43,836 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:16:43,836 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:16:43,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 00:16:44,054 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:44,055 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:16:44,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:16:44,055 INFO L85 PathProgramCache]: Analyzing trace with hash 39832898, now seen corresponding path program 35 times [2022-03-18 00:16:44,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:44,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1058295658] [2022-03-18 00:16:44,082 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:16:44,083 INFO L85 PathProgramCache]: Analyzing trace with hash -2053266418, now seen corresponding path program 1 times [2022-03-18 00:16:44,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:16:44,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371011205] [2022-03-18 00:16:44,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:16:44,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:16:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:16:44,087 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:16:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:16:44,090 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:16:44,090 INFO L85 PathProgramCache]: Analyzing trace with hash 39832898, now seen corresponding path program 36 times [2022-03-18 00:16:44,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:16:44,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225915400] [2022-03-18 00:16:44,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:16:44,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:16:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:16:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:16:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:16:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:16:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:16:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:16:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:16:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:16:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:16:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 00:16:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 00:16:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-18 00:16:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-18 00:16:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-18 00:16:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-18 00:16:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-18 00:16:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-18 00:16:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-18 00:16:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-18 00:16:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:16:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-03-18 00:16:44,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:16:44,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225915400] [2022-03-18 00:16:44,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225915400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:16:44,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999058974] [2022-03-18 00:16:44,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:16:44,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:16:44,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:16:44,967 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:16:44,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 00:16:45,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-18 00:16:45,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:16:45,447 WARN L261 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 189 conjunts are in the unsatisfiable core [2022-03-18 00:16:45,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:16:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-03-18 00:16:46,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:16:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-03-18 00:16:58,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999058974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:16:58,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:16:58,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 60] total 100 [2022-03-18 00:16:58,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:16:58,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1058295658] [2022-03-18 00:16:58,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1058295658] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:16:58,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:16:58,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-18 00:16:58,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750178803] [2022-03-18 00:16:58,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:16:58,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 00:16:58,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:16:58,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 00:16:58,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=957, Invalid=8943, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 00:16:58,361 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 22 states have internal predecessors, (45), 20 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-18 00:17:01,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:17:01,508 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2022-03-18 00:17:01,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-18 00:17:01,510 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 22 states have internal predecessors, (45), 20 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 119 [2022-03-18 00:17:01,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:17:01,511 INFO L225 Difference]: With dead ends: 79 [2022-03-18 00:17:01,511 INFO L226 Difference]: Without dead ends: 74 [2022-03-18 00:17:01,513 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 199 SyntacticMatches, 18 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=2262, Invalid=16644, Unknown=0, NotChecked=0, Total=18906 [2022-03-18 00:17:01,513 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 48 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2733 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:17:01,513 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 163 Invalid, 2841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2733 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 00:17:01,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-18 00:17:01,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-03-18 00:17:01,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 22 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-18 00:17:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2022-03-18 00:17:01,523 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 119 [2022-03-18 00:17:01,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:17:01,524 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2022-03-18 00:17:01,524 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 22 states have internal predecessors, (45), 20 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-18 00:17:01,524 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2022-03-18 00:17:01,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-18 00:17:01,524 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:17:01,524 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:17:01,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 00:17:01,730 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-18 00:17:01,731 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:17:01,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:17:01,731 INFO L85 PathProgramCache]: Analyzing trace with hash -630435168, now seen corresponding path program 37 times [2022-03-18 00:17:01,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:17:01,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [467177906] [2022-03-18 00:17:01,760 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:17:01,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1994161074, now seen corresponding path program 1 times [2022-03-18 00:17:01,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:17:01,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656400576] [2022-03-18 00:17:01,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:17:01,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:17:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:17:01,764 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:17:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:17:01,767 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:17:01,767 INFO L85 PathProgramCache]: Analyzing trace with hash -630435168, now seen corresponding path program 38 times [2022-03-18 00:17:01,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:17:01,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700829308] [2022-03-18 00:17:01,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:17:01,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:17:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:17:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:17:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:17:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:17:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:17:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:17:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:17:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:17:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:17:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 00:17:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 00:17:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-18 00:17:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-18 00:17:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-18 00:17:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-18 00:17:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-18 00:17:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-18 00:17:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-18 00:17:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-18 00:17:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-18 00:17:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-03-18 00:17:02,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:17:02,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700829308] [2022-03-18 00:17:02,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700829308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:17:02,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478323441] [2022-03-18 00:17:02,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:17:02,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:17:02,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:17:02,730 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:17:02,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 00:17:02,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:17:02,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:17:02,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 193 conjunts are in the unsatisfiable core [2022-03-18 00:17:02,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:17:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-03-18 00:17:04,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:17:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-03-18 00:17:25,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478323441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:17:25,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:17:25,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 60] total 102 [2022-03-18 00:17:25,550 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:17:25,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [467177906] [2022-03-18 00:17:25,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [467177906] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:17:25,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:17:25,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-18 00:17:25,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405250363] [2022-03-18 00:17:25,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:17:25,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 00:17:25,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:17:25,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 00:17:25,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1021, Invalid=9281, Unknown=0, NotChecked=0, Total=10302 [2022-03-18 00:17:25,552 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 23 states have internal predecessors, (47), 21 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-18 00:17:29,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:17:29,071 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2022-03-18 00:17:29,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 00:17:29,072 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 23 states have internal predecessors, (47), 21 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 125 [2022-03-18 00:17:29,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:17:29,075 INFO L225 Difference]: With dead ends: 82 [2022-03-18 00:17:29,075 INFO L226 Difference]: Without dead ends: 77 [2022-03-18 00:17:29,077 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 212 SyntacticMatches, 19 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2040 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=2455, Invalid=17567, Unknown=0, NotChecked=0, Total=20022 [2022-03-18 00:17:29,077 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 50 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3176 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 3284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 3176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 00:17:29,078 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 199 Invalid, 3284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 3176 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 00:17:29,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-18 00:17:29,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-03-18 00:17:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 23 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-18 00:17:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2022-03-18 00:17:29,104 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 125 [2022-03-18 00:17:29,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:17:29,105 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2022-03-18 00:17:29,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 23 states have internal predecessors, (47), 21 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-18 00:17:29,105 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2022-03-18 00:17:29,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-18 00:17:29,107 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:17:29,107 INFO L500 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:17:29,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 00:17:29,326 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-18 00:17:29,326 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:17:29,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:17:29,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2100635266, now seen corresponding path program 39 times [2022-03-18 00:17:29,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:17:29,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [223896350] [2022-03-18 00:17:29,346 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:17:29,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1935055730, now seen corresponding path program 1 times [2022-03-18 00:17:29,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:17:29,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486986146] [2022-03-18 00:17:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:17:29,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:17:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:17:29,371 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:17:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:17:29,375 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:17:29,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2100635266, now seen corresponding path program 40 times [2022-03-18 00:17:29,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:17:29,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271758964] [2022-03-18 00:17:29,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:17:29,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:17:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:29,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:17:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:29,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:17:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:29,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:17:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:29,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:17:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:30,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:17:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:30,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:17:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:30,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:17:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:30,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:17:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:30,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:17:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:30,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 00:17:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:30,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 00:17:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:30,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-18 00:17:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:30,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-18 00:17:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:30,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-18 00:17:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:30,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-18 00:17:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:30,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-18 00:17:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:30,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-18 00:17:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:30,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-18 00:17:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:30,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-18 00:17:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:30,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-18 00:17:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:30,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-18 00:17:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:17:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2022-03-18 00:17:30,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:17:30,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271758964] [2022-03-18 00:17:30,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271758964] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:17:30,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246106426] [2022-03-18 00:17:30,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:17:30,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:17:30,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:17:30,121 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:17:30,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 00:17:30,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:17:30,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:17:30,189 WARN L261 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 203 conjunts are in the unsatisfiable core [2022-03-18 00:17:30,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:17:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2022-03-18 00:17:31,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:18:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-18 00:18:02,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246106426] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:18:02,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:18:02,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 63] total 107 [2022-03-18 00:18:02,701 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:18:02,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [223896350] [2022-03-18 00:18:02,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [223896350] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:18:02,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:18:02,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-18 00:18:02,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143317666] [2022-03-18 00:18:02,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:18:02,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 00:18:02,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:18:02,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 00:18:02,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1114, Invalid=10228, Unknown=0, NotChecked=0, Total=11342 [2022-03-18 00:18:02,703 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 22 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-18 00:18:06,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:18:06,883 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2022-03-18 00:18:06,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-18 00:18:06,884 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 22 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 131 [2022-03-18 00:18:06,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:18:06,885 INFO L225 Difference]: With dead ends: 85 [2022-03-18 00:18:06,885 INFO L226 Difference]: Without dead ends: 80 [2022-03-18 00:18:06,886 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 222 SyntacticMatches, 20 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=2683, Invalid=19369, Unknown=0, NotChecked=0, Total=22052 [2022-03-18 00:18:06,886 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 52 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 3225 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 3348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 3225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:18:06,887 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 160 Invalid, 3348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 3225 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 00:18:06,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-18 00:18:06,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2022-03-18 00:18:06,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 24 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-18 00:18:06,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2022-03-18 00:18:06,897 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 131 [2022-03-18 00:18:06,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:18:06,897 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2022-03-18 00:18:06,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 22 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-18 00:18:06,898 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2022-03-18 00:18:06,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-18 00:18:06,898 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:18:06,898 INFO L500 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:18:06,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 00:18:07,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40,SelfDestructingSolverStorable41 [2022-03-18 00:18:07,116 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:18:07,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:18:07,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1330921948, now seen corresponding path program 41 times [2022-03-18 00:18:07,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:18:07,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1003730759] [2022-03-18 00:18:07,145 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:18:07,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1875950386, now seen corresponding path program 1 times [2022-03-18 00:18:07,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:18:07,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708064994] [2022-03-18 00:18:07,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:18:07,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:18:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:18:07,149 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:18:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:18:07,152 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:18:07,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1330921948, now seen corresponding path program 42 times [2022-03-18 00:18:07,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:18:07,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003531211] [2022-03-18 00:18:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:18:07,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:18:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:18:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:18:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:18:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:18:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:18:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:18:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:18:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:18:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:18:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 00:18:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 00:18:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-18 00:18:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-18 00:18:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-18 00:18:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-18 00:18:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-18 00:18:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-18 00:18:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-18 00:18:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-18 00:18:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-18 00:18:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-18 00:18:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-18 00:18:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-03-18 00:18:08,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:18:08,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003531211] [2022-03-18 00:18:08,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003531211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:18:08,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885608883] [2022-03-18 00:18:08,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:18:08,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:18:08,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:18:08,263 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:18:08,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 00:18:09,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-18 00:18:09,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:18:09,114 WARN L261 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 219 conjunts are in the unsatisfiable core [2022-03-18 00:18:09,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:18:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-03-18 00:18:11,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:18:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-18 00:18:30,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885608883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:18:30,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:18:30,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 69] total 115 [2022-03-18 00:18:30,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:18:30,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1003730759] [2022-03-18 00:18:30,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1003730759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:18:30,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:18:30,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-18 00:18:30,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215140348] [2022-03-18 00:18:30,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:18:30,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 00:18:30,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:18:30,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 00:18:30,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1239, Invalid=11871, Unknown=0, NotChecked=0, Total=13110 [2022-03-18 00:18:30,165 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 25 states have internal predecessors, (51), 23 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-18 00:18:35,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:18:35,021 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-03-18 00:18:35,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-18 00:18:35,023 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 25 states have internal predecessors, (51), 23 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 137 [2022-03-18 00:18:35,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:18:35,023 INFO L225 Difference]: With dead ends: 88 [2022-03-18 00:18:35,023 INFO L226 Difference]: Without dead ends: 83 [2022-03-18 00:18:35,025 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 229 SyntacticMatches, 21 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=2949, Invalid=22173, Unknown=0, NotChecked=0, Total=25122 [2022-03-18 00:18:35,025 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 54 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 4024 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 4136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 4024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:18:35,026 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 251 Invalid, 4136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 4024 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 00:18:35,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-18 00:18:35,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2022-03-18 00:18:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 25 states have call successors, (25), 4 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-18 00:18:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2022-03-18 00:18:35,045 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 137 [2022-03-18 00:18:35,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:18:35,046 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2022-03-18 00:18:35,046 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 25 states have internal predecessors, (51), 23 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-18 00:18:35,046 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2022-03-18 00:18:35,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-18 00:18:35,047 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:18:35,047 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:18:35,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 00:18:35,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-18 00:18:35,250 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:18:35,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:18:35,250 INFO L85 PathProgramCache]: Analyzing trace with hash -977704006, now seen corresponding path program 43 times [2022-03-18 00:18:35,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:18:35,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [868119659] [2022-03-18 00:18:35,276 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:18:35,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1816845042, now seen corresponding path program 1 times [2022-03-18 00:18:35,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:18:35,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347052942] [2022-03-18 00:18:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:18:35,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:18:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:18:35,282 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:18:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:18:35,285 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:18:35,285 INFO L85 PathProgramCache]: Analyzing trace with hash -977704006, now seen corresponding path program 44 times [2022-03-18 00:18:35,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:18:35,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965693050] [2022-03-18 00:18:35,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:18:35,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:18:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:35,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:18:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:35,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:18:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:35,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:18:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:35,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:18:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:18:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:18:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:18:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:18:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:18:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 00:18:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 00:18:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-18 00:18:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-18 00:18:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-18 00:18:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-18 00:18:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-18 00:18:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-18 00:18:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-18 00:18:36,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-18 00:18:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-18 00:18:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-18 00:18:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-18 00:18:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-18 00:18:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:18:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2022-03-18 00:18:36,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:18:36,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965693050] [2022-03-18 00:18:36,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965693050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:18:36,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146170656] [2022-03-18 00:18:36,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:18:36,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:18:36,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:18:36,142 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:18:36,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 00:18:36,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:18:36,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:18:36,235 WARN L261 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 223 conjunts are in the unsatisfiable core [2022-03-18 00:18:36,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:18:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2022-03-18 00:18:38,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:19:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-03-18 00:19:26,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146170656] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:19:26,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:19:26,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 69] total 117 [2022-03-18 00:19:26,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:19:26,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [868119659] [2022-03-18 00:19:26,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [868119659] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:19:26,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:19:26,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-18 00:19:26,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941627961] [2022-03-18 00:19:26,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:19:26,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 00:19:26,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:19:26,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 00:19:26,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1312, Invalid=12260, Unknown=0, NotChecked=0, Total=13572 [2022-03-18 00:19:26,979 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 26 states have internal predecessors, (53), 24 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-18 00:19:32,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:19:32,331 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2022-03-18 00:19:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-18 00:19:32,333 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 26 states have internal predecessors, (53), 24 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 143 [2022-03-18 00:19:32,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:19:32,334 INFO L225 Difference]: With dead ends: 91 [2022-03-18 00:19:32,334 INFO L226 Difference]: Without dead ends: 86 [2022-03-18 00:19:32,336 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 242 SyntacticMatches, 22 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 52.5s TimeCoverageRelationStatistics Valid=3169, Invalid=23237, Unknown=0, NotChecked=0, Total=26406 [2022-03-18 00:19:32,336 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 56 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 4391 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 4508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 4391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:19:32,336 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 262 Invalid, 4508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 4391 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 00:19:32,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-18 00:19:32,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-03-18 00:19:32,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 26 states have call successors, (26), 4 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 00:19:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2022-03-18 00:19:32,364 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 143 [2022-03-18 00:19:32,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:19:32,365 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2022-03-18 00:19:32,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 26 states have internal predecessors, (53), 24 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-18 00:19:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2022-03-18 00:19:32,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-18 00:19:32,365 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:19:32,365 INFO L500 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:19:32,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-18 00:19:32,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,SelfDestructingSolverStorable45,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:19:32,567 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:19:32,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:19:32,567 INFO L85 PathProgramCache]: Analyzing trace with hash -612157672, now seen corresponding path program 45 times [2022-03-18 00:19:32,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:19:32,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1652726306] [2022-03-18 00:19:32,595 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:19:32,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1757739698, now seen corresponding path program 1 times [2022-03-18 00:19:32,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:19:32,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672578429] [2022-03-18 00:19:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:19:32,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:19:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:19:32,599 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:19:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:19:32,604 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:19:32,604 INFO L85 PathProgramCache]: Analyzing trace with hash -612157672, now seen corresponding path program 46 times [2022-03-18 00:19:32,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:19:32,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752498007] [2022-03-18 00:19:32,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:19:32,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:19:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:19:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:19:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:19:33,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:19:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:19:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:19:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:19:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:19:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:19:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 00:19:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 00:19:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-18 00:19:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-18 00:19:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-18 00:19:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-18 00:19:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-18 00:19:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-18 00:19:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-18 00:19:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-18 00:19:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-18 00:19:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-18 00:19:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-18 00:19:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-18 00:19:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-18 00:19:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:19:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-03-18 00:19:33,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:19:33,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752498007] [2022-03-18 00:19:33,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752498007] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:19:33,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473949220] [2022-03-18 00:19:33,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:19:33,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:19:33,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:19:33,892 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:19:33,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 00:19:33,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:19:33,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:19:34,001 WARN L261 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 233 conjunts are in the unsatisfiable core [2022-03-18 00:19:34,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:19:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-03-18 00:19:36,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:20:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-03-18 00:20:55,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473949220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:20:55,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:20:55,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 72] total 122 [2022-03-18 00:20:55,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:20:55,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1652726306] [2022-03-18 00:20:55,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1652726306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:20:55,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:20:55,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-18 00:20:55,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057239268] [2022-03-18 00:20:55,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:20:55,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 00:20:55,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:20:55,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 00:20:55,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1417, Invalid=13345, Unknown=0, NotChecked=0, Total=14762 [2022-03-18 00:20:55,925 INFO L87 Difference]: Start difference. First operand 84 states and 106 transitions. Second operand has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 27 states have internal predecessors, (55), 25 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 00:21:02,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:21:02,329 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2022-03-18 00:21:02,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-18 00:21:02,332 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 27 states have internal predecessors, (55), 25 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 149 [2022-03-18 00:21:02,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:21:02,333 INFO L225 Difference]: With dead ends: 94 [2022-03-18 00:21:02,333 INFO L226 Difference]: Without dead ends: 89 [2022-03-18 00:21:02,334 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 252 SyntacticMatches, 23 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2928 ImplicationChecksByTransitivity, 83.9s TimeCoverageRelationStatistics Valid=3427, Invalid=25303, Unknown=0, NotChecked=0, Total=28730 [2022-03-18 00:21:02,335 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 58 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 4588 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 4716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 4588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:21:02,335 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 243 Invalid, 4716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 4588 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 00:21:02,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-18 00:21:02,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2022-03-18 00:21:02,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 27 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-18 00:21:02,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2022-03-18 00:21:02,348 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 149 [2022-03-18 00:21:02,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:21:02,348 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2022-03-18 00:21:02,348 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 27 states have internal predecessors, (55), 25 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 00:21:02,348 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2022-03-18 00:21:02,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-18 00:21:02,349 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:21:02,349 INFO L500 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:21:02,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-18 00:21:02,561 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,SelfDestructingSolverStorable47,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:21:02,562 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:21:02,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:21:02,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1273854986, now seen corresponding path program 47 times [2022-03-18 00:21:02,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:21:02,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1839307888] [2022-03-18 00:21:02,587 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:21:02,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1698634354, now seen corresponding path program 1 times [2022-03-18 00:21:02,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:21:02,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837903013] [2022-03-18 00:21:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:21:02,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:21:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:21:02,600 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:21:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:21:02,606 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:21:02,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1273854986, now seen corresponding path program 48 times [2022-03-18 00:21:02,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:21:02,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605160202] [2022-03-18 00:21:02,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:21:02,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:21:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:21:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:21:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:21:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:21:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:21:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:21:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:21:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:21:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:21:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 00:21:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 00:21:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-18 00:21:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-18 00:21:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-18 00:21:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-18 00:21:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-18 00:21:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-18 00:21:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-18 00:21:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-18 00:21:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-18 00:21:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-18 00:21:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-18 00:21:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-18 00:21:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-18 00:21:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:03,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-03-18 00:21:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:21:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2022-03-18 00:21:04,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:21:04,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605160202] [2022-03-18 00:21:04,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605160202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:21:04,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845884679] [2022-03-18 00:21:04,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:21:04,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:21:04,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:21:04,020 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:21:04,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 00:21:06,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-18 00:21:06,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:21:06,307 WARN L261 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 246 conjunts are in the unsatisfiable core [2022-03-18 00:21:06,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:21:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2022-03-18 00:21:09,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:22:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-18 00:22:01,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845884679] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:22:01,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:22:01,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 78] total 130 [2022-03-18 00:22:01,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:22:01,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1839307888] [2022-03-18 00:22:01,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1839307888] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:22:01,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:22:01,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-18 00:22:01,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154422902] [2022-03-18 00:22:01,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:22:01,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 00:22:01,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:22:01,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 00:22:01,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1557, Invalid=15213, Unknown=0, NotChecked=0, Total=16770 [2022-03-18 00:22:01,513 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 28 states have internal predecessors, (57), 26 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-18 00:22:10,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:22:10,200 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2022-03-18 00:22:10,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-18 00:22:10,202 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 28 states have internal predecessors, (57), 26 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 155 [2022-03-18 00:22:10,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:22:10,203 INFO L225 Difference]: With dead ends: 97 [2022-03-18 00:22:10,203 INFO L226 Difference]: Without dead ends: 92 [2022-03-18 00:22:10,204 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 259 SyntacticMatches, 24 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3181 ImplicationChecksByTransitivity, 58.5s TimeCoverageRelationStatistics Valid=3726, Invalid=28494, Unknown=0, NotChecked=0, Total=32220 [2022-03-18 00:22:10,204 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 60 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 4533 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 4680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 4533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:22:10,204 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 184 Invalid, 4680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 4533 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 00:22:10,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-18 00:22:10,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2022-03-18 00:22:10,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 28 states have call successors, (28), 4 states have call predecessors, (28), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-18 00:22:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 114 transitions. [2022-03-18 00:22:10,218 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 114 transitions. Word has length 155 [2022-03-18 00:22:10,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:22:10,218 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 114 transitions. [2022-03-18 00:22:10,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 28 states have internal predecessors, (57), 26 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-18 00:22:10,218 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 114 transitions. [2022-03-18 00:22:10,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-18 00:22:10,219 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:22:10,219 INFO L500 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:22:10,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-18 00:22:10,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48,SelfDestructingSolverStorable49 [2022-03-18 00:22:10,424 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:22:10,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:22:10,425 INFO L85 PathProgramCache]: Analyzing trace with hash -559926700, now seen corresponding path program 49 times [2022-03-18 00:22:10,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:22:10,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [459394079] [2022-03-18 00:22:10,450 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:22:10,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1639529010, now seen corresponding path program 1 times [2022-03-18 00:22:10,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:22:10,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127519194] [2022-03-18 00:22:10,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:22:10,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:22:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:22:10,453 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:22:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:22:10,456 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:22:10,456 INFO L85 PathProgramCache]: Analyzing trace with hash -559926700, now seen corresponding path program 50 times [2022-03-18 00:22:10,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:22:10,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20913052] [2022-03-18 00:22:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:22:10,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:22:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:22:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:22:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:22:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:22:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:22:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:22:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:22:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:22:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:22:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 00:22:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 00:22:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-18 00:22:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-18 00:22:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-18 00:22:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-18 00:22:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-18 00:22:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-18 00:22:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-18 00:22:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-18 00:22:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-18 00:22:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-18 00:22:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-18 00:22:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-18 00:22:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-18 00:22:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-03-18 00:22:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-18 00:22:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:22:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-03-18 00:22:11,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:22:11,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20913052] [2022-03-18 00:22:11,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20913052] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:22:11,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166719633] [2022-03-18 00:22:11,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:22:11,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:22:11,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:22:11,963 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:22:12,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 00:22:12,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:22:12,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:22:12,098 WARN L261 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 253 conjunts are in the unsatisfiable core [2022-03-18 00:22:12,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:22:15,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-03-18 00:22:15,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:24:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-03-18 00:24:32,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166719633] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:24:32,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:24:32,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 78] total 132 [2022-03-18 00:24:32,357 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:24:32,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [459394079] [2022-03-18 00:24:32,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [459394079] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:24:32,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:24:32,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-18 00:24:32,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741576922] [2022-03-18 00:24:32,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:24:32,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 00:24:32,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:24:32,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 00:24:32,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=15653, Unknown=0, NotChecked=0, Total=17292 [2022-03-18 00:24:32,359 INFO L87 Difference]: Start difference. First operand 90 states and 114 transitions. Second operand has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 27 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-18 00:24:41,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:24:41,625 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2022-03-18 00:24:41,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-18 00:24:41,628 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 27 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 161 [2022-03-18 00:24:41,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:24:41,629 INFO L225 Difference]: With dead ends: 100 [2022-03-18 00:24:41,629 INFO L226 Difference]: Without dead ends: 95 [2022-03-18 00:24:41,631 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 272 SyntacticMatches, 25 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3432 ImplicationChecksByTransitivity, 143.2s TimeCoverageRelationStatistics Valid=3973, Invalid=29699, Unknown=0, NotChecked=0, Total=33672 [2022-03-18 00:24:41,631 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 62 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 5258 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 5400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 5258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 00:24:41,632 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 245 Invalid, 5400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 5258 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 00:24:41,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-18 00:24:41,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2022-03-18 00:24:41,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 29 states have call successors, (29), 4 states have call predecessors, (29), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-18 00:24:41,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2022-03-18 00:24:41,652 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 161 [2022-03-18 00:24:41,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:24:41,653 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2022-03-18 00:24:41,653 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 29 states have internal predecessors, (59), 27 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-18 00:24:41,653 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2022-03-18 00:24:41,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-18 00:24:41,658 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:24:41,658 INFO L500 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:24:41,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-18 00:24:41,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-18 00:24:41,875 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:24:41,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:24:41,876 INFO L85 PathProgramCache]: Analyzing trace with hash 339550770, now seen corresponding path program 51 times [2022-03-18 00:24:41,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:24:41,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [831907271] [2022-03-18 00:24:41,903 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:24:41,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1580423666, now seen corresponding path program 1 times [2022-03-18 00:24:41,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:24:41,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417197181] [2022-03-18 00:24:41,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:24:41,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:24:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:24:41,908 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:24:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:24:41,935 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:24:41,935 INFO L85 PathProgramCache]: Analyzing trace with hash 339550770, now seen corresponding path program 52 times [2022-03-18 00:24:41,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:24:41,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017209269] [2022-03-18 00:24:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:24:41,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:24:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:24:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:24:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:24:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:24:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:24:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:24:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:24:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:24:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:24:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 00:24:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 00:24:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-18 00:24:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-18 00:24:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-18 00:24:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-18 00:24:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-18 00:24:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-18 00:24:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-18 00:24:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-18 00:24:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-18 00:24:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-18 00:24:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-18 00:24:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-18 00:24:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-18 00:24:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-03-18 00:24:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-18 00:24:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-03-18 00:24:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:24:43,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2022-03-18 00:24:43,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:24:43,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017209269] [2022-03-18 00:24:43,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017209269] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:24:43,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293281584] [2022-03-18 00:24:43,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:24:43,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:24:43,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:24:43,551 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:24:43,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 00:24:43,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:24:43,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:24:43,663 WARN L261 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 263 conjunts are in the unsatisfiable core [2022-03-18 00:24:43,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:24:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2022-03-18 00:24:47,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:27:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-03-18 00:27:48,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293281584] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:27:48,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:27:48,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 81] total 137 [2022-03-18 00:27:48,052 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:27:48,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [831907271] [2022-03-18 00:27:48,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [831907271] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:27:48,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:27:48,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-18 00:27:48,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358905072] [2022-03-18 00:27:48,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:27:48,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 00:27:48,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:27:48,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 00:27:48,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1756, Invalid=16876, Unknown=0, NotChecked=0, Total=18632 [2022-03-18 00:27:48,054 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 30 states have internal predecessors, (61), 28 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-18 00:28:03,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:28:03,434 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2022-03-18 00:28:03,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-18 00:28:03,437 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 30 states have internal predecessors, (61), 28 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 167 [2022-03-18 00:28:03,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:28:03,437 INFO L225 Difference]: With dead ends: 103 [2022-03-18 00:28:03,437 INFO L226 Difference]: Without dead ends: 98 [2022-03-18 00:28:03,439 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 282 SyntacticMatches, 26 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3699 ImplicationChecksByTransitivity, 192.3s TimeCoverageRelationStatistics Valid=4261, Invalid=32029, Unknown=0, NotChecked=0, Total=36290 [2022-03-18 00:28:03,440 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 64 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 5475 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 5628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 5475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 00:28:03,440 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 226 Invalid, 5628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 5475 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 00:28:03,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-18 00:28:03,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2022-03-18 00:28:03,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 30 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-18 00:28:03,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 122 transitions. [2022-03-18 00:28:03,472 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 122 transitions. Word has length 167 [2022-03-18 00:28:03,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:28:03,474 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 122 transitions. [2022-03-18 00:28:03,474 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 30 states have internal predecessors, (61), 28 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-18 00:28:03,474 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 122 transitions. [2022-03-18 00:28:03,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-18 00:28:03,475 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:28:03,475 INFO L500 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:28:03,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 00:28:03,702 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52,SelfDestructingSolverStorable53 [2022-03-18 00:28:03,702 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:28:03,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:28:03,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1976710032, now seen corresponding path program 53 times [2022-03-18 00:28:03,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:28:03,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [993956466] [2022-03-18 00:28:03,729 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:28:03,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1521318322, now seen corresponding path program 1 times [2022-03-18 00:28:03,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:28:03,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179872121] [2022-03-18 00:28:03,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:28:03,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:28:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:28:03,733 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:28:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:28:03,740 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:28:03,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1976710032, now seen corresponding path program 54 times [2022-03-18 00:28:03,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:28:03,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163676780] [2022-03-18 00:28:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:28:03,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:28:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:28:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 00:28:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-18 00:28:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-18 00:28:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-18 00:28:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-18 00:28:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-18 00:28:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-18 00:28:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-18 00:28:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-18 00:28:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-18 00:28:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-18 00:28:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-18 00:28:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-18 00:28:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-18 00:28:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-18 00:28:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-18 00:28:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-18 00:28:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-18 00:28:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-18 00:28:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-18 00:28:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-18 00:28:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-18 00:28:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-18 00:28:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-03-18 00:28:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-18 00:28:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-03-18 00:28:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-03-18 00:28:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:28:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2022-03-18 00:28:05,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:28:05,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163676780] [2022-03-18 00:28:05,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163676780] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:28:05,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169587795] [2022-03-18 00:28:05,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:28:05,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:28:05,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:28:05,404 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:28:05,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 00:28:08,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-03-18 00:28:08,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:28:08,090 WARN L261 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 279 conjunts are in the unsatisfiable core [2022-03-18 00:28:08,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:28:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2022-03-18 00:28:13,513 INFO L328 TraceCheckSpWp]: Computing backward predicates...