/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 08:50:59,630 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 08:50:59,699 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 08:50:59,704 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 08:50:59,705 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 08:50:59,727 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 08:50:59,727 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 08:50:59,727 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 08:50:59,728 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 08:50:59,731 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 08:50:59,731 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 08:50:59,732 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 08:50:59,732 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 08:50:59,733 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 08:50:59,733 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 08:50:59,733 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 08:50:59,734 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 08:50:59,734 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 08:50:59,734 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 08:50:59,734 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 08:50:59,734 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 08:50:59,734 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 08:50:59,735 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 08:50:59,735 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 08:50:59,735 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 08:50:59,735 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 08:50:59,735 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 08:50:59,735 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 08:50:59,736 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 08:50:59,736 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 08:50:59,737 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 08:50:59,737 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 08:50:59,737 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 08:50:59,737 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 08:50:59,737 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 08:50:59,737 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 08:50:59,737 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 08:50:59,737 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 08:50:59,737 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 08:50:59,737 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 08:50:59,738 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 08:50:59,738 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 08:50:59,738 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 08:50:59,738 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 08:50:59,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 08:50:59,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 08:50:59,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 08:50:59,966 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 08:50:59,966 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 08:50:59,967 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2023-12-20 08:51:01,002 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 08:51:01,135 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 08:51:01,136 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2023-12-20 08:51:01,142 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ff86d9e0/f30be009e02b4f70abfb06b87b8a60ae/FLAGfa286be0c [2023-12-20 08:51:01,153 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ff86d9e0/f30be009e02b4f70abfb06b87b8a60ae [2023-12-20 08:51:01,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 08:51:01,156 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 08:51:01,158 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 08:51:01,158 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 08:51:01,161 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 08:51:01,161 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 08:51:01" (1/1) ... [2023-12-20 08:51:01,162 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7896a0f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:51:01, skipping insertion in model container [2023-12-20 08:51:01,162 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 08:51:01" (1/1) ... [2023-12-20 08:51:01,179 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 08:51:01,278 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const5.c[406,419] [2023-12-20 08:51:01,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 08:51:01,299 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 08:51:01,307 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const5.c[406,419] [2023-12-20 08:51:01,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 08:51:01,322 INFO L206 MainTranslator]: Completed translation [2023-12-20 08:51:01,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:51:01 WrapperNode [2023-12-20 08:51:01,323 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 08:51:01,323 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 08:51:01,323 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 08:51:01,323 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 08:51:01,328 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:51:01" (1/1) ... [2023-12-20 08:51:01,340 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:51:01" (1/1) ... [2023-12-20 08:51:01,353 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 149 [2023-12-20 08:51:01,353 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 08:51:01,354 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 08:51:01,354 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 08:51:01,354 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 08:51:01,363 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:51:01" (1/1) ... [2023-12-20 08:51:01,363 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:51:01" (1/1) ... [2023-12-20 08:51:01,365 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:51:01" (1/1) ... [2023-12-20 08:51:01,373 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-12-20 08:51:01,373 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:51:01" (1/1) ... [2023-12-20 08:51:01,374 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:51:01" (1/1) ... [2023-12-20 08:51:01,379 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:51:01" (1/1) ... [2023-12-20 08:51:01,382 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:51:01" (1/1) ... [2023-12-20 08:51:01,383 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:51:01" (1/1) ... [2023-12-20 08:51:01,383 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:51:01" (1/1) ... [2023-12-20 08:51:01,384 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 08:51:01,385 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 08:51:01,385 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 08:51:01,385 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 08:51:01,386 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:51:01" (1/1) ... [2023-12-20 08:51:01,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 08:51:01,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:51:01,428 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-20 08:51:01,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-20 08:51:01,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 08:51:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 08:51:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 08:51:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 08:51:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 08:51:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-20 08:51:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 08:51:01,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 08:51:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 08:51:01,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 08:51:01,534 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 08:51:01,535 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 08:51:01,686 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 08:51:01,714 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 08:51:01,714 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-12-20 08:51:01,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 08:51:01 BoogieIcfgContainer [2023-12-20 08:51:01,714 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 08:51:01,716 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 08:51:01,716 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 08:51:01,718 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 08:51:01,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 08:51:01" (1/3) ... [2023-12-20 08:51:01,718 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58dc6225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 08:51:01, skipping insertion in model container [2023-12-20 08:51:01,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 08:51:01" (2/3) ... [2023-12-20 08:51:01,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58dc6225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 08:51:01, skipping insertion in model container [2023-12-20 08:51:01,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 08:51:01" (3/3) ... [2023-12-20 08:51:01,720 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2023-12-20 08:51:01,730 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 08:51:01,731 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 08:51:01,759 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 08:51:01,763 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@73f39c73, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 08:51:01,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 08:51:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-20 08:51:01,770 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:51:01,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:51:01,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:51:01,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:51:01,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1439288402, now seen corresponding path program 1 times [2023-12-20 08:51:01,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:51:01,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777885079] [2023-12-20 08:51:01,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:51:01,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:51:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:51:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:51:01,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:51:01,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777885079] [2023-12-20 08:51:01,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777885079] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 08:51:01,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 08:51:01,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 08:51:01,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437438321] [2023-12-20 08:51:01,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 08:51:01,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 08:51:01,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:51:01,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 08:51:01,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 08:51:01,968 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:02,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:51:02,014 INFO L93 Difference]: Finished difference Result 57 states and 100 transitions. [2023-12-20 08:51:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 08:51:02,016 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-20 08:51:02,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:51:02,020 INFO L225 Difference]: With dead ends: 57 [2023-12-20 08:51:02,021 INFO L226 Difference]: Without dead ends: 27 [2023-12-20 08:51:02,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 08:51:02,026 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:51:02,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:51:02,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-20 08:51:02,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-20 08:51:02,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:02,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2023-12-20 08:51:02,051 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 26 [2023-12-20 08:51:02,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:51:02,051 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2023-12-20 08:51:02,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:02,052 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2023-12-20 08:51:02,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-20 08:51:02,052 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:51:02,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:51:02,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 08:51:02,053 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:51:02,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:51:02,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1795376710, now seen corresponding path program 1 times [2023-12-20 08:51:02,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:51:02,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939451171] [2023-12-20 08:51:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:51:02,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:51:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:51:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:51:02,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:51:02,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939451171] [2023-12-20 08:51:02,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939451171] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 08:51:02,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 08:51:02,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 08:51:02,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539459027] [2023-12-20 08:51:02,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 08:51:02,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 08:51:02,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:51:02,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 08:51:02,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 08:51:02,165 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:02,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:51:02,211 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2023-12-20 08:51:02,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 08:51:02,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-20 08:51:02,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:51:02,214 INFO L225 Difference]: With dead ends: 52 [2023-12-20 08:51:02,214 INFO L226 Difference]: Without dead ends: 28 [2023-12-20 08:51:02,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 08:51:02,216 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:51:02,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 08:51:02,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-20 08:51:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-12-20 08:51:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2023-12-20 08:51:02,224 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 26 [2023-12-20 08:51:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:51:02,224 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2023-12-20 08:51:02,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:02,224 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2023-12-20 08:51:02,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-20 08:51:02,225 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:51:02,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:51:02,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 08:51:02,225 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:51:02,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:51:02,226 INFO L85 PathProgramCache]: Analyzing trace with hash -146231318, now seen corresponding path program 1 times [2023-12-20 08:51:02,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:51:02,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703640618] [2023-12-20 08:51:02,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:51:02,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:51:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:51:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 08:51:02,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:51:02,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703640618] [2023-12-20 08:51:02,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703640618] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 08:51:02,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 08:51:02,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 08:51:02,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455168850] [2023-12-20 08:51:02,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 08:51:02,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 08:51:02,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:51:02,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 08:51:02,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 08:51:02,335 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:02,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:51:02,417 INFO L93 Difference]: Finished difference Result 60 states and 88 transitions. [2023-12-20 08:51:02,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 08:51:02,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-20 08:51:02,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:51:02,419 INFO L225 Difference]: With dead ends: 60 [2023-12-20 08:51:02,420 INFO L226 Difference]: Without dead ends: 38 [2023-12-20 08:51:02,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 08:51:02,423 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:51:02,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 17 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:51:02,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-20 08:51:02,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-12-20 08:51:02,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:02,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-12-20 08:51:02,430 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 27 [2023-12-20 08:51:02,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:51:02,430 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-12-20 08:51:02,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:02,430 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-12-20 08:51:02,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-20 08:51:02,431 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:51:02,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:51:02,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 08:51:02,431 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:51:02,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:51:02,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1466683388, now seen corresponding path program 1 times [2023-12-20 08:51:02,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:51:02,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241516119] [2023-12-20 08:51:02,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:51:02,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:51:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:51:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 08:51:02,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:51:02,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241516119] [2023-12-20 08:51:02,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241516119] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:51:02,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493785502] [2023-12-20 08:51:02,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:51:02,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:02,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:51:02,592 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) [2023-12-20 08:51:02,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 08:51:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:51:02,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 08:51:02,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:51:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 08:51:02,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:51:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 08:51:02,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493785502] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:51:02,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:51:02,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-20 08:51:02,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797675970] [2023-12-20 08:51:02,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:51:02,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-20 08:51:02,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:51:02,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-20 08:51:02,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-20 08:51:02,712 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:02,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:51:02,778 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2023-12-20 08:51:02,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 08:51:02,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-20 08:51:02,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:51:02,779 INFO L225 Difference]: With dead ends: 73 [2023-12-20 08:51:02,779 INFO L226 Difference]: Without dead ends: 39 [2023-12-20 08:51:02,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-20 08:51:02,784 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:51:02,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:51:02,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-20 08:51:02,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-12-20 08:51:02,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2023-12-20 08:51:02,793 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 37 [2023-12-20 08:51:02,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:51:02,794 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2023-12-20 08:51:02,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:02,794 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2023-12-20 08:51:02,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-20 08:51:02,796 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:51:02,796 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:51:02,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-20 08:51:03,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:03,001 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:51:03,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:51:03,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1465337896, now seen corresponding path program 2 times [2023-12-20 08:51:03,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:51:03,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943283235] [2023-12-20 08:51:03,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:51:03,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:51:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:51:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 08:51:03,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:51:03,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943283235] [2023-12-20 08:51:03,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943283235] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:51:03,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937678776] [2023-12-20 08:51:03,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:51:03,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:03,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:51:03,108 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) [2023-12-20 08:51:03,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 08:51:03,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:51:03,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:51:03,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 08:51:03,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:51:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 08:51:03,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:51:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 08:51:03,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937678776] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:51:03,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:51:03,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-12-20 08:51:03,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619895038] [2023-12-20 08:51:03,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:51:03,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-20 08:51:03,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:51:03,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-20 08:51:03,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-20 08:51:03,327 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:03,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:51:03,400 INFO L93 Difference]: Finished difference Result 80 states and 108 transitions. [2023-12-20 08:51:03,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 08:51:03,400 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-20 08:51:03,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:51:03,400 INFO L225 Difference]: With dead ends: 80 [2023-12-20 08:51:03,400 INFO L226 Difference]: Without dead ends: 49 [2023-12-20 08:51:03,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-20 08:51:03,401 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:51:03,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 23 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:51:03,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-20 08:51:03,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-12-20 08:51:03,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:03,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2023-12-20 08:51:03,406 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 38 [2023-12-20 08:51:03,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:51:03,406 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2023-12-20 08:51:03,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:03,406 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2023-12-20 08:51:03,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-20 08:51:03,406 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:51:03,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:51:03,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 08:51:03,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:03,614 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:51:03,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:51:03,614 INFO L85 PathProgramCache]: Analyzing trace with hash -937808826, now seen corresponding path program 3 times [2023-12-20 08:51:03,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:51:03,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978547958] [2023-12-20 08:51:03,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:51:03,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:51:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:51:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:51:06,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:51:06,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978547958] [2023-12-20 08:51:06,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978547958] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:51:06,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203901873] [2023-12-20 08:51:06,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:51:06,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:06,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:51:06,241 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) [2023-12-20 08:51:06,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 08:51:06,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-20 08:51:06,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:51:06,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 96 conjunts are in the unsatisfiable core [2023-12-20 08:51:06,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:51:06,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 08:51:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:51:06,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:51:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 08:51:06,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203901873] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:51:06,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:51:06,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 21 [2023-12-20 08:51:06,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987788568] [2023-12-20 08:51:06,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:51:06,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-20 08:51:06,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:51:06,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-20 08:51:06,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2023-12-20 08:51:06,787 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:07,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:51:07,118 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2023-12-20 08:51:07,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 08:51:07,119 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-12-20 08:51:07,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:51:07,120 INFO L225 Difference]: With dead ends: 90 [2023-12-20 08:51:07,120 INFO L226 Difference]: Without dead ends: 86 [2023-12-20 08:51:07,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-12-20 08:51:07,120 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:51:07,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 132 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 08:51:07,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-20 08:51:07,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2023-12-20 08:51:07,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 83 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:07,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2023-12-20 08:51:07,129 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 48 [2023-12-20 08:51:07,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:51:07,129 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2023-12-20 08:51:07,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:07,129 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2023-12-20 08:51:07,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-20 08:51:07,130 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:51:07,130 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:51:07,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 08:51:07,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:07,335 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:51:07,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:51:07,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1905736107, now seen corresponding path program 4 times [2023-12-20 08:51:07,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:51:07,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091439408] [2023-12-20 08:51:07,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:51:07,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:51:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:51:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-20 08:51:07,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:51:07,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091439408] [2023-12-20 08:51:07,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091439408] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:51:07,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7177545] [2023-12-20 08:51:07,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:51:07,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:07,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:51:07,428 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) [2023-12-20 08:51:07,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 08:51:07,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:51:07,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:51:07,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 08:51:07,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:51:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-20 08:51:07,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:51:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-20 08:51:07,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7177545] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:51:07,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:51:07,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-12-20 08:51:07,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192111530] [2023-12-20 08:51:07,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:51:07,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-20 08:51:07,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:51:07,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-20 08:51:07,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-12-20 08:51:07,636 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:08,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:51:08,030 INFO L93 Difference]: Finished difference Result 175 states and 222 transitions. [2023-12-20 08:51:08,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-20 08:51:08,031 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-12-20 08:51:08,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:51:08,031 INFO L225 Difference]: With dead ends: 175 [2023-12-20 08:51:08,031 INFO L226 Difference]: Without dead ends: 60 [2023-12-20 08:51:08,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2023-12-20 08:51:08,032 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 140 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:51:08,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 53 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 08:51:08,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-20 08:51:08,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-12-20 08:51:08,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:08,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2023-12-20 08:51:08,037 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 49 [2023-12-20 08:51:08,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:51:08,037 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2023-12-20 08:51:08,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:08,038 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2023-12-20 08:51:08,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-20 08:51:08,038 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:51:08,038 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:51:08,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 08:51:08,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:08,245 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:51:08,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:51:08,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1240289028, now seen corresponding path program 5 times [2023-12-20 08:51:08,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:51:08,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725278035] [2023-12-20 08:51:08,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:51:08,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:51:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:51:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:51:12,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:51:12,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725278035] [2023-12-20 08:51:12,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725278035] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:51:12,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808571535] [2023-12-20 08:51:12,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:51:12,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:12,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:51:12,495 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) [2023-12-20 08:51:12,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 08:51:12,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-20 08:51:12,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:51:12,569 WARN L260 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 140 conjunts are in the unsatisfiable core [2023-12-20 08:51:12,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:51:12,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 08:51:12,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 08:51:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:51:13,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:51:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 08:51:13,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808571535] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:51:13,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:51:13,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 15, 11] total 48 [2023-12-20 08:51:13,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574540247] [2023-12-20 08:51:13,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:51:13,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-20 08:51:13,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:51:13,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-20 08:51:13,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2102, Unknown=0, NotChecked=0, Total=2256 [2023-12-20 08:51:13,487 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 48 states, 48 states have (on average 3.2083333333333335) internal successors, (154), 48 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:16,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:51:16,153 INFO L93 Difference]: Finished difference Result 176 states and 219 transitions. [2023-12-20 08:51:16,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-20 08:51:16,153 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.2083333333333335) internal successors, (154), 48 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-12-20 08:51:16,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:51:16,156 INFO L225 Difference]: With dead ends: 176 [2023-12-20 08:51:16,156 INFO L226 Difference]: Without dead ends: 170 [2023-12-20 08:51:16,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=735, Invalid=5117, Unknown=0, NotChecked=0, Total=5852 [2023-12-20 08:51:16,160 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 416 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 3186 mSolverCounterSat, 959 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 4145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 959 IncrementalHoareTripleChecker+Valid, 3186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-20 08:51:16,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 159 Invalid, 4145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [959 Valid, 3186 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-20 08:51:16,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-20 08:51:16,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 63. [2023-12-20 08:51:16,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 62 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2023-12-20 08:51:16,183 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 59 [2023-12-20 08:51:16,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:51:16,183 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2023-12-20 08:51:16,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.2083333333333335) internal successors, (154), 48 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2023-12-20 08:51:16,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-20 08:51:16,187 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:51:16,187 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:51:16,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 08:51:16,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:16,392 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:51:16,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:51:16,392 INFO L85 PathProgramCache]: Analyzing trace with hash 446028942, now seen corresponding path program 6 times [2023-12-20 08:51:16,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:51:16,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428243159] [2023-12-20 08:51:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:51:16,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:51:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:51:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-20 08:51:16,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:51:16,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428243159] [2023-12-20 08:51:16,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428243159] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:51:16,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617963184] [2023-12-20 08:51:16,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:51:16,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:16,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:51:16,490 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) [2023-12-20 08:51:16,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 08:51:16,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-12-20 08:51:16,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:51:16,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-20 08:51:16,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:51:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-20 08:51:16,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:51:16,668 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-20 08:51:16,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617963184] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:51:16,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:51:16,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-20 08:51:16,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596623164] [2023-12-20 08:51:16,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:51:16,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 08:51:16,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:51:16,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 08:51:16,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-20 08:51:16,670 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:16,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:51:16,884 INFO L93 Difference]: Finished difference Result 187 states and 226 transitions. [2023-12-20 08:51:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 08:51:16,884 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-12-20 08:51:16,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:51:16,885 INFO L225 Difference]: With dead ends: 187 [2023-12-20 08:51:16,885 INFO L226 Difference]: Without dead ends: 75 [2023-12-20 08:51:16,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 111 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-12-20 08:51:16,886 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:51:16,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 39 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:51:16,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-20 08:51:16,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2023-12-20 08:51:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 69 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2023-12-20 08:51:16,895 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 60 [2023-12-20 08:51:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:51:16,895 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2023-12-20 08:51:16,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2023-12-20 08:51:16,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-20 08:51:16,896 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:51:16,896 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:51:16,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 08:51:17,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:17,097 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:51:17,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:51:17,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1211467276, now seen corresponding path program 7 times [2023-12-20 08:51:17,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:51:17,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250366354] [2023-12-20 08:51:17,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:51:17,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:51:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:51:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-20 08:51:17,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:51:17,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250366354] [2023-12-20 08:51:17,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250366354] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:51:17,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555958483] [2023-12-20 08:51:17,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:51:17,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:17,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:51:17,194 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) [2023-12-20 08:51:17,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 08:51:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:51:17,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-20 08:51:17,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:51:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-20 08:51:17,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:51:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-20 08:51:17,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555958483] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:51:17,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:51:17,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-20 08:51:17,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820070412] [2023-12-20 08:51:17,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:51:17,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 08:51:17,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:51:17,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 08:51:17,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-20 08:51:17,462 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:17,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:51:17,668 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2023-12-20 08:51:17,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 08:51:17,668 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-12-20 08:51:17,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:51:17,669 INFO L225 Difference]: With dead ends: 75 [2023-12-20 08:51:17,669 INFO L226 Difference]: Without dead ends: 71 [2023-12-20 08:51:17,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 124 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-12-20 08:51:17,669 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:51:17,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 29 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:51:17,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-20 08:51:17,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-12-20 08:51:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:17,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2023-12-20 08:51:17,678 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 69 [2023-12-20 08:51:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:51:17,678 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2023-12-20 08:51:17,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:17,678 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2023-12-20 08:51:17,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-20 08:51:17,679 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:51:17,679 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:51:17,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-20 08:51:17,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:17,884 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:51:17,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:51:17,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1063443898, now seen corresponding path program 8 times [2023-12-20 08:51:17,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:51:17,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26460494] [2023-12-20 08:51:17,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:51:17,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:51:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:51:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 3 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:51:22,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:51:22,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26460494] [2023-12-20 08:51:22,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26460494] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:51:22,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957780034] [2023-12-20 08:51:22,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:51:22,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:22,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:51:22,361 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) [2023-12-20 08:51:22,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 08:51:22,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:51:22,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:51:22,435 WARN L260 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 184 conjunts are in the unsatisfiable core [2023-12-20 08:51:22,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:51:22,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 08:51:23,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:51:23,432 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:51:23,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 36 [2023-12-20 08:51:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:51:23,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:51:24,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2023-12-20 08:51:24,505 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:51:24,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 69 [2023-12-20 08:51:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:51:24,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957780034] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:51:24,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:51:24,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 22, 24] total 80 [2023-12-20 08:51:24,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990391685] [2023-12-20 08:51:24,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:51:24,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-12-20 08:51:24,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:51:24,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-12-20 08:51:24,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=5947, Unknown=0, NotChecked=0, Total=6320 [2023-12-20 08:51:24,704 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 80 states, 80 states have (on average 2.525) internal successors, (202), 80 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:31,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:51:31,511 INFO L93 Difference]: Finished difference Result 332 states and 392 transitions. [2023-12-20 08:51:31,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-12-20 08:51:31,511 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.525) internal successors, (202), 80 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-12-20 08:51:31,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:51:31,514 INFO L225 Difference]: With dead ends: 332 [2023-12-20 08:51:31,514 INFO L226 Difference]: Without dead ends: 205 [2023-12-20 08:51:31,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1854, Invalid=15968, Unknown=0, NotChecked=0, Total=17822 [2023-12-20 08:51:31,520 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 695 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 6042 mSolverCounterSat, 2254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 8296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2254 IncrementalHoareTripleChecker+Valid, 6042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:51:31,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 278 Invalid, 8296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2254 Valid, 6042 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-12-20 08:51:31,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-12-20 08:51:31,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 73. [2023-12-20 08:51:31,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 72 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:31,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2023-12-20 08:51:31,539 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 70 [2023-12-20 08:51:31,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:51:31,539 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2023-12-20 08:51:31,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.525) internal successors, (202), 80 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:31,539 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2023-12-20 08:51:31,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-20 08:51:31,539 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:51:31,540 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:51:31,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 08:51:31,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-20 08:51:31,745 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:51:31,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:51:31,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1320222248, now seen corresponding path program 9 times [2023-12-20 08:51:31,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:51:31,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032074926] [2023-12-20 08:51:31,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:51:31,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:51:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:51:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-12-20 08:51:31,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:51:31,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032074926] [2023-12-20 08:51:31,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032074926] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:51:31,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487589540] [2023-12-20 08:51:31,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:51:31,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:31,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:51:31,899 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) [2023-12-20 08:51:31,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 08:51:31,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-20 08:51:31,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:51:31,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 08:51:31,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:51:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-12-20 08:51:32,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:51:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-12-20 08:51:32,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487589540] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:51:32,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:51:32,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2023-12-20 08:51:32,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27935035] [2023-12-20 08:51:32,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:51:32,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-20 08:51:32,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:51:32,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-20 08:51:32,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2023-12-20 08:51:32,183 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:32,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:51:32,478 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2023-12-20 08:51:32,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 08:51:32,478 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2023-12-20 08:51:32,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:51:32,479 INFO L225 Difference]: With dead ends: 141 [2023-12-20 08:51:32,479 INFO L226 Difference]: Without dead ends: 82 [2023-12-20 08:51:32,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 128 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2023-12-20 08:51:32,480 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 130 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:51:32,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 39 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 08:51:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-20 08:51:32,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-12-20 08:51:32,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 81 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:32,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2023-12-20 08:51:32,497 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 72 [2023-12-20 08:51:32,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:51:32,497 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2023-12-20 08:51:32,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:32,498 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2023-12-20 08:51:32,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-20 08:51:32,498 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:51:32,498 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:51:32,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-20 08:51:32,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:32,708 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:51:32,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:51:32,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1906442748, now seen corresponding path program 10 times [2023-12-20 08:51:32,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:51:32,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136003804] [2023-12-20 08:51:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:51:32,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:51:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:51:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 6 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:51:41,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:51:41,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136003804] [2023-12-20 08:51:41,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136003804] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:51:41,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472571303] [2023-12-20 08:51:41,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:51:41,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:41,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:51:41,490 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) [2023-12-20 08:51:41,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 08:51:41,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:51:41,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:51:41,581 WARN L260 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 222 conjunts are in the unsatisfiable core [2023-12-20 08:51:41,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:51:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 5 proven. 150 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-20 08:51:42,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:51:43,443 INFO L349 Elim1Store]: treesize reduction 60, result has 77.2 percent of original size [2023-12-20 08:51:43,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 86 treesize of output 217 [2023-12-20 08:51:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 08:51:44,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472571303] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:51:44,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:51:44,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 18, 26] total 88 [2023-12-20 08:51:44,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068833576] [2023-12-20 08:51:44,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:51:44,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-12-20 08:51:44,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:51:44,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-12-20 08:51:44,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=7193, Unknown=0, NotChecked=0, Total=7656 [2023-12-20 08:51:44,541 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 88 states, 88 states have (on average 2.6363636363636362) internal successors, (232), 88 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:51,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:51:51,846 INFO L93 Difference]: Finished difference Result 287 states and 337 transitions. [2023-12-20 08:51:51,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-20 08:51:51,847 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.6363636363636362) internal successors, (232), 88 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2023-12-20 08:51:51,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:51:51,848 INFO L225 Difference]: With dead ends: 287 [2023-12-20 08:51:51,848 INFO L226 Difference]: Without dead ends: 216 [2023-12-20 08:51:51,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4943 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2579, Invalid=19177, Unknown=0, NotChecked=0, Total=21756 [2023-12-20 08:51:51,851 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 671 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 5296 mSolverCounterSat, 2095 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 7391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2095 IncrementalHoareTripleChecker+Valid, 5296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-20 08:51:51,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 148 Invalid, 7391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2095 Valid, 5296 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-20 08:51:51,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-12-20 08:51:51,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 175. [2023-12-20 08:51:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.1436781609195403) internal successors, (199), 174 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 199 transitions. [2023-12-20 08:51:51,894 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 199 transitions. Word has length 81 [2023-12-20 08:51:51,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:51:51,895 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 199 transitions. [2023-12-20 08:51:51,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.6363636363636362) internal successors, (232), 88 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 199 transitions. [2023-12-20 08:51:51,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-20 08:51:51,896 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:51:51,896 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:51:51,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-20 08:51:52,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-20 08:51:52,101 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:51:52,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:51:52,101 INFO L85 PathProgramCache]: Analyzing trace with hash -2031370866, now seen corresponding path program 11 times [2023-12-20 08:51:52,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:51:52,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915817181] [2023-12-20 08:51:52,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:51:52,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:51:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:51:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-12-20 08:51:52,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:51:52,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915817181] [2023-12-20 08:51:52,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915817181] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:51:52,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928710204] [2023-12-20 08:51:52,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:51:52,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:52,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:51:52,278 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) [2023-12-20 08:51:52,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 08:51:52,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-20 08:51:52,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:51:52,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-20 08:51:52,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:51:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-12-20 08:51:52,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:51:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-12-20 08:51:52,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928710204] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:51:52,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:51:52,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-20 08:51:52,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843318050] [2023-12-20 08:51:52,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:51:52,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 08:51:52,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:51:52,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 08:51:52,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-12-20 08:51:52,676 INFO L87 Difference]: Start difference. First operand 175 states and 199 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:53,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:51:53,087 INFO L93 Difference]: Finished difference Result 351 states and 401 transitions. [2023-12-20 08:51:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-20 08:51:53,087 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2023-12-20 08:51:53,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:51:53,088 INFO L225 Difference]: With dead ends: 351 [2023-12-20 08:51:53,088 INFO L226 Difference]: Without dead ends: 97 [2023-12-20 08:51:53,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 145 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-12-20 08:51:53,089 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 76 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:51:53,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 39 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 08:51:53,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-20 08:51:53,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2023-12-20 08:51:53,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.120879120879121) internal successors, (102), 91 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:53,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2023-12-20 08:51:53,111 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 82 [2023-12-20 08:51:53,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:51:53,112 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2023-12-20 08:51:53,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:53,112 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2023-12-20 08:51:53,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-20 08:51:53,112 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:51:53,112 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:51:53,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 08:51:53,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-20 08:51:53,317 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:51:53,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:51:53,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1505378292, now seen corresponding path program 12 times [2023-12-20 08:51:53,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:51:53,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994135598] [2023-12-20 08:51:53,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:51:53,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:51:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:51:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-12-20 08:51:53,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:51:53,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994135598] [2023-12-20 08:51:53,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994135598] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:51:53,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314454916] [2023-12-20 08:51:53,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:51:53,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:51:53,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:51:53,525 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) [2023-12-20 08:51:53,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 08:51:53,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-20 08:51:53,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:51:53,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-20 08:51:53,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:51:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-12-20 08:51:53,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:51:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-12-20 08:51:53,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314454916] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:51:53,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:51:53,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-20 08:51:53,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617465950] [2023-12-20 08:51:53,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:51:53,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 08:51:53,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:51:53,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 08:51:53,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-12-20 08:51:53,873 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:54,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:51:54,085 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2023-12-20 08:51:54,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 08:51:54,086 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2023-12-20 08:51:54,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:51:54,088 INFO L225 Difference]: With dead ends: 97 [2023-12-20 08:51:54,088 INFO L226 Difference]: Without dead ends: 93 [2023-12-20 08:51:54,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 162 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2023-12-20 08:51:54,091 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:51:54,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 23 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 08:51:54,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-20 08:51:54,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-12-20 08:51:54,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.1195652173913044) internal successors, (103), 92 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:54,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2023-12-20 08:51:54,125 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 91 [2023-12-20 08:51:54,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:51:54,125 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2023-12-20 08:51:54,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:51:54,125 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2023-12-20 08:51:54,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-20 08:51:54,141 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:51:54,141 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:51:54,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-20 08:51:54,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-20 08:51:54,346 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:51:54,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:51:54,347 INFO L85 PathProgramCache]: Analyzing trace with hash 613689414, now seen corresponding path program 13 times [2023-12-20 08:51:54,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:51:54,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503709861] [2023-12-20 08:51:54,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:51:54,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:51:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:52:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 12 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:52:02,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:52:02,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503709861] [2023-12-20 08:52:02,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503709861] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:52:02,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330520566] [2023-12-20 08:52:02,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:52:02,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:52:02,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:52:02,951 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) [2023-12-20 08:52:02,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-20 08:52:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:52:03,058 WARN L260 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 264 conjunts are in the unsatisfiable core [2023-12-20 08:52:03,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:52:03,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 08:52:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:52:04,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:52:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-20 08:52:05,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330520566] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:52:05,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:52:05,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 24, 17] total 97 [2023-12-20 08:52:05,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309361595] [2023-12-20 08:52:05,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:52:05,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-12-20 08:52:05,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:52:05,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-12-20 08:52:05,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=8873, Unknown=0, NotChecked=0, Total=9312 [2023-12-20 08:52:05,322 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 97 states, 97 states have (on average 2.6907216494845363) internal successors, (261), 97 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:52:11,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:52:11,896 INFO L93 Difference]: Finished difference Result 367 states and 415 transitions. [2023-12-20 08:52:11,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-12-20 08:52:11,896 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.6907216494845363) internal successors, (261), 97 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2023-12-20 08:52:11,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:52:11,897 INFO L225 Difference]: With dead ends: 367 [2023-12-20 08:52:11,897 INFO L226 Difference]: Without dead ends: 208 [2023-12-20 08:52:11,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6167 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1436, Invalid=20026, Unknown=0, NotChecked=0, Total=21462 [2023-12-20 08:52:11,898 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 378 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 6691 mSolverCounterSat, 1536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 8227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1536 IncrementalHoareTripleChecker+Valid, 6691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:52:11,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 374 Invalid, 8227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1536 Valid, 6691 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-12-20 08:52:11,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-12-20 08:52:11,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 171. [2023-12-20 08:52:11,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1352941176470588) internal successors, (193), 170 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:52:11,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 193 transitions. [2023-12-20 08:52:11,951 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 193 transitions. Word has length 92 [2023-12-20 08:52:11,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:52:11,951 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 193 transitions. [2023-12-20 08:52:11,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.6907216494845363) internal successors, (261), 97 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:52:11,951 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 193 transitions. [2023-12-20 08:52:11,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-12-20 08:52:11,952 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:52:11,952 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:52:11,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-20 08:52:12,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-20 08:52:12,158 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:52:12,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:52:12,158 INFO L85 PathProgramCache]: Analyzing trace with hash 2147245339, now seen corresponding path program 14 times [2023-12-20 08:52:12,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:52:12,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484372469] [2023-12-20 08:52:12,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:52:12,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:52:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:52:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-12-20 08:52:12,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:52:12,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484372469] [2023-12-20 08:52:12,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484372469] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:52:12,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326265592] [2023-12-20 08:52:12,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:52:12,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:52:12,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:52:12,334 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) [2023-12-20 08:52:12,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-20 08:52:12,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:52:12,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:52:12,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 08:52:12,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:52:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-12-20 08:52:12,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:52:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-12-20 08:52:12,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326265592] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:52:12,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:52:12,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-12-20 08:52:12,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047861295] [2023-12-20 08:52:12,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:52:12,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-20 08:52:12,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:52:12,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-20 08:52:12,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-12-20 08:52:12,648 INFO L87 Difference]: Start difference. First operand 171 states and 193 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:52:13,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:52:13,040 INFO L93 Difference]: Finished difference Result 248 states and 286 transitions. [2023-12-20 08:52:13,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-20 08:52:13,040 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2023-12-20 08:52:13,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:52:13,041 INFO L225 Difference]: With dead ends: 248 [2023-12-20 08:52:13,041 INFO L226 Difference]: Without dead ends: 104 [2023-12-20 08:52:13,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 165 SyntacticMatches, 14 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 08:52:13,044 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 138 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:52:13,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 23 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 08:52:13,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-12-20 08:52:13,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-12-20 08:52:13,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.1067961165048543) internal successors, (114), 103 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:52:13,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2023-12-20 08:52:13,077 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 94 [2023-12-20 08:52:13,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:52:13,077 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2023-12-20 08:52:13,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:52:13,077 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2023-12-20 08:52:13,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-20 08:52:13,078 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:52:13,078 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:52:13,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-20 08:52:13,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:52:13,282 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:52:13,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:52:13,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1814969604, now seen corresponding path program 15 times [2023-12-20 08:52:13,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:52:13,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112222697] [2023-12-20 08:52:13,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:52:13,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:52:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:52:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 24 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:52:25,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:52:25,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112222697] [2023-12-20 08:52:25,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112222697] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:52:25,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24902073] [2023-12-20 08:52:25,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:52:25,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:52:25,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:52:25,207 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) [2023-12-20 08:52:25,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-20 08:52:25,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-20 08:52:25,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:52:25,375 WARN L260 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 309 conjunts are in the unsatisfiable core [2023-12-20 08:52:25,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:52:25,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 08:52:27,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:52:27,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:52:27,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:52:27,957 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:52:27,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 74 [2023-12-20 08:52:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 7 proven. 280 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-20 08:52:28,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:52:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-20 08:52:29,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24902073] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:52:29,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:52:29,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 25, 21] total 108 [2023-12-20 08:52:29,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115603838] [2023-12-20 08:52:29,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:52:29,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-12-20 08:52:29,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:52:29,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-12-20 08:52:29,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=11009, Unknown=0, NotChecked=0, Total=11556 [2023-12-20 08:52:29,895 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 108 states, 108 states have (on average 2.712962962962963) internal successors, (293), 108 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:52:48,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:52:48,411 INFO L93 Difference]: Finished difference Result 354 states and 397 transitions. [2023-12-20 08:52:48,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-12-20 08:52:48,412 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.712962962962963) internal successors, (293), 108 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-12-20 08:52:48,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:52:48,415 INFO L225 Difference]: With dead ends: 354 [2023-12-20 08:52:48,415 INFO L226 Difference]: Without dead ends: 346 [2023-12-20 08:52:48,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 180 SyntacticMatches, 12 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9942 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=4141, Invalid=35659, Unknown=0, NotChecked=0, Total=39800 [2023-12-20 08:52:48,417 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 473 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 12528 mSolverCounterSat, 2294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 14822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2294 IncrementalHoareTripleChecker+Valid, 12528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-12-20 08:52:48,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 351 Invalid, 14822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2294 Valid, 12528 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-12-20 08:52:48,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-12-20 08:52:48,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 105. [2023-12-20 08:52:48,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1057692307692308) internal successors, (115), 104 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:52:48,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2023-12-20 08:52:48,469 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 103 [2023-12-20 08:52:48,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:52:48,469 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2023-12-20 08:52:48,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.712962962962963) internal successors, (293), 108 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:52:48,470 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2023-12-20 08:52:48,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-12-20 08:52:48,470 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:52:48,470 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:52:48,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-20 08:52:48,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-20 08:52:48,677 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:52:48,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:52:48,677 INFO L85 PathProgramCache]: Analyzing trace with hash -393706666, now seen corresponding path program 16 times [2023-12-20 08:52:48,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:52:48,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36235233] [2023-12-20 08:52:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:52:48,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:52:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:52:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-12-20 08:52:48,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:52:48,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36235233] [2023-12-20 08:52:48,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36235233] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:52:48,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112047315] [2023-12-20 08:52:48,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:52:48,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:52:48,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:52:48,913 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) [2023-12-20 08:52:48,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-20 08:52:49,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:52:49,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:52:49,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-20 08:52:49,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:52:49,221 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-12-20 08:52:49,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:52:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-12-20 08:52:49,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112047315] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:52:49,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:52:49,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-12-20 08:52:49,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764233389] [2023-12-20 08:52:49,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:52:49,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-20 08:52:49,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:52:49,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-20 08:52:49,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-12-20 08:52:49,373 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:52:49,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:52:49,948 INFO L93 Difference]: Finished difference Result 301 states and 339 transitions. [2023-12-20 08:52:49,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-20 08:52:49,948 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2023-12-20 08:52:49,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:52:49,949 INFO L225 Difference]: With dead ends: 301 [2023-12-20 08:52:49,949 INFO L226 Difference]: Without dead ends: 115 [2023-12-20 08:52:49,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 184 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2023-12-20 08:52:49,949 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 73 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 08:52:49,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 40 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 08:52:49,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-20 08:52:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-12-20 08:52:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0964912280701755) internal successors, (125), 114 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:52:50,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2023-12-20 08:52:50,005 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 104 [2023-12-20 08:52:50,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:52:50,006 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2023-12-20 08:52:50,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:52:50,006 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2023-12-20 08:52:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-20 08:52:50,006 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:52:50,006 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:52:50,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-20 08:52:50,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:52:50,210 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:52:50,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:52:50,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1762082374, now seen corresponding path program 17 times [2023-12-20 08:52:50,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:52:50,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638371503] [2023-12-20 08:52:50,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:52:50,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:52:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:53:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 37 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:53:07,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:53:07,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638371503] [2023-12-20 08:53:07,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638371503] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:53:07,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182455715] [2023-12-20 08:53:07,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:53:07,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:53:07,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:53:07,256 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) [2023-12-20 08:53:07,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-20 08:53:07,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-20 08:53:07,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:53:07,572 WARN L260 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 348 conjunts are in the unsatisfiable core [2023-12-20 08:53:07,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:53:07,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 08:53:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:53:09,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:53:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-20 08:53:11,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182455715] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:53:11,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:53:11,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 30, 21] total 127 [2023-12-20 08:53:11,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819974501] [2023-12-20 08:53:11,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:53:11,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2023-12-20 08:53:11,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:53:11,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2023-12-20 08:53:11,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=659, Invalid=15343, Unknown=0, NotChecked=0, Total=16002 [2023-12-20 08:53:11,445 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 127 states, 127 states have (on average 2.559055118110236) internal successors, (325), 127 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:53:21,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:53:21,806 INFO L93 Difference]: Finished difference Result 362 states and 405 transitions. [2023-12-20 08:53:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-20 08:53:21,807 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.559055118110236) internal successors, (325), 127 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2023-12-20 08:53:21,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:53:21,808 INFO L225 Difference]: With dead ends: 362 [2023-12-20 08:53:21,808 INFO L226 Difference]: Without dead ends: 266 [2023-12-20 08:53:21,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10096 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=2647, Invalid=30659, Unknown=0, NotChecked=0, Total=33306 [2023-12-20 08:53:21,810 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 513 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 10584 mSolverCounterSat, 2267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 12851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2267 IncrementalHoareTripleChecker+Valid, 10584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-12-20 08:53:21,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 224 Invalid, 12851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2267 Valid, 10584 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-12-20 08:53:21,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-12-20 08:53:21,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 198. [2023-12-20 08:53:21,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.1116751269035532) internal successors, (219), 197 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:53:21,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 219 transitions. [2023-12-20 08:53:21,934 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 219 transitions. Word has length 114 [2023-12-20 08:53:21,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:53:21,935 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 219 transitions. [2023-12-20 08:53:21,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.559055118110236) internal successors, (325), 127 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:53:21,935 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 219 transitions. [2023-12-20 08:53:21,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-20 08:53:21,936 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:53:21,936 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:53:21,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-20 08:53:22,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:53:22,142 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:53:22,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:53:22,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1986155244, now seen corresponding path program 18 times [2023-12-20 08:53:22,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:53:22,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183017438] [2023-12-20 08:53:22,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:53:22,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:53:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:53:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-12-20 08:53:22,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:53:22,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183017438] [2023-12-20 08:53:22,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183017438] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:53:22,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123690412] [2023-12-20 08:53:22,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:53:22,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:53:22,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:53:22,414 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) [2023-12-20 08:53:22,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-20 08:53:22,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-20 08:53:22,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:53:22,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-20 08:53:22,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:53:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-12-20 08:53:22,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:53:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2023-12-20 08:53:22,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123690412] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:53:22,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:53:22,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-12-20 08:53:22,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924980481] [2023-12-20 08:53:22,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:53:22,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-20 08:53:22,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:53:22,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-20 08:53:22,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-12-20 08:53:22,928 INFO L87 Difference]: Start difference. First operand 198 states and 219 transitions. Second operand has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:53:23,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:53:23,649 INFO L93 Difference]: Finished difference Result 402 states and 446 transitions. [2023-12-20 08:53:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-20 08:53:23,650 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2023-12-20 08:53:23,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:53:23,650 INFO L225 Difference]: With dead ends: 402 [2023-12-20 08:53:23,650 INFO L226 Difference]: Without dead ends: 130 [2023-12-20 08:53:23,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 211 SyntacticMatches, 17 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2023-12-20 08:53:23,651 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 61 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 881 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 881 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 08:53:23,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 42 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [881 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 08:53:23,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-20 08:53:23,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2023-12-20 08:53:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0887096774193548) internal successors, (135), 124 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:53:23,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2023-12-20 08:53:23,725 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 115 [2023-12-20 08:53:23,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:53:23,725 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2023-12-20 08:53:23,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.875) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:53:23,725 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2023-12-20 08:53:23,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-20 08:53:23,725 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:53:23,725 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:53:23,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-20 08:53:23,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:53:23,928 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:53:23,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:53:23,929 INFO L85 PathProgramCache]: Analyzing trace with hash 744269206, now seen corresponding path program 19 times [2023-12-20 08:53:23,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:53:23,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952497080] [2023-12-20 08:53:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:53:23,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:53:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:53:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2023-12-20 08:53:24,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:53:24,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952497080] [2023-12-20 08:53:24,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952497080] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:53:24,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305993294] [2023-12-20 08:53:24,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:53:24,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:53:24,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:53:24,275 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) [2023-12-20 08:53:24,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-20 08:53:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:53:24,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-20 08:53:24,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:53:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2023-12-20 08:53:24,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:53:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2023-12-20 08:53:24,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305993294] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:53:24,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:53:24,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-12-20 08:53:24,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720254703] [2023-12-20 08:53:24,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:53:24,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-20 08:53:24,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:53:24,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-20 08:53:24,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-12-20 08:53:24,815 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:53:25,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:53:25,335 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2023-12-20 08:53:25,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-20 08:53:25,335 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2023-12-20 08:53:25,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:53:25,336 INFO L225 Difference]: With dead ends: 130 [2023-12-20 08:53:25,336 INFO L226 Difference]: Without dead ends: 126 [2023-12-20 08:53:25,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 219 SyntacticMatches, 18 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=418, Invalid=1388, Unknown=0, NotChecked=0, Total=1806 [2023-12-20 08:53:25,341 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 08:53:25,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 26 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [561 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 08:53:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-20 08:53:25,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-12-20 08:53:25,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.088) internal successors, (136), 125 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:53:25,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2023-12-20 08:53:25,417 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 124 [2023-12-20 08:53:25,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:53:25,417 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2023-12-20 08:53:25,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:53:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2023-12-20 08:53:25,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-20 08:53:25,418 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:53:25,418 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:53:25,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-20 08:53:25,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:53:25,623 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:53:25,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:53:25,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1633285116, now seen corresponding path program 20 times [2023-12-20 08:53:25,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:53:25,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438937098] [2023-12-20 08:53:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:53:25,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:53:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:53:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 49 proven. 446 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:53:47,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:53:47,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438937098] [2023-12-20 08:53:47,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438937098] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:53:47,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768919935] [2023-12-20 08:53:47,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:53:47,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:53:47,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:53:47,278 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) [2023-12-20 08:53:47,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-20 08:53:47,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:53:47,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:53:47,453 WARN L260 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 390 conjunts are in the unsatisfiable core [2023-12-20 08:53:47,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:53:47,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 08:53:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:53:49,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:53:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-20 08:53:52,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768919935] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:53:52,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:53:52,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 33, 23] total 136 [2023-12-20 08:53:52,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106715507] [2023-12-20 08:53:52,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:53:52,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2023-12-20 08:53:52,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:53:52,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2023-12-20 08:53:52,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=17601, Unknown=0, NotChecked=0, Total=18360 [2023-12-20 08:53:52,177 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand has 136 states, 136 states have (on average 2.625) internal successors, (357), 136 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:04,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:54:04,658 INFO L93 Difference]: Finished difference Result 496 states and 544 transitions. [2023-12-20 08:54:04,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-12-20 08:54:04,659 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.625) internal successors, (357), 136 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2023-12-20 08:54:04,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:54:04,660 INFO L225 Difference]: With dead ends: 496 [2023-12-20 08:54:04,660 INFO L226 Difference]: Without dead ends: 280 [2023-12-20 08:54:04,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11701 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=2380, Invalid=37420, Unknown=0, NotChecked=0, Total=39800 [2023-12-20 08:54:04,662 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 395 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 11770 mSolverCounterSat, 2050 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 13820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2050 IncrementalHoareTripleChecker+Valid, 11770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-12-20 08:54:04,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 402 Invalid, 13820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2050 Valid, 11770 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-12-20 08:54:04,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-12-20 08:54:04,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 228. [2023-12-20 08:54:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.1013215859030836) internal successors, (250), 227 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:04,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 250 transitions. [2023-12-20 08:54:04,858 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 250 transitions. Word has length 125 [2023-12-20 08:54:04,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:54:04,858 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 250 transitions. [2023-12-20 08:54:04,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.625) internal successors, (357), 136 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:04,859 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 250 transitions. [2023-12-20 08:54:04,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-20 08:54:04,860 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:54:04,860 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:54:04,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-20 08:54:05,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-20 08:54:05,065 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:54:05,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:54:05,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1862182787, now seen corresponding path program 21 times [2023-12-20 08:54:05,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:54:05,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763394426] [2023-12-20 08:54:05,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:54:05,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:54:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:54:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2023-12-20 08:54:05,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:54:05,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763394426] [2023-12-20 08:54:05,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763394426] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:54:05,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318084324] [2023-12-20 08:54:05,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:54:05,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:54:05,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:54:05,381 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) [2023-12-20 08:54:05,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-20 08:54:05,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-20 08:54:05,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:54:05,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-20 08:54:05,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:54:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2023-12-20 08:54:05,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:54:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2023-12-20 08:54:06,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318084324] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:54:06,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:54:06,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-12-20 08:54:06,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593540199] [2023-12-20 08:54:06,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:54:06,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-20 08:54:06,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:54:06,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-20 08:54:06,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 08:54:06,013 INFO L87 Difference]: Start difference. First operand 228 states and 250 transitions. Second operand has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:06,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:54:06,513 INFO L93 Difference]: Finished difference Result 329 states and 367 transitions. [2023-12-20 08:54:06,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-20 08:54:06,513 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2023-12-20 08:54:06,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:54:06,514 INFO L225 Difference]: With dead ends: 329 [2023-12-20 08:54:06,514 INFO L226 Difference]: Without dead ends: 137 [2023-12-20 08:54:06,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 222 SyntacticMatches, 20 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=497, Invalid=1665, Unknown=0, NotChecked=0, Total=2162 [2023-12-20 08:54:06,515 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:54:06,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 29 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 08:54:06,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-12-20 08:54:06,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-12-20 08:54:06,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0808823529411764) internal successors, (147), 136 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:06,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 147 transitions. [2023-12-20 08:54:06,627 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 147 transitions. Word has length 127 [2023-12-20 08:54:06,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:54:06,627 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 147 transitions. [2023-12-20 08:54:06,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:06,628 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 147 transitions. [2023-12-20 08:54:06,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-12-20 08:54:06,628 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:54:06,628 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:54:06,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-20 08:54:06,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-20 08:54:06,834 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:54:06,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:54:06,836 INFO L85 PathProgramCache]: Analyzing trace with hash 670983238, now seen corresponding path program 22 times [2023-12-20 08:54:06,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:54:06,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431613832] [2023-12-20 08:54:06,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:54:06,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:54:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:54:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 60 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:54:34,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:54:34,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431613832] [2023-12-20 08:54:34,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431613832] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:54:34,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487239945] [2023-12-20 08:54:34,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:54:34,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:54:34,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:54:34,388 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) [2023-12-20 08:54:34,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-20 08:54:34,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:54:34,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:54:34,611 WARN L260 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 412 conjunts are in the unsatisfiable core [2023-12-20 08:54:34,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:54:34,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-20 08:54:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 10 proven. 550 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-20 08:54:37,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:54:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 550 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-20 08:54:40,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487239945] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:54:40,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:54:40,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 27, 25] total 146 [2023-12-20 08:54:40,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193889932] [2023-12-20 08:54:40,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:54:40,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2023-12-20 08:54:40,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:54:40,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2023-12-20 08:54:40,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=895, Invalid=20275, Unknown=0, NotChecked=0, Total=21170 [2023-12-20 08:54:40,651 INFO L87 Difference]: Start difference. First operand 137 states and 147 transitions. Second operand has 146 states, 146 states have (on average 2.6232876712328768) internal successors, (383), 146 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:57,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:54:57,584 INFO L93 Difference]: Finished difference Result 641 states and 701 transitions. [2023-12-20 08:54:57,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-12-20 08:54:57,589 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.6232876712328768) internal successors, (383), 146 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2023-12-20 08:54:57,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:54:57,590 INFO L225 Difference]: With dead ends: 641 [2023-12-20 08:54:57,590 INFO L226 Difference]: Without dead ends: 404 [2023-12-20 08:54:57,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14856 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=3148, Invalid=45914, Unknown=0, NotChecked=0, Total=49062 [2023-12-20 08:54:57,592 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 381 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 12871 mSolverCounterSat, 2246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 15117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2246 IncrementalHoareTripleChecker+Valid, 12871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:54:57,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 456 Invalid, 15117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2246 Valid, 12871 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-12-20 08:54:57,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2023-12-20 08:54:57,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 319. [2023-12-20 08:54:57,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.0943396226415094) internal successors, (348), 318 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:57,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 348 transitions. [2023-12-20 08:54:57,840 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 348 transitions. Word has length 136 [2023-12-20 08:54:57,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:54:57,840 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 348 transitions. [2023-12-20 08:54:57,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.6232876712328768) internal successors, (383), 146 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:54:57,841 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 348 transitions. [2023-12-20 08:54:57,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-20 08:54:57,841 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:54:57,841 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:54:57,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-20 08:54:58,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:54:58,048 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:54:58,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:54:58,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1791908581, now seen corresponding path program 23 times [2023-12-20 08:54:58,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:54:58,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609419681] [2023-12-20 08:54:58,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:54:58,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:54:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:54:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-12-20 08:54:58,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:54:58,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609419681] [2023-12-20 08:54:58,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609419681] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:54:58,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107490662] [2023-12-20 08:54:58,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:54:58,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:54:58,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:54:58,359 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) [2023-12-20 08:54:58,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-20 08:54:59,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-20 08:54:59,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:54:59,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-20 08:54:59,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:54:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-12-20 08:54:59,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:54:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2023-12-20 08:54:59,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107490662] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:54:59,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:54:59,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-12-20 08:54:59,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325758478] [2023-12-20 08:54:59,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:54:59,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-20 08:54:59,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:54:59,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-20 08:54:59,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2023-12-20 08:54:59,488 INFO L87 Difference]: Start difference. First operand 319 states and 348 transitions. Second operand has 38 states, 38 states have (on average 2.8684210526315788) internal successors, (109), 38 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:55:00,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:55:00,124 INFO L93 Difference]: Finished difference Result 428 states and 473 transitions. [2023-12-20 08:55:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-20 08:55:00,125 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.8684210526315788) internal successors, (109), 38 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2023-12-20 08:55:00,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:55:00,125 INFO L225 Difference]: With dead ends: 428 [2023-12-20 08:55:00,125 INFO L226 Difference]: Without dead ends: 148 [2023-12-20 08:55:00,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 241 SyntacticMatches, 22 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=583, Invalid=1967, Unknown=0, NotChecked=0, Total=2550 [2023-12-20 08:55:00,126 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 732 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 732 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 08:55:00,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 29 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [732 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 08:55:00,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-12-20 08:55:00,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2023-12-20 08:55:00,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0748299319727892) internal successors, (158), 147 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:55:00,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2023-12-20 08:55:00,239 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 138 [2023-12-20 08:55:00,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:55:00,239 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2023-12-20 08:55:00,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.8684210526315788) internal successors, (109), 38 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:55:00,239 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2023-12-20 08:55:00,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-12-20 08:55:00,240 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:55:00,240 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:55:00,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-20 08:55:00,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:55:00,443 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:55:00,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:55:00,443 INFO L85 PathProgramCache]: Analyzing trace with hash -638413572, now seen corresponding path program 24 times [2023-12-20 08:55:00,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:55:00,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939211662] [2023-12-20 08:55:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:55:00,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:55:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:55:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 108 proven. 618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:55:34,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:55:34,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939211662] [2023-12-20 08:55:34,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939211662] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:55:34,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449838105] [2023-12-20 08:55:34,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 08:55:34,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:55:34,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:55:34,916 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) [2023-12-20 08:55:34,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-20 08:55:35,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-20 08:55:35,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:55:35,289 WARN L260 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 489 conjunts are in the unsatisfiable core [2023-12-20 08:55:35,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:55:35,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 08:55:35,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 08:55:57,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 08:55:57,776 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 08:55:57,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 37 [2023-12-20 08:55:57,993 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 0 proven. 726 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:55:57,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:56:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 0 proven. 671 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-20 08:56:14,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449838105] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:56:14,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:56:14,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 61, 75] total 235 [2023-12-20 08:56:14,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389406051] [2023-12-20 08:56:14,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:56:14,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 235 states [2023-12-20 08:56:14,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:56:14,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 235 interpolants. [2023-12-20 08:56:14,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2277, Invalid=52709, Unknown=4, NotChecked=0, Total=54990 [2023-12-20 08:56:14,128 INFO L87 Difference]: Start difference. First operand 148 states and 158 transitions. Second operand has 235 states, 235 states have (on average 1.804255319148936) internal successors, (424), 235 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:57:11,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:57:11,057 INFO L93 Difference]: Finished difference Result 578 states and 627 transitions. [2023-12-20 08:57:11,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-12-20 08:57:11,058 INFO L78 Accepts]: Start accepts. Automaton has has 235 states, 235 states have (on average 1.804255319148936) internal successors, (424), 235 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2023-12-20 08:57:11,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:57:11,059 INFO L225 Difference]: With dead ends: 578 [2023-12-20 08:57:11,059 INFO L226 Difference]: Without dead ends: 320 [2023-12-20 08:57:11,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 192 SyntacticMatches, 5 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32127 ImplicationChecksByTransitivity, 75.9s TimeCoverageRelationStatistics Valid=8842, Invalid=100384, Unknown=4, NotChecked=0, Total=109230 [2023-12-20 08:57:11,064 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1080 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 32336 mSolverCounterSat, 6769 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 39105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6769 IncrementalHoareTripleChecker+Valid, 32336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.3s IncrementalHoareTripleChecker+Time [2023-12-20 08:57:11,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 540 Invalid, 39105 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6769 Valid, 32336 Invalid, 0 Unknown, 0 Unchecked, 23.3s Time] [2023-12-20 08:57:11,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-12-20 08:57:11,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 150. [2023-12-20 08:57:11,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0738255033557047) internal successors, (160), 149 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:57:11,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 160 transitions. [2023-12-20 08:57:11,215 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 160 transitions. Word has length 147 [2023-12-20 08:57:11,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:57:11,215 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 160 transitions. [2023-12-20 08:57:11,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 235 states, 235 states have (on average 1.804255319148936) internal successors, (424), 235 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:57:11,216 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 160 transitions. [2023-12-20 08:57:11,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-20 08:57:11,216 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:57:11,217 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:57:11,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-20 08:57:11,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-20 08:57:11,423 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:57:11,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:57:11,424 INFO L85 PathProgramCache]: Analyzing trace with hash -771611142, now seen corresponding path program 25 times [2023-12-20 08:57:11,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:57:11,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716018098] [2023-12-20 08:57:11,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:57:11,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:57:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:57:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 55 proven. 89 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2023-12-20 08:57:11,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:57:11,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716018098] [2023-12-20 08:57:11,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716018098] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:57:11,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569346386] [2023-12-20 08:57:11,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 08:57:11,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:57:11,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:57:11,835 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) [2023-12-20 08:57:11,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-20 08:57:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:57:12,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-20 08:57:12,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:57:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2023-12-20 08:57:12,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:57:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2023-12-20 08:57:12,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569346386] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:57:12,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:57:12,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-12-20 08:57:12,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134303112] [2023-12-20 08:57:12,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:57:12,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-20 08:57:12,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:57:12,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-20 08:57:12,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2023-12-20 08:57:12,438 INFO L87 Difference]: Start difference. First operand 150 states and 160 transitions. Second operand has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 41 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:57:13,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:57:13,225 INFO L93 Difference]: Finished difference Result 281 states and 308 transitions. [2023-12-20 08:57:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-20 08:57:13,226 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 41 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2023-12-20 08:57:13,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:57:13,226 INFO L225 Difference]: With dead ends: 281 [2023-12-20 08:57:13,226 INFO L226 Difference]: Without dead ends: 159 [2023-12-20 08:57:13,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 260 SyntacticMatches, 24 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=676, Invalid=2294, Unknown=0, NotChecked=0, Total=2970 [2023-12-20 08:57:13,227 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 08:57:13,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 29 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 08:57:13,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-12-20 08:57:13,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2023-12-20 08:57:13,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0696202531645569) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:57:13,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 169 transitions. [2023-12-20 08:57:13,386 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 169 transitions. Word has length 149 [2023-12-20 08:57:13,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:57:13,386 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 169 transitions. [2023-12-20 08:57:13,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 41 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:57:13,387 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 169 transitions. [2023-12-20 08:57:13,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-20 08:57:13,387 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:57:13,387 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:57:13,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-20 08:57:13,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-20 08:57:13,593 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:57:13,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:57:13,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1602119098, now seen corresponding path program 26 times [2023-12-20 08:57:13,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:57:13,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262253351] [2023-12-20 08:57:13,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:57:13,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:57:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:57:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 114 proven. 744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:57:57,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:57:57,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262253351] [2023-12-20 08:57:57,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262253351] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:57:57,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148973178] [2023-12-20 08:57:57,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 08:57:57,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:57:57,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:57:57,815 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) [2023-12-20 08:57:57,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-20 08:57:58,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 08:57:58,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:57:58,036 WARN L260 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 516 conjunts are in the unsatisfiable core [2023-12-20 08:57:58,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:57:58,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 08:58:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 858 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:58:02,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:58:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-20 08:58:06,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148973178] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:58:06,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:58:06,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 42, 29] total 182 [2023-12-20 08:58:06,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065050832] [2023-12-20 08:58:06,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:58:06,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2023-12-20 08:58:06,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:58:06,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2023-12-20 08:58:06,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1271, Invalid=31671, Unknown=0, NotChecked=0, Total=32942 [2023-12-20 08:58:06,215 INFO L87 Difference]: Start difference. First operand 159 states and 169 transitions. Second operand has 182 states, 182 states have (on average 2.489010989010989) internal successors, (453), 182 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:58:29,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:58:29,602 INFO L93 Difference]: Finished difference Result 498 states and 541 transitions. [2023-12-20 08:58:29,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-12-20 08:58:29,603 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 2.489010989010989) internal successors, (453), 182 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2023-12-20 08:58:29,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:58:29,604 INFO L225 Difference]: With dead ends: 498 [2023-12-20 08:58:29,604 INFO L226 Difference]: Without dead ends: 366 [2023-12-20 08:58:29,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22128 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=5099, Invalid=63283, Unknown=0, NotChecked=0, Total=68382 [2023-12-20 08:58:29,606 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 639 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 19860 mSolverCounterSat, 3935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 23795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3935 IncrementalHoareTripleChecker+Valid, 19860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2023-12-20 08:58:29,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 285 Invalid, 23795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3935 Valid, 19860 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2023-12-20 08:58:29,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2023-12-20 08:58:29,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 270. [2023-12-20 08:58:29,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.0817843866171004) internal successors, (291), 269 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:58:29,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 291 transitions. [2023-12-20 08:58:29,908 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 291 transitions. Word has length 158 [2023-12-20 08:58:29,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:58:29,908 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 291 transitions. [2023-12-20 08:58:29,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 2.489010989010989) internal successors, (453), 182 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:58:29,908 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 291 transitions. [2023-12-20 08:58:29,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-12-20 08:58:29,909 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:58:29,909 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:58:29,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-20 08:58:30,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-20 08:58:30,116 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:58:30,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:58:30,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1180413204, now seen corresponding path program 27 times [2023-12-20 08:58:30,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:58:30,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053859719] [2023-12-20 08:58:30,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:58:30,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:58:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:58:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2023-12-20 08:58:30,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:58:30,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053859719] [2023-12-20 08:58:30,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053859719] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:58:30,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996814858] [2023-12-20 08:58:30,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 08:58:30,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:58:30,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:58:30,604 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) [2023-12-20 08:58:30,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-20 08:58:30,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-20 08:58:30,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:58:30,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-20 08:58:30,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:58:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2023-12-20 08:58:31,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:58:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2023-12-20 08:58:31,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996814858] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:58:31,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:58:31,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2023-12-20 08:58:31,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720360894] [2023-12-20 08:58:31,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:58:31,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-20 08:58:31,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:58:31,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-20 08:58:31,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2023-12-20 08:58:31,617 INFO L87 Difference]: Start difference. First operand 270 states and 291 transitions. Second operand has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:58:32,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:58:32,702 INFO L93 Difference]: Finished difference Result 546 states and 590 transitions. [2023-12-20 08:58:32,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-20 08:58:32,703 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2023-12-20 08:58:32,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:58:32,703 INFO L225 Difference]: With dead ends: 546 [2023-12-20 08:58:32,703 INFO L226 Difference]: Without dead ends: 174 [2023-12-20 08:58:32,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 291 SyntacticMatches, 25 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=765, Invalid=2427, Unknown=0, NotChecked=0, Total=3192 [2023-12-20 08:58:32,704 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 97 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 1059 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1059 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 08:58:32,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 45 Invalid, 2085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1059 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 08:58:32,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-12-20 08:58:32,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 169. [2023-12-20 08:58:32,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0654761904761905) internal successors, (179), 168 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:58:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 179 transitions. [2023-12-20 08:58:32,895 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 179 transitions. Word has length 159 [2023-12-20 08:58:32,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:58:32,896 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 179 transitions. [2023-12-20 08:58:32,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:58:32,896 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 179 transitions. [2023-12-20 08:58:32,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-12-20 08:58:32,896 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:58:32,896 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:58:32,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-20 08:58:33,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:58:33,104 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:58:33,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:58:33,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1771785322, now seen corresponding path program 28 times [2023-12-20 08:58:33,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:58:33,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705352302] [2023-12-20 08:58:33,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:58:33,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:58:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:58:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 66 proven. 103 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2023-12-20 08:58:33,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:58:33,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705352302] [2023-12-20 08:58:33,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705352302] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:58:33,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325781835] [2023-12-20 08:58:33,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 08:58:33,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:58:33,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:58:33,599 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:58:33,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-20 08:58:33,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 08:58:33,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:58:33,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-20 08:58:33,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:58:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2023-12-20 08:58:34,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:58:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2023-12-20 08:58:34,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325781835] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:58:34,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:58:34,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2023-12-20 08:58:34,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716700187] [2023-12-20 08:58:34,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:58:34,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-20 08:58:34,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:58:34,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-20 08:58:34,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2023-12-20 08:58:34,400 INFO L87 Difference]: Start difference. First operand 169 states and 179 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:58:35,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 08:58:35,329 INFO L93 Difference]: Finished difference Result 174 states and 184 transitions. [2023-12-20 08:58:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-20 08:58:35,329 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2023-12-20 08:58:35,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 08:58:35,330 INFO L225 Difference]: With dead ends: 174 [2023-12-20 08:58:35,330 INFO L226 Difference]: Without dead ends: 170 [2023-12-20 08:58:35,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 296 SyntacticMatches, 26 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=776, Invalid=2646, Unknown=0, NotChecked=0, Total=3422 [2023-12-20 08:58:35,339 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 866 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 866 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 08:58:35,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 26 Invalid, 1989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [866 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 08:58:35,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-20 08:58:35,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2023-12-20 08:58:35,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.0650887573964498) internal successors, (180), 169 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:58:35,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 180 transitions. [2023-12-20 08:58:35,534 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 180 transitions. Word has length 168 [2023-12-20 08:58:35,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 08:58:35,534 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 180 transitions. [2023-12-20 08:58:35,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 08:58:35,534 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 180 transitions. [2023-12-20 08:58:35,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-12-20 08:58:35,535 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 08:58:35,535 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 08:58:35,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-20 08:58:35,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:58:35,740 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 08:58:35,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 08:58:35,741 INFO L85 PathProgramCache]: Analyzing trace with hash 945006076, now seen corresponding path program 29 times [2023-12-20 08:58:35,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 08:58:35,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690677874] [2023-12-20 08:58:35,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 08:58:35,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 08:58:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 08:59:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 199 proven. 802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:59:25,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 08:59:25,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690677874] [2023-12-20 08:59:25,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690677874] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 08:59:25,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83557864] [2023-12-20 08:59:25,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 08:59:25,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 08:59:25,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 08:59:25,692 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 08:59:25,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-20 08:59:26,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-20 08:59:26,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 08:59:26,477 WARN L260 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 560 conjunts are in the unsatisfiable core [2023-12-20 08:59:26,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 08:59:27,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 08:59:27,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 08:59:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 08:59:31,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 08:59:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 910 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-20 08:59:36,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83557864] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 08:59:36,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 08:59:36,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 45, 31] total 183 [2023-12-20 08:59:36,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118757629] [2023-12-20 08:59:36,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 08:59:36,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2023-12-20 08:59:36,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 08:59:36,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2023-12-20 08:59:36,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1160, Invalid=32146, Unknown=0, NotChecked=0, Total=33306 [2023-12-20 08:59:36,179 INFO L87 Difference]: Start difference. First operand 170 states and 180 transitions. Second operand has 183 states, 183 states have (on average 2.650273224043716) internal successors, (485), 183 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:00:13,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:00:13,986 INFO L93 Difference]: Finished difference Result 603 states and 660 transitions. [2023-12-20 09:00:13,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-12-20 09:00:13,986 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 2.650273224043716) internal successors, (485), 183 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2023-12-20 09:00:13,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:00:13,990 INFO L225 Difference]: With dead ends: 603 [2023-12-20 09:00:13,990 INFO L226 Difference]: Without dead ends: 595 [2023-12-20 09:00:13,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 305 SyntacticMatches, 10 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28016 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=7231, Invalid=83069, Unknown=0, NotChecked=0, Total=90300 [2023-12-20 09:00:13,994 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 736 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 33627 mSolverCounterSat, 4992 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 38619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4992 IncrementalHoareTripleChecker+Valid, 33627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2023-12-20 09:00:13,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 307 Invalid, 38619 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4992 Valid, 33627 Invalid, 0 Unknown, 0 Unchecked, 18.8s Time] [2023-12-20 09:00:13,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2023-12-20 09:00:14,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 173. [2023-12-20 09:00:14,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.069767441860465) internal successors, (184), 172 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:00:14,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 184 transitions. [2023-12-20 09:00:14,223 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 184 transitions. Word has length 169 [2023-12-20 09:00:14,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:00:14,223 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 184 transitions. [2023-12-20 09:00:14,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 2.650273224043716) internal successors, (485), 183 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:00:14,224 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 184 transitions. [2023-12-20 09:00:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-12-20 09:00:14,224 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:00:14,224 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:00:14,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-20 09:00:14,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:00:14,434 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:00:14,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:00:14,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1866604146, now seen corresponding path program 30 times [2023-12-20 09:00:14,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:00:14,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478019287] [2023-12-20 09:00:14,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:00:14,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:00:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:00:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 92 proven. 104 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2023-12-20 09:00:15,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:00:15,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478019287] [2023-12-20 09:00:15,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478019287] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:00:15,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796487161] [2023-12-20 09:00:15,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 09:00:15,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:00:15,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:00:15,029 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:00:15,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-20 09:00:15,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-12-20 09:00:15,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:00:15,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-20 09:00:15,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:00:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2023-12-20 09:00:16,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:00:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2023-12-20 09:00:16,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796487161] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:00:16,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:00:16,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-12-20 09:00:16,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971579815] [2023-12-20 09:00:16,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:00:16,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-20 09:00:16,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:00:16,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-20 09:00:16,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2023-12-20 09:00:16,485 INFO L87 Difference]: Start difference. First operand 173 states and 184 transitions. Second operand has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:00:17,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:00:17,576 INFO L93 Difference]: Finished difference Result 487 states and 526 transitions. [2023-12-20 09:00:17,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-20 09:00:17,577 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2023-12-20 09:00:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:00:17,596 INFO L225 Difference]: With dead ends: 487 [2023-12-20 09:00:17,596 INFO L226 Difference]: Without dead ends: 185 [2023-12-20 09:00:17,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 311 SyntacticMatches, 27 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2023-12-20 09:00:17,597 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 71 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 1292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1292 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 09:00:17,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 48 Invalid, 2365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1292 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 09:00:17,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-12-20 09:00:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 180. [2023-12-20 09:00:17,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.0614525139664805) internal successors, (190), 179 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:00:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 190 transitions. [2023-12-20 09:00:17,852 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 190 transitions. Word has length 170 [2023-12-20 09:00:17,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:00:17,853 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 190 transitions. [2023-12-20 09:00:17,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:00:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 190 transitions. [2023-12-20 09:00:17,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-12-20 09:00:17,853 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:00:17,853 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:00:17,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-20 09:00:18,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-12-20 09:00:18,061 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:00:18,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:00:18,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1690961932, now seen corresponding path program 31 times [2023-12-20 09:00:18,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:00:18,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715002218] [2023-12-20 09:00:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:00:18,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:00:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:00:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 78 proven. 118 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2023-12-20 09:00:18,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:00:18,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715002218] [2023-12-20 09:00:18,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715002218] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:00:18,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60498952] [2023-12-20 09:00:18,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 09:00:18,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:00:18,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:00:18,575 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:00:18,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-20 09:00:18,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:00:18,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-20 09:00:18,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:00:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2023-12-20 09:00:19,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:00:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2023-12-20 09:00:19,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60498952] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:00:19,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:00:19,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-12-20 09:00:19,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414039854] [2023-12-20 09:00:19,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:00:19,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-20 09:00:19,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:00:19,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-20 09:00:19,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2023-12-20 09:00:19,561 INFO L87 Difference]: Start difference. First operand 180 states and 190 transitions. Second operand has 47 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:00:20,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:00:20,405 INFO L93 Difference]: Finished difference Result 185 states and 195 transitions. [2023-12-20 09:00:20,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-20 09:00:20,405 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2023-12-20 09:00:20,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:00:20,406 INFO L225 Difference]: With dead ends: 185 [2023-12-20 09:00:20,406 INFO L226 Difference]: Without dead ends: 181 [2023-12-20 09:00:20,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 314 SyntacticMatches, 28 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=883, Invalid=3023, Unknown=0, NotChecked=0, Total=3906 [2023-12-20 09:00:20,407 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 2480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 09:00:20,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 47 Invalid, 2480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [816 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 09:00:20,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-12-20 09:00:20,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-12-20 09:00:20,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0611111111111111) internal successors, (191), 180 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:00:20,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 191 transitions. [2023-12-20 09:00:20,629 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 191 transitions. Word has length 179 [2023-12-20 09:00:20,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:00:20,630 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 191 transitions. [2023-12-20 09:00:20,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:00:20,630 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 191 transitions. [2023-12-20 09:00:20,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-12-20 09:00:20,630 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:00:20,630 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:00:20,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-20 09:00:20,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:00:20,837 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:00:20,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:00:20,837 INFO L85 PathProgramCache]: Analyzing trace with hash 915988550, now seen corresponding path program 32 times [2023-12-20 09:00:20,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:00:20,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034491613] [2023-12-20 09:00:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:00:20,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:00:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:01:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 201 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:01:21,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:01:21,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034491613] [2023-12-20 09:01:21,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034491613] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:01:21,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144804538] [2023-12-20 09:01:21,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:01:21,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:01:21,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:01:21,386 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:01:21,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-20 09:01:21,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 09:01:21,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:01:21,647 WARN L260 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 600 conjunts are in the unsatisfiable core [2023-12-20 09:01:21,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:01:22,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:01:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 1155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:01:26,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:01:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 1050 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-20 09:01:32,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144804538] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:01:32,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:01:32,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 48, 33] total 206 [2023-12-20 09:01:32,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980767713] [2023-12-20 09:01:32,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:01:32,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2023-12-20 09:01:32,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:01:32,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2023-12-20 09:01:32,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1389, Invalid=40841, Unknown=0, NotChecked=0, Total=42230 [2023-12-20 09:01:32,924 INFO L87 Difference]: Start difference. First operand 181 states and 191 transitions. Second operand has 206 states, 206 states have (on average 2.5097087378640777) internal successors, (517), 206 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:02:09,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:02:09,787 INFO L93 Difference]: Finished difference Result 506 states and 549 transitions. [2023-12-20 09:02:09,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-12-20 09:02:09,788 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 2.5097087378640777) internal successors, (517), 206 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2023-12-20 09:02:09,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:02:09,789 INFO L225 Difference]: With dead ends: 506 [2023-12-20 09:02:09,789 INFO L226 Difference]: Without dead ends: 500 [2023-12-20 09:02:09,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26775 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=6575, Invalid=78981, Unknown=0, NotChecked=0, Total=85556 [2023-12-20 09:02:09,801 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 665 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 29343 mSolverCounterSat, 4698 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 34041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4698 IncrementalHoareTripleChecker+Valid, 29343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2023-12-20 09:02:09,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 263 Invalid, 34041 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4698 Valid, 29343 Invalid, 0 Unknown, 0 Unchecked, 18.0s Time] [2023-12-20 09:02:09,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2023-12-20 09:02:10,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 184. [2023-12-20 09:02:10,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.0655737704918034) internal successors, (195), 183 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:02:10,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 195 transitions. [2023-12-20 09:02:10,046 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 195 transitions. Word has length 180 [2023-12-20 09:02:10,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:02:10,046 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 195 transitions. [2023-12-20 09:02:10,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 2.5097087378640777) internal successors, (517), 206 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:02:10,047 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 195 transitions. [2023-12-20 09:02:10,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-12-20 09:02:10,047 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:02:10,047 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:02:10,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-20 09:02:10,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:02:10,250 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:02:10,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:02:10,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1904629012, now seen corresponding path program 33 times [2023-12-20 09:02:10,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:02:10,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690616075] [2023-12-20 09:02:10,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:02:10,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:02:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:02:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1170 backedges. 106 proven. 119 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2023-12-20 09:02:10,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:02:10,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690616075] [2023-12-20 09:02:10,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690616075] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:02:10,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242300292] [2023-12-20 09:02:10,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 09:02:10,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:02:10,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:02:10,955 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:02:10,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-20 09:02:11,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-20 09:02:11,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:02:11,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-20 09:02:11,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:02:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1170 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2023-12-20 09:02:11,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:02:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1170 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2023-12-20 09:02:12,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242300292] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:02:12,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:02:12,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-12-20 09:02:12,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760578205] [2023-12-20 09:02:12,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:02:12,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-20 09:02:12,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:02:12,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-20 09:02:12,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-12-20 09:02:12,352 INFO L87 Difference]: Start difference. First operand 184 states and 195 transitions. Second operand has 50 states, 50 states have (on average 1.68) internal successors, (84), 50 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:02:13,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:02:13,867 INFO L93 Difference]: Finished difference Result 517 states and 556 transitions. [2023-12-20 09:02:13,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-20 09:02:13,868 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.68) internal successors, (84), 50 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2023-12-20 09:02:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:02:13,868 INFO L225 Difference]: With dead ends: 517 [2023-12-20 09:02:13,868 INFO L226 Difference]: Without dead ends: 196 [2023-12-20 09:02:13,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 316 SyntacticMatches, 29 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2023-12-20 09:02:13,869 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 73 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 1292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1292 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 09:02:13,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 51 Invalid, 2936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1292 Valid, 1644 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 09:02:13,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-12-20 09:02:14,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 191. [2023-12-20 09:02:14,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0578947368421052) internal successors, (201), 190 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:02:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 201 transitions. [2023-12-20 09:02:14,142 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 201 transitions. Word has length 181 [2023-12-20 09:02:14,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:02:14,142 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 201 transitions. [2023-12-20 09:02:14,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.68) internal successors, (84), 50 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:02:14,142 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 201 transitions. [2023-12-20 09:02:14,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-12-20 09:02:14,143 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:02:14,143 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:02:14,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-20 09:02:14,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-20 09:02:14,351 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:02:14,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:02:14,351 INFO L85 PathProgramCache]: Analyzing trace with hash -909176170, now seen corresponding path program 34 times [2023-12-20 09:02:14,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:02:14,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527255690] [2023-12-20 09:02:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:02:14,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:02:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:02:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 91 proven. 134 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2023-12-20 09:02:15,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:02:15,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527255690] [2023-12-20 09:02:15,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527255690] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:02:15,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433909635] [2023-12-20 09:02:15,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 09:02:15,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:02:15,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:02:15,040 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:02:15,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-20 09:02:15,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 09:02:15,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:02:15,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-20 09:02:15,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:02:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2023-12-20 09:02:15,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:02:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 105 proven. 120 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2023-12-20 09:02:16,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433909635] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:02:16,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:02:16,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-12-20 09:02:16,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210766103] [2023-12-20 09:02:16,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:02:16,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-20 09:02:16,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:02:16,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-20 09:02:16,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-12-20 09:02:16,076 INFO L87 Difference]: Start difference. First operand 191 states and 201 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:02:17,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:02:17,086 INFO L93 Difference]: Finished difference Result 196 states and 206 transitions. [2023-12-20 09:02:17,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-20 09:02:17,086 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2023-12-20 09:02:17,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:02:17,087 INFO L225 Difference]: With dead ends: 196 [2023-12-20 09:02:17,087 INFO L226 Difference]: Without dead ends: 192 [2023-12-20 09:02:17,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 334 SyntacticMatches, 30 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2217 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=997, Invalid=3425, Unknown=0, NotChecked=0, Total=4422 [2023-12-20 09:02:17,088 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 876 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 876 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 09:02:17,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 23 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [876 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 09:02:17,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-12-20 09:02:17,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2023-12-20 09:02:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.057591623036649) internal successors, (202), 191 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:02:17,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 202 transitions. [2023-12-20 09:02:17,369 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 202 transitions. Word has length 190 [2023-12-20 09:02:17,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:02:17,369 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 202 transitions. [2023-12-20 09:02:17,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:02:17,369 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 202 transitions. [2023-12-20 09:02:17,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-12-20 09:02:17,369 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:02:17,370 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:02:17,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-20 09:02:17,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-20 09:02:17,579 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:02:17,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:02:17,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1916086012, now seen corresponding path program 35 times [2023-12-20 09:02:17,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:02:17,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008522601] [2023-12-20 09:02:17,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:02:17,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:02:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:03:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 194 proven. 1126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:03:31,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:03:31,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008522601] [2023-12-20 09:03:31,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008522601] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:03:31,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016697017] [2023-12-20 09:03:31,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 09:03:31,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:03:31,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:03:31,462 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:03:31,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-20 09:03:33,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-12-20 09:03:33,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:03:33,833 WARN L260 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 642 conjunts are in the unsatisfiable core [2023-12-20 09:03:33,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:03:35,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 09:03:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 1320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 09:03:39,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:03:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 1200 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-12-20 09:03:45,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016697017] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:03:45,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:03:45,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 51, 35] total 224 [2023-12-20 09:03:45,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794174443] [2023-12-20 09:03:45,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:03:45,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 224 states [2023-12-20 09:03:45,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:03:45,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2023-12-20 09:03:45,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2075, Invalid=47877, Unknown=0, NotChecked=0, Total=49952 [2023-12-20 09:03:45,268 INFO L87 Difference]: Start difference. First operand 192 states and 202 transitions. Second operand has 224 states, 224 states have (on average 2.450892857142857) internal successors, (549), 224 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:04:18,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:04:18,288 INFO L93 Difference]: Finished difference Result 596 states and 635 transitions. [2023-12-20 09:04:18,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-12-20 09:04:18,289 INFO L78 Accepts]: Start accepts. Automaton has has 224 states, 224 states have (on average 2.450892857142857) internal successors, (549), 224 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2023-12-20 09:04:18,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:04:18,290 INFO L225 Difference]: With dead ends: 596 [2023-12-20 09:04:18,290 INFO L226 Difference]: Without dead ends: 266 [2023-12-20 09:04:18,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37384 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=6947, Invalid=96415, Unknown=0, NotChecked=0, Total=103362 [2023-12-20 09:04:18,293 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 417 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 24206 mSolverCounterSat, 4259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 28465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4259 IncrementalHoareTripleChecker+Valid, 24206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2023-12-20 09:04:18,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 255 Invalid, 28465 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4259 Valid, 24206 Invalid, 0 Unknown, 0 Unchecked, 15.5s Time] [2023-12-20 09:04:18,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-12-20 09:04:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 206. [2023-12-20 09:04:18,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.0731707317073171) internal successors, (220), 205 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:04:18,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 220 transitions. [2023-12-20 09:04:18,586 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 220 transitions. Word has length 191 [2023-12-20 09:04:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:04:18,586 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 220 transitions. [2023-12-20 09:04:18,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 224 states, 224 states have (on average 2.450892857142857) internal successors, (549), 224 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:04:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 220 transitions. [2023-12-20 09:04:18,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-12-20 09:04:18,587 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:04:18,587 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:04:18,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-12-20 09:04:18,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-20 09:04:18,796 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:04:18,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:04:18,797 INFO L85 PathProgramCache]: Analyzing trace with hash -48632954, now seen corresponding path program 36 times [2023-12-20 09:04:18,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:04:18,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915272720] [2023-12-20 09:04:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:04:18,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:04:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:04:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 105 proven. 151 refuted. 0 times theorem prover too weak. 1160 trivial. 0 not checked. [2023-12-20 09:04:19,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:04:19,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915272720] [2023-12-20 09:04:19,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915272720] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:04:19,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085718529] [2023-12-20 09:04:19,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 09:04:19,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:04:19,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:04:19,528 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:04:19,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-20 09:04:20,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-12-20 09:04:20,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:04:20,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-20 09:04:20,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:04:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 1160 trivial. 0 not checked. [2023-12-20 09:04:21,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:04:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 1160 trivial. 0 not checked. [2023-12-20 09:04:22,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085718529] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:04:22,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:04:22,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 84 [2023-12-20 09:04:22,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802545055] [2023-12-20 09:04:22,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:04:22,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-12-20 09:04:22,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:04:22,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-12-20 09:04:22,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=5916, Unknown=0, NotChecked=0, Total=6972 [2023-12-20 09:04:22,115 INFO L87 Difference]: Start difference. First operand 206 states and 220 transitions. Second operand has 84 states, 84 states have (on average 1.6071428571428572) internal successors, (135), 84 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:04:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:04:23,885 INFO L93 Difference]: Finished difference Result 355 states and 385 transitions. [2023-12-20 09:04:23,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-20 09:04:23,886 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.6071428571428572) internal successors, (135), 84 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2023-12-20 09:04:23,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:04:23,886 INFO L225 Difference]: With dead ends: 355 [2023-12-20 09:04:23,886 INFO L226 Difference]: Without dead ends: 203 [2023-12-20 09:04:23,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 345 SyntacticMatches, 17 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4693 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1823, Invalid=11749, Unknown=0, NotChecked=0, Total=13572 [2023-12-20 09:04:23,888 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 236 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 1445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 3976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1445 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 09:04:23,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 42 Invalid, 3976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1445 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 09:04:23,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-12-20 09:04:24,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2023-12-20 09:04:24,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.0544554455445545) internal successors, (213), 202 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:04:24,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 213 transitions. [2023-12-20 09:04:24,198 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 213 transitions. Word has length 197 [2023-12-20 09:04:24,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:04:24,198 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 213 transitions. [2023-12-20 09:04:24,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.6071428571428572) internal successors, (135), 84 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 09:04:24,198 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 213 transitions. [2023-12-20 09:04:24,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-12-20 09:04:24,199 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:04:24,199 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:04:24,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-12-20 09:04:24,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-20 09:04:24,407 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:04:24,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:04:24,407 INFO L85 PathProgramCache]: Analyzing trace with hash -213109178, now seen corresponding path program 37 times [2023-12-20 09:04:24,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:04:24,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612235352] [2023-12-20 09:04:24,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:04:24,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:04:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2023-12-20 09:04:58,772 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 09:04:59,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown