/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 true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 19:54:41,520 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 19:54:41,582 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 19:54:41,585 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 19:54:41,585 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 19:54:41,604 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 19:54:41,604 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 19:54:41,604 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 19:54:41,605 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 19:54:41,608 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 19:54:41,608 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 19:54:41,608 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 19:54:41,609 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 19:54:41,610 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 19:54:41,610 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 19:54:41,610 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 19:54:41,610 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 19:54:41,610 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 19:54:41,610 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 19:54:41,611 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 19:54:41,611 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 19:54:41,611 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 19:54:41,611 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 19:54:41,611 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 19:54:41,611 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 19:54:41,611 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 19:54:41,612 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 19:54:41,612 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 19:54:41,612 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 19:54:41,612 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 19:54:41,613 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 19:54:41,613 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 19:54:41,613 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 19:54:41,613 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 19:54:41,613 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 19:54:41,614 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 19:54:41,614 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 19:54:41,614 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 19:54:41,614 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 19:54:41,614 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 19:54:41,614 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 19:54:41,614 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 19:54:41,614 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 19:54:41,614 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 19:54:41,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 19:54:41,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 19:54:41,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 19:54:41,792 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 19:54:41,792 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 19:54:41,793 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c [2023-12-19 19:54:42,732 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 19:54:42,878 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 19:54:42,879 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c [2023-12-19 19:54:42,884 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/573fa3751/74c72c5e89c14167842c4061f2fc86d8/FLAG84278890c [2023-12-19 19:54:42,896 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/573fa3751/74c72c5e89c14167842c4061f2fc86d8 [2023-12-19 19:54:42,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 19:54:42,899 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 19:54:42,901 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 19:54:42,901 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 19:54:42,905 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 19:54:42,906 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 07:54:42" (1/1) ... [2023-12-19 19:54:42,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27ad2904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:42, skipping insertion in model container [2023-12-19 19:54:42,906 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 07:54:42" (1/1) ... [2023-12-19 19:54:42,923 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 19:54:43,029 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c[490,503] [2023-12-19 19:54:43,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 19:54:43,046 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 19:54:43,053 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c[490,503] [2023-12-19 19:54:43,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 19:54:43,068 INFO L206 MainTranslator]: Completed translation [2023-12-19 19:54:43,068 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:43 WrapperNode [2023-12-19 19:54:43,068 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 19:54:43,069 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 19:54:43,069 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 19:54:43,069 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 19:54:43,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:43" (1/1) ... [2023-12-19 19:54:43,078 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:43" (1/1) ... [2023-12-19 19:54:43,090 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2023-12-19 19:54:43,090 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 19:54:43,090 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 19:54:43,090 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 19:54:43,091 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 19:54:43,096 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:43" (1/1) ... [2023-12-19 19:54:43,097 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:43" (1/1) ... [2023-12-19 19:54:43,098 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:43" (1/1) ... [2023-12-19 19:54:43,104 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-19 19:54:43,104 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:43" (1/1) ... [2023-12-19 19:54:43,105 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:43" (1/1) ... [2023-12-19 19:54:43,118 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:43" (1/1) ... [2023-12-19 19:54:43,120 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:43" (1/1) ... [2023-12-19 19:54:43,120 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:43" (1/1) ... [2023-12-19 19:54:43,121 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:43" (1/1) ... [2023-12-19 19:54:43,122 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 19:54:43,122 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 19:54:43,122 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 19:54:43,122 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 19:54:43,123 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:43" (1/1) ... [2023-12-19 19:54:43,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 19:54:43,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:43,159 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) [2023-12-19 19:54:43,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 19:54:43,183 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-19 19:54:43,183 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-19 19:54:43,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 19:54:43,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 19:54:43,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 19:54:43,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-19 19:54:43,184 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 [2023-12-19 19:54:43,184 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-19 19:54:43,228 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 19:54:43,229 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 19:54:43,385 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 19:54:43,411 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 19:54:43,411 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-19 19:54:43,412 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 07:54:43 BoogieIcfgContainer [2023-12-19 19:54:43,412 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 19:54:43,413 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 19:54:43,413 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 19:54:43,415 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 19:54:43,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 07:54:42" (1/3) ... [2023-12-19 19:54:43,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277a54f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 07:54:43, skipping insertion in model container [2023-12-19 19:54:43,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:54:43" (2/3) ... [2023-12-19 19:54:43,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277a54f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 07:54:43, skipping insertion in model container [2023-12-19 19:54:43,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 07:54:43" (3/3) ... [2023-12-19 19:54:43,437 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound5.c [2023-12-19 19:54:43,449 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 19:54:43,449 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 19:54:43,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 19:54:43,508 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;@2244e504, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 19:54:43,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 19:54:43,511 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-19 19:54:43,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-19 19:54:43,517 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:43,518 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:54:43,519 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:43,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:43,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1865535902, now seen corresponding path program 1 times [2023-12-19 19:54:43,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:43,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714078501] [2023-12-19 19:54:43,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:43,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:43,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:43,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714078501] [2023-12-19 19:54:43,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-19 19:54:43,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30751710] [2023-12-19 19:54:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:43,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:43,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:43,636 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) [2023-12-19 19:54:43,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 19:54:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:43,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-19 19:54:43,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:43,728 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-19 19:54:43,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 19:54:43,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30751710] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 19:54:43,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 19:54:43,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 19:54:43,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706346911] [2023-12-19 19:54:43,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:54:43,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 19:54:43,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:43,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 19:54:43,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 19:54:43,751 INFO L87 Difference]: Start difference. First operand has 32 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-19 19:54:43,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:43,769 INFO L93 Difference]: Finished difference Result 62 states and 107 transitions. [2023-12-19 19:54:43,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 19:54:43,771 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2023-12-19 19:54:43,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:43,776 INFO L225 Difference]: With dead ends: 62 [2023-12-19 19:54:43,777 INFO L226 Difference]: Without dead ends: 30 [2023-12-19 19:54:43,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 19:54:43,781 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:43,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:54:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-19 19:54:43,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-12-19 19:54:43,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-19 19:54:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2023-12-19 19:54:43,806 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 38 [2023-12-19 19:54:43,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:43,806 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2023-12-19 19:54:43,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-19 19:54:43,806 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2023-12-19 19:54:43,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-19 19:54:43,807 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:43,808 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:54:43,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-19 19:54:44,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-19 19:54:44,013 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:44,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:44,013 INFO L85 PathProgramCache]: Analyzing trace with hash -279596905, now seen corresponding path program 1 times [2023-12-19 19:54:44,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:44,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177734572] [2023-12-19 19:54:44,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:44,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:44,049 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:44,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528094737] [2023-12-19 19:54:44,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:44,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:44,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:44,062 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) [2023-12-19 19:54:44,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 19:54:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:44,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 19:54:44,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-19 19:54:44,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-19 19:54:44,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:44,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177734572] [2023-12-19 19:54:44,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:44,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528094737] [2023-12-19 19:54:44,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528094737] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:54:44,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:54:44,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-12-19 19:54:44,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495959467] [2023-12-19 19:54:44,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:54:44,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 19:54:44,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:44,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 19:54:44,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-19 19:54:44,285 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-19 19:54:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:44,380 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2023-12-19 19:54:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 19:54:44,380 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2023-12-19 19:54:44,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:44,381 INFO L225 Difference]: With dead ends: 47 [2023-12-19 19:54:44,381 INFO L226 Difference]: Without dead ends: 39 [2023-12-19 19:54:44,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-19 19:54:44,383 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:44,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 134 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 19:54:44,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-19 19:54:44,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2023-12-19 19:54:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-19 19:54:44,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2023-12-19 19:54:44,390 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 39 [2023-12-19 19:54:44,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:44,390 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2023-12-19 19:54:44,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-19 19:54:44,390 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2023-12-19 19:54:44,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-19 19:54:44,391 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:44,391 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-19 19:54:44,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 19:54:44,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-19 19:54:44,596 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:44,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:44,597 INFO L85 PathProgramCache]: Analyzing trace with hash -76887146, now seen corresponding path program 1 times [2023-12-19 19:54:44,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:44,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450517745] [2023-12-19 19:54:44,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:44,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:44,606 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:44,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505454013] [2023-12-19 19:54:44,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:44,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:44,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:44,608 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) [2023-12-19 19:54:44,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 19:54:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:44,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-19 19:54:44,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-19 19:54:44,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-19 19:54:44,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:44,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450517745] [2023-12-19 19:54:44,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:44,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505454013] [2023-12-19 19:54:44,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505454013] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 19:54:44,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:54:44,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-12-19 19:54:44,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786483198] [2023-12-19 19:54:44,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:54:44,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 19:54:44,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:44,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 19:54:44,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-12-19 19:54:44,788 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-19 19:54:44,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:44,823 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-12-19 19:54:44,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 19:54:44,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2023-12-19 19:54:44,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:44,824 INFO L225 Difference]: With dead ends: 38 [2023-12-19 19:54:44,824 INFO L226 Difference]: Without dead ends: 36 [2023-12-19 19:54:44,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-12-19 19:54:44,825 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:44,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:54:44,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-19 19:54:44,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-19 19:54:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-19 19:54:44,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-12-19 19:54:44,832 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 40 [2023-12-19 19:54:44,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:44,832 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-12-19 19:54:44,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-19 19:54:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-12-19 19:54:44,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-19 19:54:44,833 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:44,833 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2023-12-19 19:54:44,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 19:54:45,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:45,039 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:45,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:45,039 INFO L85 PathProgramCache]: Analyzing trace with hash 345761675, now seen corresponding path program 1 times [2023-12-19 19:54:45,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:45,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634296319] [2023-12-19 19:54:45,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:45,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:45,050 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:45,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636727528] [2023-12-19 19:54:45,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:45,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:45,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:45,057 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) [2023-12-19 19:54:45,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 19:54:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:45,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-19 19:54:45,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-19 19:54:45,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-19 19:54:45,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:45,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634296319] [2023-12-19 19:54:45,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:45,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636727528] [2023-12-19 19:54:45,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636727528] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 19:54:45,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:54:45,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 15 [2023-12-19 19:54:45,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562089749] [2023-12-19 19:54:45,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:54:45,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 19:54:45,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:45,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 19:54:45,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-12-19 19:54:45,468 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-19 19:54:45,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:45,524 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2023-12-19 19:54:45,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 19:54:45,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2023-12-19 19:54:45,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:45,525 INFO L225 Difference]: With dead ends: 49 [2023-12-19 19:54:45,525 INFO L226 Difference]: Without dead ends: 47 [2023-12-19 19:54:45,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-12-19 19:54:45,526 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:45,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 166 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:54:45,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-19 19:54:45,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-12-19 19:54:45,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-19 19:54:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-12-19 19:54:45,537 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 45 [2023-12-19 19:54:45,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:45,537 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-12-19 19:54:45,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-19 19:54:45,537 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-12-19 19:54:45,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-19 19:54:45,538 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:45,538 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 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] [2023-12-19 19:54:45,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 19:54:45,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:45,745 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:45,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:45,746 INFO L85 PathProgramCache]: Analyzing trace with hash -954985354, now seen corresponding path program 1 times [2023-12-19 19:54:45,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:45,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008315151] [2023-12-19 19:54:45,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:45,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:45,754 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:45,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624595845] [2023-12-19 19:54:45,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:45,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:45,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:45,760 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) [2023-12-19 19:54:45,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 19:54:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:45,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-19 19:54:45,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-19 19:54:45,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-19 19:54:45,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:45,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008315151] [2023-12-19 19:54:45,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:45,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624595845] [2023-12-19 19:54:45,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624595845] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 19:54:45,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:54:45,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-12-19 19:54:45,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613598247] [2023-12-19 19:54:45,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:54:45,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 19:54:45,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:45,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 19:54:45,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-19 19:54:45,955 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-19 19:54:45,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:45,989 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2023-12-19 19:54:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 19:54:45,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2023-12-19 19:54:45,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:45,990 INFO L225 Difference]: With dead ends: 53 [2023-12-19 19:54:45,990 INFO L226 Difference]: Without dead ends: 51 [2023-12-19 19:54:45,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-19 19:54:45,990 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:45,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 127 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:54:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-19 19:54:46,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2023-12-19 19:54:46,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-19 19:54:46,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2023-12-19 19:54:46,001 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 50 [2023-12-19 19:54:46,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:46,001 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2023-12-19 19:54:46,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-19 19:54:46,001 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2023-12-19 19:54:46,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-19 19:54:46,002 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:46,002 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 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, 1] [2023-12-19 19:54:46,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 19:54:46,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:46,206 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:46,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:46,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2047387093, now seen corresponding path program 1 times [2023-12-19 19:54:46,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:46,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071502865] [2023-12-19 19:54:46,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:46,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:46,219 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:46,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829359050] [2023-12-19 19:54:46,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:46,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:46,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:46,229 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) [2023-12-19 19:54:46,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 19:54:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:46,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-19 19:54:46,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-19 19:54:46,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:46,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:46,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071502865] [2023-12-19 19:54:46,479 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:46,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829359050] [2023-12-19 19:54:46,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829359050] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 19:54:46,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:54:46,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-12-19 19:54:46,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500299230] [2023-12-19 19:54:46,480 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 19:54:46,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 19:54:46,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:46,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 19:54:46,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-12-19 19:54:46,481 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-19 19:54:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:46,555 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2023-12-19 19:54:46,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 19:54:46,555 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2023-12-19 19:54:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:46,556 INFO L225 Difference]: With dead ends: 57 [2023-12-19 19:54:46,556 INFO L226 Difference]: Without dead ends: 55 [2023-12-19 19:54:46,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-19 19:54:46,557 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:46,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 146 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 19:54:46,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-19 19:54:46,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2023-12-19 19:54:46,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-19 19:54:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2023-12-19 19:54:46,565 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 55 [2023-12-19 19:54:46,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:46,565 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2023-12-19 19:54:46,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-19 19:54:46,565 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2023-12-19 19:54:46,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-19 19:54:46,566 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:46,566 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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] [2023-12-19 19:54:46,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 19:54:46,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:46,770 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:46,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:46,771 INFO L85 PathProgramCache]: Analyzing trace with hash 392643903, now seen corresponding path program 1 times [2023-12-19 19:54:46,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:46,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919702726] [2023-12-19 19:54:46,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:46,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:46,779 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:46,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399068888] [2023-12-19 19:54:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:46,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:46,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:46,780 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) [2023-12-19 19:54:46,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 19:54:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:46,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-19 19:54:46,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-19 19:54:46,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-19 19:54:46,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:46,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919702726] [2023-12-19 19:54:46,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:46,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399068888] [2023-12-19 19:54:46,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399068888] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:54:46,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:54:46,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-12-19 19:54:46,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835123042] [2023-12-19 19:54:46,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:54:46,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-19 19:54:46,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:46,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-19 19:54:46,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-19 19:54:46,922 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-19 19:54:47,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:47,039 INFO L93 Difference]: Finished difference Result 101 states and 141 transitions. [2023-12-19 19:54:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 19:54:47,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2023-12-19 19:54:47,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:47,041 INFO L225 Difference]: With dead ends: 101 [2023-12-19 19:54:47,041 INFO L226 Difference]: Without dead ends: 93 [2023-12-19 19:54:47,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-12-19 19:54:47,041 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 36 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:47,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 281 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 19:54:47,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-19 19:54:47,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2023-12-19 19:54:47,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-12-19 19:54:47,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2023-12-19 19:54:47,069 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 64 [2023-12-19 19:54:47,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:47,069 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2023-12-19 19:54:47,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-19 19:54:47,070 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2023-12-19 19:54:47,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-19 19:54:47,070 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:47,070 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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] [2023-12-19 19:54:47,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-19 19:54:47,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:47,283 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:47,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:47,284 INFO L85 PathProgramCache]: Analyzing trace with hash -45785549, now seen corresponding path program 1 times [2023-12-19 19:54:47,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:47,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000646455] [2023-12-19 19:54:47,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:47,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:47,291 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:47,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027494971] [2023-12-19 19:54:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:47,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:47,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:47,293 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) [2023-12-19 19:54:47,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 19:54:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:54:47,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-19 19:54:47,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-12-19 19:54:47,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-12-19 19:54:47,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:47,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000646455] [2023-12-19 19:54:47,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:47,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027494971] [2023-12-19 19:54:47,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027494971] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:54:47,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:54:47,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2023-12-19 19:54:47,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120142434] [2023-12-19 19:54:47,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:54:47,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 19:54:47,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:47,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 19:54:47,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-12-19 19:54:47,453 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-19 19:54:47,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:47,555 INFO L93 Difference]: Finished difference Result 94 states and 129 transitions. [2023-12-19 19:54:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 19:54:47,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 70 [2023-12-19 19:54:47,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:47,557 INFO L225 Difference]: With dead ends: 94 [2023-12-19 19:54:47,557 INFO L226 Difference]: Without dead ends: 91 [2023-12-19 19:54:47,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-12-19 19:54:47,558 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:47,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 148 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 19:54:47,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-19 19:54:47,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-12-19 19:54:47,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-12-19 19:54:47,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 125 transitions. [2023-12-19 19:54:47,575 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 125 transitions. Word has length 70 [2023-12-19 19:54:47,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:47,575 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 125 transitions. [2023-12-19 19:54:47,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-19 19:54:47,575 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 125 transitions. [2023-12-19 19:54:47,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-19 19:54:47,576 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:47,576 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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] [2023-12-19 19:54:47,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-19 19:54:47,780 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,SelfDestructingSolverStorable7 [2023-12-19 19:54:47,780 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:47,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:47,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1519552206, now seen corresponding path program 2 times [2023-12-19 19:54:47,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:47,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605638105] [2023-12-19 19:54:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:47,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:47,801 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:47,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187619509] [2023-12-19 19:54:47,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 19:54:47,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:47,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:47,808 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) [2023-12-19 19:54:47,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 19:54:47,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 19:54:47,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:54:47,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-19 19:54:47,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-19 19:54:48,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:48,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:48,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605638105] [2023-12-19 19:54:48,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:48,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187619509] [2023-12-19 19:54:48,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187619509] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 19:54:48,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:54:48,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-19 19:54:48,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003373533] [2023-12-19 19:54:48,754 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 19:54:48,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 19:54:48,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:48,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 19:54:48,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-12-19 19:54:48,761 INFO L87 Difference]: Start difference. First operand 91 states and 125 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-19 19:54:49,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:49,005 INFO L93 Difference]: Finished difference Result 123 states and 164 transitions. [2023-12-19 19:54:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 19:54:49,006 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 75 [2023-12-19 19:54:49,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:49,007 INFO L225 Difference]: With dead ends: 123 [2023-12-19 19:54:49,007 INFO L226 Difference]: Without dead ends: 121 [2023-12-19 19:54:49,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2023-12-19 19:54:49,007 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:49,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 218 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 19:54:49,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-12-19 19:54:49,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2023-12-19 19:54:49,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 67 states have internal predecessors, (76), 42 states have call successors, (42), 10 states have call predecessors, (42), 10 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2023-12-19 19:54:49,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 159 transitions. [2023-12-19 19:54:49,032 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 159 transitions. Word has length 75 [2023-12-19 19:54:49,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:49,033 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 159 transitions. [2023-12-19 19:54:49,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-19 19:54:49,033 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 159 transitions. [2023-12-19 19:54:49,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-19 19:54:49,036 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:49,036 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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] [2023-12-19 19:54:49,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-19 19:54:49,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:49,240 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:49,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:49,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1881497901, now seen corresponding path program 3 times [2023-12-19 19:54:49,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:49,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436117635] [2023-12-19 19:54:49,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:49,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:49,257 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:49,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105783539] [2023-12-19 19:54:49,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 19:54:49,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:49,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:49,263 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) [2023-12-19 19:54:49,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 19:54:49,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-19 19:54:49,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:54:49,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-19 19:54:49,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-19 19:54:49,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:55:03,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:55:03,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436117635] [2023-12-19 19:55:03,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:55:03,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105783539] [2023-12-19 19:55:03,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105783539] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 19:55:03,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:55:03,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-19 19:55:03,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951654980] [2023-12-19 19:55:03,481 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 19:55:03,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 19:55:03,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:55:03,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 19:55:03,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2023-12-19 19:55:03,482 INFO L87 Difference]: Start difference. First operand 118 states and 159 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-12-19 19:55:03,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:55:03,836 INFO L93 Difference]: Finished difference Result 127 states and 167 transitions. [2023-12-19 19:55:03,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-19 19:55:03,837 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2023-12-19 19:55:03,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:55:03,838 INFO L225 Difference]: With dead ends: 127 [2023-12-19 19:55:03,838 INFO L226 Difference]: Without dead ends: 125 [2023-12-19 19:55:03,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2023-12-19 19:55:03,838 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 41 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 19:55:03,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 223 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 19:55:03,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-12-19 19:55:03,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2023-12-19 19:55:03,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 68 states have (on average 1.161764705882353) internal successors, (79), 70 states have internal predecessors, (79), 42 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2023-12-19 19:55:03,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 162 transitions. [2023-12-19 19:55:03,854 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 162 transitions. Word has length 80 [2023-12-19 19:55:03,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:55:03,854 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 162 transitions. [2023-12-19 19:55:03,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-12-19 19:55:03,854 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 162 transitions. [2023-12-19 19:55:03,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-19 19:55:03,855 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:55:03,855 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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] [2023-12-19 19:55:03,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-19 19:55:04,060 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,SelfDestructingSolverStorable9 [2023-12-19 19:55:04,060 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:55:04,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:55:04,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1305329662, now seen corresponding path program 1 times [2023-12-19 19:55:04,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:55:04,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355412320] [2023-12-19 19:55:04,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:55:04,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:55:04,074 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:55:04,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260556538] [2023-12-19 19:55:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:55:04,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:55:04,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:55:04,084 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) [2023-12-19 19:55:04,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 19:55:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:55:04,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-19 19:55:04,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:55:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-12-19 19:55:04,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:55:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-12-19 19:55:05,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:55:05,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355412320] [2023-12-19 19:55:05,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:55:05,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260556538] [2023-12-19 19:55:05,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260556538] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:55:05,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:55:05,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-12-19 19:55:05,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333019450] [2023-12-19 19:55:05,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:55:05,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-19 19:55:05,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:55:05,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-19 19:55:05,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-12-19 19:55:05,220 INFO L87 Difference]: Start difference. First operand 122 states and 162 transitions. Second operand has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2023-12-19 19:55:13,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:55:13,599 INFO L93 Difference]: Finished difference Result 207 states and 294 transitions. [2023-12-19 19:55:13,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-19 19:55:13,599 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 86 [2023-12-19 19:55:13,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:55:13,600 INFO L225 Difference]: With dead ends: 207 [2023-12-19 19:55:13,600 INFO L226 Difference]: Without dead ends: 203 [2023-12-19 19:55:13,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=339, Invalid=1467, Unknown=0, NotChecked=0, Total=1806 [2023-12-19 19:55:13,601 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 113 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:55:13,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 560 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-19 19:55:13,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-12-19 19:55:13,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2023-12-19 19:55:13,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 105 states have (on average 1.2) internal successors, (126), 106 states have internal predecessors, (126), 79 states have call successors, (79), 14 states have call predecessors, (79), 14 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-12-19 19:55:13,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 283 transitions. [2023-12-19 19:55:13,685 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 283 transitions. Word has length 86 [2023-12-19 19:55:13,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:55:13,686 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 283 transitions. [2023-12-19 19:55:13,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2023-12-19 19:55:13,687 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 283 transitions. [2023-12-19 19:55:13,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-19 19:55:13,687 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:55:13,688 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:55:13,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-19 19:55:13,892 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,SelfDestructingSolverStorable10 [2023-12-19 19:55:13,892 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:55:13,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:55:13,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2056054646, now seen corresponding path program 4 times [2023-12-19 19:55:13,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:55:13,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565469109] [2023-12-19 19:55:13,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:55:13,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:55:13,910 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:55:13,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204940391] [2023-12-19 19:55:13,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 19:55:13,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:55:13,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:55:13,920 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) [2023-12-19 19:55:13,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-19 19:55:13,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 19:55:13,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:55:13,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-19 19:55:13,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:55:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-12-19 19:55:14,005 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 19:55:14,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:55:14,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565469109] [2023-12-19 19:55:14,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:55:14,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204940391] [2023-12-19 19:55:14,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204940391] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 19:55:14,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 19:55:14,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 19:55:14,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813636537] [2023-12-19 19:55:14,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:55:14,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 19:55:14,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:55:14,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 19:55:14,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 19:55:14,007 INFO L87 Difference]: Start difference. First operand 199 states and 283 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-19 19:55:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:55:14,099 INFO L93 Difference]: Finished difference Result 252 states and 355 transitions. [2023-12-19 19:55:14,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 19:55:14,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2023-12-19 19:55:14,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:55:14,100 INFO L225 Difference]: With dead ends: 252 [2023-12-19 19:55:14,100 INFO L226 Difference]: Without dead ends: 180 [2023-12-19 19:55:14,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-19 19:55:14,103 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:55:14,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 158 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:55:14,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-12-19 19:55:14,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 166. [2023-12-19 19:55:14,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 89 states have internal predecessors, (101), 63 states have call successors, (63), 14 states have call predecessors, (63), 14 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-12-19 19:55:14,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 226 transitions. [2023-12-19 19:55:14,140 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 226 transitions. Word has length 100 [2023-12-19 19:55:14,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:55:14,141 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 226 transitions. [2023-12-19 19:55:14,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-12-19 19:55:14,142 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 226 transitions. [2023-12-19 19:55:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-19 19:55:14,143 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:55:14,143 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:55:14,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-19 19:55:14,347 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,SelfDestructingSolverStorable11 [2023-12-19 19:55:14,347 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:55:14,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:55:14,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1556724626, now seen corresponding path program 1 times [2023-12-19 19:55:14,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:55:14,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266373411] [2023-12-19 19:55:14,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:55:14,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:55:14,355 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:55:14,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325971573] [2023-12-19 19:55:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:55:14,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:55:14,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:55:14,358 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) [2023-12-19 19:55:14,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-19 19:55:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:55:14,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-19 19:55:14,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:55:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 57 proven. 28 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-19 19:55:15,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:55:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-12-19 19:55:15,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:55:15,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266373411] [2023-12-19 19:55:15,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:55:15,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325971573] [2023-12-19 19:55:15,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325971573] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:55:15,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:55:15,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-12-19 19:55:15,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643638225] [2023-12-19 19:55:15,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:55:15,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-19 19:55:15,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:55:15,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-19 19:55:15,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-12-19 19:55:15,917 INFO L87 Difference]: Start difference. First operand 166 states and 226 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2023-12-19 19:55:25,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:55:31,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:55:32,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:55:32,888 INFO L93 Difference]: Finished difference Result 208 states and 286 transitions. [2023-12-19 19:55:32,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-19 19:55:32,888 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 102 [2023-12-19 19:55:32,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:55:32,889 INFO L225 Difference]: With dead ends: 208 [2023-12-19 19:55:32,890 INFO L226 Difference]: Without dead ends: 206 [2023-12-19 19:55:32,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=333, Invalid=1226, Unknown=1, NotChecked=0, Total=1560 [2023-12-19 19:55:32,891 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 97 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-12-19 19:55:32,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 331 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2023-12-19 19:55:32,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-12-19 19:55:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 196. [2023-12-19 19:55:32,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 105 states have (on average 1.1428571428571428) internal successors, (120), 107 states have internal predecessors, (120), 75 states have call successors, (75), 15 states have call predecessors, (75), 15 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2023-12-19 19:55:32,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 269 transitions. [2023-12-19 19:55:32,960 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 269 transitions. Word has length 102 [2023-12-19 19:55:32,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:55:32,960 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 269 transitions. [2023-12-19 19:55:32,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2023-12-19 19:55:32,960 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 269 transitions. [2023-12-19 19:55:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-19 19:55:32,961 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:55:32,961 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:55:32,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-19 19:55:33,165 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,SelfDestructingSolverStorable12 [2023-12-19 19:55:33,166 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:55:33,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:55:33,166 INFO L85 PathProgramCache]: Analyzing trace with hash 457852880, now seen corresponding path program 2 times [2023-12-19 19:55:33,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:55:33,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647648831] [2023-12-19 19:55:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:55:33,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:55:33,172 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:55:33,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228710967] [2023-12-19 19:55:33,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 19:55:33,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:55:33,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:55:33,174 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) [2023-12-19 19:55:33,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-19 19:55:33,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 19:55:33,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:55:33,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-19 19:55:33,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:55:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 31 proven. 53 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2023-12-19 19:55:33,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:55:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2023-12-19 19:55:34,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:55:34,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647648831] [2023-12-19 19:55:34,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:55:34,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228710967] [2023-12-19 19:55:34,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228710967] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:55:34,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:55:34,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2023-12-19 19:55:34,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848675332] [2023-12-19 19:55:34,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:55:34,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-19 19:55:34,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:55:34,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-19 19:55:34,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-12-19 19:55:34,834 INFO L87 Difference]: Start difference. First operand 196 states and 269 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 21 states have internal predecessors, (43), 13 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) [2023-12-19 19:55:42,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:55:42,175 INFO L93 Difference]: Finished difference Result 320 states and 463 transitions. [2023-12-19 19:55:42,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-19 19:55:42,175 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 21 states have internal predecessors, (43), 13 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) Word has length 119 [2023-12-19 19:55:42,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:55:42,186 INFO L225 Difference]: With dead ends: 320 [2023-12-19 19:55:42,186 INFO L226 Difference]: Without dead ends: 318 [2023-12-19 19:55:42,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=509, Invalid=1747, Unknown=0, NotChecked=0, Total=2256 [2023-12-19 19:55:42,187 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 119 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:55:42,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 551 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-19 19:55:42,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-12-19 19:55:42,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 312. [2023-12-19 19:55:42,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 158 states have (on average 1.1772151898734178) internal successors, (186), 161 states have internal predecessors, (186), 135 states have call successors, (135), 18 states have call predecessors, (135), 18 states have return successors, (134), 132 states have call predecessors, (134), 134 states have call successors, (134) [2023-12-19 19:55:42,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 455 transitions. [2023-12-19 19:55:42,365 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 455 transitions. Word has length 119 [2023-12-19 19:55:42,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:55:42,365 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 455 transitions. [2023-12-19 19:55:42,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 21 states have internal predecessors, (43), 13 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (40), 13 states have call predecessors, (40), 13 states have call successors, (40) [2023-12-19 19:55:42,365 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 455 transitions. [2023-12-19 19:55:42,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-19 19:55:42,366 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:55:42,366 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:55:42,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-19 19:55:42,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:55:42,571 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:55:42,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:55:42,571 INFO L85 PathProgramCache]: Analyzing trace with hash -2126175913, now seen corresponding path program 3 times [2023-12-19 19:55:42,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:55:42,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99497354] [2023-12-19 19:55:42,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:55:42,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:55:42,577 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:55:42,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891262103] [2023-12-19 19:55:42,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 19:55:42,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:55:42,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:55:42,581 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) [2023-12-19 19:55:42,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-19 19:55:42,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-19 19:55:42,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:55:42,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-19 19:55:42,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:55:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 81 proven. 38 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-12-19 19:55:43,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:55:43,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:55:43,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99497354] [2023-12-19 19:55:43,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:55:43,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891262103] [2023-12-19 19:55:43,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891262103] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 19:55:43,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:55:43,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-19 19:55:43,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672738660] [2023-12-19 19:55:43,084 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 19:55:43,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 19:55:43,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:55:43,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 19:55:43,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2023-12-19 19:55:43,084 INFO L87 Difference]: Start difference. First operand 312 states and 455 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2023-12-19 19:55:43,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:55:43,602 INFO L93 Difference]: Finished difference Result 353 states and 507 transitions. [2023-12-19 19:55:43,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-19 19:55:43,602 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 122 [2023-12-19 19:55:43,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:55:43,604 INFO L225 Difference]: With dead ends: 353 [2023-12-19 19:55:43,604 INFO L226 Difference]: Without dead ends: 351 [2023-12-19 19:55:43,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2023-12-19 19:55:43,605 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 30 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 19:55:43,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 473 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 19:55:43,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-12-19 19:55:43,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 345. [2023-12-19 19:55:43,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 176 states have (on average 1.1704545454545454) internal successors, (206), 179 states have internal predecessors, (206), 147 states have call successors, (147), 21 states have call predecessors, (147), 21 states have return successors, (146), 144 states have call predecessors, (146), 146 states have call successors, (146) [2023-12-19 19:55:43,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 499 transitions. [2023-12-19 19:55:43,788 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 499 transitions. Word has length 122 [2023-12-19 19:55:43,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:55:43,788 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 499 transitions. [2023-12-19 19:55:43,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2023-12-19 19:55:43,788 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 499 transitions. [2023-12-19 19:55:43,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-12-19 19:55:43,789 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:55:43,790 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:55:43,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-19 19:55:43,994 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,SelfDestructingSolverStorable14 [2023-12-19 19:55:43,994 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:55:43,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:55:43,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1600677333, now seen corresponding path program 2 times [2023-12-19 19:55:43,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:55:43,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480510118] [2023-12-19 19:55:43,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:55:43,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:55:44,001 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:55:44,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552255228] [2023-12-19 19:55:44,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 19:55:44,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:55:44,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:55:44,002 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) [2023-12-19 19:55:44,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-19 19:55:44,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 19:55:44,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:55:44,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 74 conjunts are in the unsatisfiable core [2023-12-19 19:55:44,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:55:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 79 proven. 65 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2023-12-19 19:55:44,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:55:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-12-19 19:55:46,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:55:46,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480510118] [2023-12-19 19:55:46,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:55:46,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552255228] [2023-12-19 19:55:46,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552255228] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:55:46,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:55:46,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 32 [2023-12-19 19:55:46,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876312491] [2023-12-19 19:55:46,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:55:46,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-19 19:55:46,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:55:46,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-19 19:55:46,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2023-12-19 19:55:46,651 INFO L87 Difference]: Start difference. First operand 345 states and 499 transitions. Second operand has 32 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 16 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (43), 14 states have call predecessors, (43), 14 states have call successors, (43) [2023-12-19 19:56:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:56:00,807 INFO L93 Difference]: Finished difference Result 430 states and 618 transitions. [2023-12-19 19:56:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-19 19:56:00,807 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 16 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (43), 14 states have call predecessors, (43), 14 states have call successors, (43) Word has length 133 [2023-12-19 19:56:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:56:00,809 INFO L225 Difference]: With dead ends: 430 [2023-12-19 19:56:00,809 INFO L226 Difference]: Without dead ends: 422 [2023-12-19 19:56:00,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=862, Invalid=3830, Unknown=0, NotChecked=0, Total=4692 [2023-12-19 19:56:00,811 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 178 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-12-19 19:56:00,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 781 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-12-19 19:56:00,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-12-19 19:56:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 406. [2023-12-19 19:56:01,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 205 states have (on average 1.170731707317073) internal successors, (240), 208 states have internal predecessors, (240), 175 states have call successors, (175), 25 states have call predecessors, (175), 25 states have return successors, (174), 172 states have call predecessors, (174), 174 states have call successors, (174) [2023-12-19 19:56:01,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 589 transitions. [2023-12-19 19:56:01,080 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 589 transitions. Word has length 133 [2023-12-19 19:56:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:56:01,081 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 589 transitions. [2023-12-19 19:56:01,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 16 states have call successors, (44), 3 states have call predecessors, (44), 3 states have return successors, (43), 14 states have call predecessors, (43), 14 states have call successors, (43) [2023-12-19 19:56:01,081 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 589 transitions. [2023-12-19 19:56:01,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-12-19 19:56:01,082 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:56:01,082 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:56:01,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-19 19:56:01,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-19 19:56:01,287 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:56:01,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:56:01,287 INFO L85 PathProgramCache]: Analyzing trace with hash -412950698, now seen corresponding path program 4 times [2023-12-19 19:56:01,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:56:01,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704928294] [2023-12-19 19:56:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:56:01,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:56:01,293 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:56:01,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869169234] [2023-12-19 19:56:01,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 19:56:01,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:56:01,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:56:01,297 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) [2023-12-19 19:56:01,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-19 19:56:01,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 19:56:01,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:56:01,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 66 conjunts are in the unsatisfiable core [2023-12-19 19:56:01,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:56:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 39 proven. 80 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2023-12-19 19:56:02,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:56:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 42 proven. 53 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2023-12-19 19:56:03,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:56:03,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704928294] [2023-12-19 19:56:03,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:56:03,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869169234] [2023-12-19 19:56:03,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869169234] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:56:03,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:56:03,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-12-19 19:56:03,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944729401] [2023-12-19 19:56:03,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:56:03,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-19 19:56:03,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:56:03,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-19 19:56:03,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2023-12-19 19:56:03,264 INFO L87 Difference]: Start difference. First operand 406 states and 589 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 25 states have internal predecessors, (53), 15 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (48), 15 states have call predecessors, (48), 15 states have call successors, (48) [2023-12-19 19:56:16,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:56:16,588 INFO L93 Difference]: Finished difference Result 545 states and 795 transitions. [2023-12-19 19:56:16,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-19 19:56:16,588 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 25 states have internal predecessors, (53), 15 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (48), 15 states have call predecessors, (48), 15 states have call successors, (48) Word has length 144 [2023-12-19 19:56:16,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:56:16,590 INFO L225 Difference]: With dead ends: 545 [2023-12-19 19:56:16,590 INFO L226 Difference]: Without dead ends: 543 [2023-12-19 19:56:16,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=793, Invalid=2867, Unknown=0, NotChecked=0, Total=3660 [2023-12-19 19:56:16,591 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 127 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:56:16,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 751 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-12-19 19:56:16,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-12-19 19:56:16,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 486. [2023-12-19 19:56:16,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 245 states have (on average 1.1755102040816328) internal successors, (288), 247 states have internal predecessors, (288), 211 states have call successors, (211), 29 states have call predecessors, (211), 29 states have return successors, (210), 209 states have call predecessors, (210), 210 states have call successors, (210) [2023-12-19 19:56:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 709 transitions. [2023-12-19 19:56:16,941 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 709 transitions. Word has length 144 [2023-12-19 19:56:16,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:56:16,941 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 709 transitions. [2023-12-19 19:56:16,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 25 states have internal predecessors, (53), 15 states have call successors, (49), 3 states have call predecessors, (49), 2 states have return successors, (48), 15 states have call predecessors, (48), 15 states have call successors, (48) [2023-12-19 19:56:16,941 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 709 transitions. [2023-12-19 19:56:16,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-19 19:56:16,942 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:56:16,942 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:56:16,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-19 19:56:17,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-19 19:56:17,147 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:56:17,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:56:17,148 INFO L85 PathProgramCache]: Analyzing trace with hash 891540329, now seen corresponding path program 5 times [2023-12-19 19:56:17,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:56:17,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047717814] [2023-12-19 19:56:17,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:56:17,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:56:17,154 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:56:17,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945644145] [2023-12-19 19:56:17,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 19:56:17,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:56:17,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:56:17,155 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) [2023-12-19 19:56:17,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-19 19:56:17,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-19 19:56:17,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:56:17,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 70 conjunts are in the unsatisfiable core [2023-12-19 19:56:17,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:56:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 100 proven. 79 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2023-12-19 19:56:23,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:56:24,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:56:24,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047717814] [2023-12-19 19:56:24,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:56:24,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945644145] [2023-12-19 19:56:24,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945644145] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 19:56:24,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:56:24,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-19 19:56:24,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583852460] [2023-12-19 19:56:24,376 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 19:56:24,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-19 19:56:24,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:56:24,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-19 19:56:24,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2023-12-19 19:56:24,377 INFO L87 Difference]: Start difference. First operand 486 states and 709 transitions. Second operand has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 10 states have call predecessors, (25), 8 states have call successors, (25) [2023-12-19 19:56:31,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:56:31,079 INFO L93 Difference]: Finished difference Result 534 states and 773 transitions. [2023-12-19 19:56:31,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-19 19:56:31,080 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 10 states have call predecessors, (25), 8 states have call successors, (25) Word has length 149 [2023-12-19 19:56:31,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:56:31,082 INFO L225 Difference]: With dead ends: 534 [2023-12-19 19:56:31,082 INFO L226 Difference]: Without dead ends: 532 [2023-12-19 19:56:31,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2023-12-19 19:56:31,083 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 60 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-19 19:56:31,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 472 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-19 19:56:31,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2023-12-19 19:56:31,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 525. [2023-12-19 19:56:31,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 265 states have (on average 1.1735849056603773) internal successors, (311), 267 states have internal predecessors, (311), 227 states have call successors, (227), 32 states have call predecessors, (227), 32 states have return successors, (226), 225 states have call predecessors, (226), 226 states have call successors, (226) [2023-12-19 19:56:31,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 764 transitions. [2023-12-19 19:56:31,464 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 764 transitions. Word has length 149 [2023-12-19 19:56:31,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:56:31,464 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 764 transitions. [2023-12-19 19:56:31,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 10 states have call predecessors, (25), 8 states have call successors, (25) [2023-12-19 19:56:31,464 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 764 transitions. [2023-12-19 19:56:31,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-12-19 19:56:31,466 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:56:31,466 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:56:31,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-19 19:56:31,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-19 19:56:31,671 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:56:31,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:56:31,671 INFO L85 PathProgramCache]: Analyzing trace with hash -200935207, now seen corresponding path program 6 times [2023-12-19 19:56:31,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:56:31,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616239701] [2023-12-19 19:56:31,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:56:31,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:56:31,678 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:56:31,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196685197] [2023-12-19 19:56:31,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 19:56:31,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:56:31,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:56:31,679 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) [2023-12-19 19:56:31,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-19 19:56:31,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-19 19:56:31,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:56:31,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 69 conjunts are in the unsatisfiable core [2023-12-19 19:56:31,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:56:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 117 proven. 158 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-12-19 19:56:32,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:56:34,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:56:34,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616239701] [2023-12-19 19:56:34,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:56:34,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196685197] [2023-12-19 19:56:34,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196685197] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 19:56:34,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:56:34,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-19 19:56:34,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837567283] [2023-12-19 19:56:34,412 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 19:56:34,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-19 19:56:34,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:56:34,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-19 19:56:34,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2023-12-19 19:56:34,413 INFO L87 Difference]: Start difference. First operand 525 states and 764 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 9 states have call predecessors, (28), 11 states have call successors, (28) [2023-12-19 19:56:35,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:56:35,501 INFO L93 Difference]: Finished difference Result 576 states and 836 transitions. [2023-12-19 19:56:35,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-19 19:56:35,502 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 9 states have call predecessors, (28), 11 states have call successors, (28) Word has length 166 [2023-12-19 19:56:35,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:56:35,505 INFO L225 Difference]: With dead ends: 576 [2023-12-19 19:56:35,505 INFO L226 Difference]: Without dead ends: 574 [2023-12-19 19:56:35,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2023-12-19 19:56:35,506 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 36 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-19 19:56:35,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 680 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-19 19:56:35,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-12-19 19:56:35,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 570. [2023-12-19 19:56:35,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 287 states have (on average 1.1742160278745644) internal successors, (337), 289 states have internal predecessors, (337), 247 states have call successors, (247), 35 states have call predecessors, (247), 35 states have return successors, (246), 245 states have call predecessors, (246), 246 states have call successors, (246) [2023-12-19 19:56:35,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 830 transitions. [2023-12-19 19:56:35,930 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 830 transitions. Word has length 166 [2023-12-19 19:56:35,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:56:35,930 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 830 transitions. [2023-12-19 19:56:35,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 9 states have call predecessors, (28), 11 states have call successors, (28) [2023-12-19 19:56:35,930 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 830 transitions. [2023-12-19 19:56:35,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-12-19 19:56:35,932 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:56:35,932 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:56:35,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-19 19:56:36,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:56:36,137 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:56:36,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:56:36,137 INFO L85 PathProgramCache]: Analyzing trace with hash -2122073176, now seen corresponding path program 7 times [2023-12-19 19:56:36,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:56:36,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528428597] [2023-12-19 19:56:36,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:56:36,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:56:36,144 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:56:36,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071539802] [2023-12-19 19:56:36,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 19:56:36,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:56:36,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:56:36,158 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) [2023-12-19 19:56:36,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-19 19:56:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:56:36,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-19 19:56:36,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:56:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 316 proven. 71 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2023-12-19 19:56:36,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:56:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 76 proven. 77 refuted. 0 times theorem prover too weak. 1057 trivial. 0 not checked. [2023-12-19 19:56:36,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:56:36,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528428597] [2023-12-19 19:56:36,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:56:36,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071539802] [2023-12-19 19:56:36,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071539802] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:56:36,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:56:36,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2023-12-19 19:56:36,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476062309] [2023-12-19 19:56:36,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:56:36,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-19 19:56:36,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:56:36,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-19 19:56:36,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-12-19 19:56:36,646 INFO L87 Difference]: Start difference. First operand 570 states and 830 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 14 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (57), 14 states have call predecessors, (57), 14 states have call successors, (57) [2023-12-19 19:56:37,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:56:37,522 INFO L93 Difference]: Finished difference Result 784 states and 1161 transitions. [2023-12-19 19:56:37,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-19 19:56:37,523 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 14 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (57), 14 states have call predecessors, (57), 14 states have call successors, (57) Word has length 171 [2023-12-19 19:56:37,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:56:37,538 INFO L225 Difference]: With dead ends: 784 [2023-12-19 19:56:37,538 INFO L226 Difference]: Without dead ends: 579 [2023-12-19 19:56:37,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=296, Invalid=964, Unknown=0, NotChecked=0, Total=1260 [2023-12-19 19:56:37,540 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 63 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 19:56:37,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 616 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 19:56:37,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2023-12-19 19:56:37,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 492. [2023-12-19 19:56:37,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 248 states have (on average 1.1491935483870968) internal successors, (285), 250 states have internal predecessors, (285), 211 states have call successors, (211), 32 states have call predecessors, (211), 32 states have return successors, (210), 209 states have call predecessors, (210), 210 states have call successors, (210) [2023-12-19 19:56:37,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 706 transitions. [2023-12-19 19:56:37,939 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 706 transitions. Word has length 171 [2023-12-19 19:56:37,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:56:37,939 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 706 transitions. [2023-12-19 19:56:37,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 14 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (57), 14 states have call predecessors, (57), 14 states have call successors, (57) [2023-12-19 19:56:37,939 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 706 transitions. [2023-12-19 19:56:37,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-12-19 19:56:37,941 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:56:37,941 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:56:37,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-19 19:56:38,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:56:38,146 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:56:38,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:56:38,146 INFO L85 PathProgramCache]: Analyzing trace with hash -245184013, now seen corresponding path program 8 times [2023-12-19 19:56:38,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:56:38,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014295320] [2023-12-19 19:56:38,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:56:38,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:56:38,156 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:56:38,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943789539] [2023-12-19 19:56:38,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 19:56:38,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:56:38,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:56:38,158 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) [2023-12-19 19:56:38,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-19 19:56:38,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 19:56:38,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:56:38,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 103 conjunts are in the unsatisfiable core [2023-12-19 19:56:38,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:56:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 213 proven. 176 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2023-12-19 19:56:39,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:57:20,150 WARN L293 SmtUtils]: Spent 9.47s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 19:57:25,958 WARN L293 SmtUtils]: Spent 5.62s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 19:57:50,237 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 19:58:02,394 WARN L293 SmtUtils]: Spent 7.35s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 19:58:19,009 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 19:58:40,436 WARN L293 SmtUtils]: Spent 12.60s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 19:58:45,633 WARN L293 SmtUtils]: Spent 5.19s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 19:59:10,856 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 19:59:23,894 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 19:59:31,939 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 19:59:44,685 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 20:00:05,302 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 20:00:13,369 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 20:00:21,379 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 20:00:34,865 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 20:00:42,961 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 20:00:49,827 WARN L293 SmtUtils]: Spent 6.87s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 20:01:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 223 proven. 103 refuted. 0 times theorem prover too weak. 892 trivial. 0 not checked. [2023-12-19 20:01:03,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:01:03,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014295320] [2023-12-19 20:01:03,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:01:03,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943789539] [2023-12-19 20:01:03,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943789539] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:01:03,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:01:03,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2023-12-19 20:01:03,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160354278] [2023-12-19 20:01:03,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:01:03,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-19 20:01:03,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:01:03,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-19 20:01:03,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=993, Unknown=4, NotChecked=0, Total=1260 [2023-12-19 20:01:03,740 INFO L87 Difference]: Start difference. First operand 492 states and 706 transitions. Second operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 31 states have internal predecessors, (67), 18 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (56), 19 states have call predecessors, (56), 17 states have call successors, (56) [2023-12-19 20:01:04,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-19 20:01:07,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-19 20:01:11,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:01:16,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:01:20,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:01:25,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:01:29,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:01:33,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:01:38,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:01:49,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:01:53,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:01:57,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:02:04,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:02:16,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:02:18,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:02:24,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:02:47,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:02:52,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:02:56,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:03:27,925 WARN L293 SmtUtils]: Spent 25.85s on a formula simplification that was a NOOP. DAG size: 99 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 20:03:40,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:03:44,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:03:48,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:03:52,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:04:28,119 WARN L293 SmtUtils]: Spent 23.85s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 20:04:50,648 WARN L293 SmtUtils]: Spent 19.55s on a formula simplification that was a NOOP. DAG size: 98 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 20:04:55,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:04:55,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:04:55,230 INFO L93 Difference]: Finished difference Result 638 states and 915 transitions. [2023-12-19 20:04:55,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-19 20:04:55,230 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 31 states have internal predecessors, (67), 18 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (56), 19 states have call predecessors, (56), 17 states have call successors, (56) Word has length 174 [2023-12-19 20:04:55,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:04:55,232 INFO L225 Difference]: With dead ends: 638 [2023-12-19 20:04:55,232 INFO L226 Difference]: Without dead ends: 636 [2023-12-19 20:04:55,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 312 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 188.6s TimeCoverageRelationStatistics Valid=999, Invalid=3026, Unknown=7, NotChecked=0, Total=4032 [2023-12-19 20:04:55,234 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 154 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 232 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.5s IncrementalHoareTripleChecker+Time [2023-12-19 20:04:55,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 766 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1058 Invalid, 20 Unknown, 0 Unchecked, 96.5s Time] [2023-12-19 20:04:55,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2023-12-19 20:04:55,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 597. [2023-12-19 20:04:55,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 303 states have (on average 1.1386138613861385) internal successors, (345), 308 states have internal predecessors, (345), 255 states have call successors, (255), 38 states have call predecessors, (255), 38 states have return successors, (254), 250 states have call predecessors, (254), 254 states have call successors, (254) [2023-12-19 20:04:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 854 transitions. [2023-12-19 20:04:55,814 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 854 transitions. Word has length 174 [2023-12-19 20:04:55,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:04:55,814 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 854 transitions. [2023-12-19 20:04:55,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 31 states have internal predecessors, (67), 18 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (56), 19 states have call predecessors, (56), 17 states have call successors, (56) [2023-12-19 20:04:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 854 transitions. [2023-12-19 20:04:55,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-12-19 20:04:55,815 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:04:55,816 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:04:55,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-19 20:04:56,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:04:56,018 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:04:56,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:04:56,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1019680267, now seen corresponding path program 3 times [2023-12-19 20:04:56,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:04:56,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22448759] [2023-12-19 20:04:56,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:04:56,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:04:56,025 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:04:56,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083701478] [2023-12-19 20:04:56,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 20:04:56,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:04:56,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:04:56,044 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) [2023-12-19 20:04:56,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-19 20:04:56,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-19 20:04:56,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 20:04:56,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 68 conjunts are in the unsatisfiable core [2023-12-19 20:04:56,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:04:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 122 proven. 98 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2023-12-19 20:04:57,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:05:03,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:05:03,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22448759] [2023-12-19 20:05:03,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:05:03,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083701478] [2023-12-19 20:05:03,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083701478] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 20:05:03,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 20:05:03,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-12-19 20:05:03,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174030514] [2023-12-19 20:05:03,513 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 20:05:03,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-19 20:05:03,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:05:03,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-19 20:05:03,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=598, Unknown=1, NotChecked=0, Total=702 [2023-12-19 20:05:03,514 INFO L87 Difference]: Start difference. First operand 597 states and 854 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2023-12-19 20:05:05,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:05:05,328 INFO L93 Difference]: Finished difference Result 648 states and 914 transitions. [2023-12-19 20:05:05,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-19 20:05:05,333 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) Word has length 177 [2023-12-19 20:05:05,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:05:05,338 INFO L225 Difference]: With dead ends: 648 [2023-12-19 20:05:05,338 INFO L226 Difference]: Without dead ends: 632 [2023-12-19 20:05:05,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=188, Invalid=1071, Unknown=1, NotChecked=0, Total=1260 [2023-12-19 20:05:05,338 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 40 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-19 20:05:05,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 474 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-19 20:05:05,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2023-12-19 20:05:05,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 629. [2023-12-19 20:05:05,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 322 states have (on average 1.1335403726708075) internal successors, (365), 327 states have internal predecessors, (365), 263 states have call successors, (263), 43 states have call predecessors, (263), 43 states have return successors, (262), 258 states have call predecessors, (262), 262 states have call successors, (262) [2023-12-19 20:05:05,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 890 transitions. [2023-12-19 20:05:05,943 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 890 transitions. Word has length 177 [2023-12-19 20:05:05,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:05:05,944 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 890 transitions. [2023-12-19 20:05:05,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 6 states have call predecessors, (22), 8 states have call successors, (22) [2023-12-19 20:05:05,944 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 890 transitions. [2023-12-19 20:05:05,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-12-19 20:05:05,945 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:05:05,945 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:05:05,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-19 20:05:06,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:05:06,156 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:05:06,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:05:06,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1586124913, now seen corresponding path program 9 times [2023-12-19 20:05:06,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:05:06,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542932725] [2023-12-19 20:05:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:05:06,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:05:06,165 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:05:06,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694514173] [2023-12-19 20:05:06,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 20:05:06,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:05:06,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:05:06,167 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) [2023-12-19 20:05:06,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-19 20:05:22,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-19 20:05:22,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 20:05:22,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-19 20:05:22,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:05:29,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 152 proven. 197 refuted. 0 times theorem prover too weak. 1192 trivial. 0 not checked. [2023-12-19 20:05:29,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:05:33,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:05:33,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542932725] [2023-12-19 20:05:33,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:05:33,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694514173] [2023-12-19 20:05:33,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694514173] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 20:05:33,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 20:05:33,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-12-19 20:05:33,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271816961] [2023-12-19 20:05:33,107 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 20:05:33,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-19 20:05:33,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:05:33,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-19 20:05:33,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2023-12-19 20:05:33,108 INFO L87 Difference]: Start difference. First operand 629 states and 890 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 12 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2023-12-19 20:05:56,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 20:06:21,633 WARN L293 SmtUtils]: Spent 6.35s on a formula simplification. DAG size of input: 62 DAG size of output: 51 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 20:06:30,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 20:06:41,652 WARN L293 SmtUtils]: Spent 6.47s on a formula simplification. DAG size of input: 70 DAG size of output: 51 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 20:06:53,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 20:07:00,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 20:07:00,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:07:00,318 INFO L93 Difference]: Finished difference Result 731 states and 1040 transitions. [2023-12-19 20:07:00,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-19 20:07:00,318 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 12 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) Word has length 191 [2023-12-19 20:07:00,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:07:00,321 INFO L225 Difference]: With dead ends: 731 [2023-12-19 20:07:00,321 INFO L226 Difference]: Without dead ends: 729 [2023-12-19 20:07:00,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 68.0s TimeCoverageRelationStatistics Valid=541, Invalid=2651, Unknown=0, NotChecked=0, Total=3192 [2023-12-19 20:07:00,322 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 89 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.1s IncrementalHoareTripleChecker+Time [2023-12-19 20:07:00,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 838 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 27.1s Time] [2023-12-19 20:07:00,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2023-12-19 20:07:01,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 718. [2023-12-19 20:07:01,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 364 states have (on average 1.1373626373626373) internal successors, (414), 370 states have internal predecessors, (414), 307 states have call successors, (307), 46 states have call predecessors, (307), 46 states have return successors, (306), 301 states have call predecessors, (306), 306 states have call successors, (306) [2023-12-19 20:07:01,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1027 transitions. [2023-12-19 20:07:01,054 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1027 transitions. Word has length 191 [2023-12-19 20:07:01,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:07:01,055 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 1027 transitions. [2023-12-19 20:07:01,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 12 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 12 states have call successors, (32) [2023-12-19 20:07:01,055 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1027 transitions. [2023-12-19 20:07:01,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-12-19 20:07:01,056 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:07:01,057 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:07:01,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-19 20:07:01,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:07:01,263 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:07:01,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:07:01,263 INFO L85 PathProgramCache]: Analyzing trace with hash 438581869, now seen corresponding path program 10 times [2023-12-19 20:07:01,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:07:01,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111245073] [2023-12-19 20:07:01,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:07:01,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:07:01,270 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:07:01,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945423811] [2023-12-19 20:07:01,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 20:07:01,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:07:01,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:07:01,272 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) [2023-12-19 20:07:01,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-19 20:07:01,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 20:07:01,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 20:07:01,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-19 20:07:01,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:07:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 289 proven. 95 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2023-12-19 20:07:01,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:07:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 99 proven. 97 refuted. 0 times theorem prover too weak. 1345 trivial. 0 not checked. [2023-12-19 20:07:01,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:07:01,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111245073] [2023-12-19 20:07:01,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:07:01,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945423811] [2023-12-19 20:07:01,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945423811] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:07:01,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:07:01,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-12-19 20:07:01,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995694808] [2023-12-19 20:07:01,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:07:01,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-19 20:07:01,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:07:01,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-19 20:07:01,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2023-12-19 20:07:01,756 INFO L87 Difference]: Start difference. First operand 718 states and 1027 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 23 states have internal predecessors, (64), 16 states have call successors, (63), 2 states have call predecessors, (63), 3 states have return successors, (63), 16 states have call predecessors, (63), 16 states have call successors, (63) [2023-12-19 20:07:03,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:07:03,200 INFO L93 Difference]: Finished difference Result 898 states and 1280 transitions. [2023-12-19 20:07:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-19 20:07:03,201 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 23 states have internal predecessors, (64), 16 states have call successors, (63), 2 states have call predecessors, (63), 3 states have return successors, (63), 16 states have call predecessors, (63), 16 states have call successors, (63) Word has length 191 [2023-12-19 20:07:03,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:07:03,203 INFO L225 Difference]: With dead ends: 898 [2023-12-19 20:07:03,203 INFO L226 Difference]: Without dead ends: 693 [2023-12-19 20:07:03,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=508, Invalid=1748, Unknown=0, NotChecked=0, Total=2256 [2023-12-19 20:07:03,204 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 72 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 20:07:03,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 994 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 20:07:03,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-12-19 20:07:03,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 607. [2023-12-19 20:07:03,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 314 states have (on average 1.1178343949044587) internal successors, (351), 319 states have internal predecessors, (351), 247 states have call successors, (247), 45 states have call predecessors, (247), 45 states have return successors, (246), 242 states have call predecessors, (246), 246 states have call successors, (246) [2023-12-19 20:07:03,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 844 transitions. [2023-12-19 20:07:03,791 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 844 transitions. Word has length 191 [2023-12-19 20:07:03,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:07:03,791 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 844 transitions. [2023-12-19 20:07:03,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 23 states have internal predecessors, (64), 16 states have call successors, (63), 2 states have call predecessors, (63), 3 states have return successors, (63), 16 states have call predecessors, (63), 16 states have call successors, (63) [2023-12-19 20:07:03,791 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 844 transitions. [2023-12-19 20:07:03,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-12-19 20:07:03,793 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:07:03,793 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:07:03,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-19 20:07:03,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:07:03,998 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:07:03,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:07:03,998 INFO L85 PathProgramCache]: Analyzing trace with hash 984787435, now seen corresponding path program 11 times [2023-12-19 20:07:03,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:07:03,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878779244] [2023-12-19 20:07:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:07:03,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:07:04,013 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:07:04,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512461253] [2023-12-19 20:07:04,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 20:07:04,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:07:04,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:07:04,014 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) [2023-12-19 20:07:04,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-19 20:07:04,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-19 20:07:04,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 20:07:04,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-19 20:07:04,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:07:04,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 366 proven. 112 refuted. 0 times theorem prover too weak. 1167 trivial. 0 not checked. [2023-12-19 20:07:04,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:07:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 93 proven. 103 refuted. 0 times theorem prover too weak. 1449 trivial. 0 not checked. [2023-12-19 20:07:04,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:07:04,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878779244] [2023-12-19 20:07:04,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:07:04,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512461253] [2023-12-19 20:07:04,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512461253] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:07:04,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:07:04,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2023-12-19 20:07:04,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272181525] [2023-12-19 20:07:04,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:07:04,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-19 20:07:04,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:07:04,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-19 20:07:04,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-12-19 20:07:04,510 INFO L87 Difference]: Start difference. First operand 607 states and 844 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 18 states have call successors, (66), 2 states have call predecessors, (66), 3 states have return successors, (66), 17 states have call predecessors, (66), 18 states have call successors, (66) [2023-12-19 20:07:05,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:07:05,981 INFO L93 Difference]: Finished difference Result 765 states and 1060 transitions. [2023-12-19 20:07:05,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-19 20:07:05,986 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 18 states have call successors, (66), 2 states have call predecessors, (66), 3 states have return successors, (66), 17 states have call predecessors, (66), 18 states have call successors, (66) Word has length 193 [2023-12-19 20:07:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:07:06,006 INFO L225 Difference]: With dead ends: 765 [2023-12-19 20:07:06,006 INFO L226 Difference]: Without dead ends: 510 [2023-12-19 20:07:06,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=584, Invalid=2172, Unknown=0, NotChecked=0, Total=2756 [2023-12-19 20:07:06,008 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 109 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 20:07:06,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 914 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 20:07:06,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2023-12-19 20:07:06,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 506. [2023-12-19 20:07:06,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 268 states have (on average 1.0932835820895523) internal successors, (293), 272 states have internal predecessors, (293), 195 states have call successors, (195), 42 states have call predecessors, (195), 42 states have return successors, (194), 191 states have call predecessors, (194), 194 states have call successors, (194) [2023-12-19 20:07:06,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 682 transitions. [2023-12-19 20:07:06,563 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 682 transitions. Word has length 193 [2023-12-19 20:07:06,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:07:06,564 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 682 transitions. [2023-12-19 20:07:06,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 18 states have call successors, (66), 2 states have call predecessors, (66), 3 states have return successors, (66), 17 states have call predecessors, (66), 18 states have call successors, (66) [2023-12-19 20:07:06,564 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 682 transitions. [2023-12-19 20:07:06,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-12-19 20:07:06,565 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:07:06,565 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:07:06,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-19 20:07:06,771 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,SelfDestructingSolverStorable24 [2023-12-19 20:07:06,771 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:07:06,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:07:06,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1355225366, now seen corresponding path program 4 times [2023-12-19 20:07:06,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:07:06,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995553907] [2023-12-19 20:07:06,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:07:06,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:07:06,778 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:07:06,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359709238] [2023-12-19 20:07:06,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 20:07:06,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:07:06,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:07:06,779 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) [2023-12-19 20:07:06,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-19 20:07:06,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 20:07:06,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 20:07:06,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-19 20:07:06,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:07:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 61 proven. 143 refuted. 0 times theorem prover too weak. 1557 trivial. 0 not checked. [2023-12-19 20:07:07,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:07:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 73 proven. 131 refuted. 0 times theorem prover too weak. 1557 trivial. 0 not checked. [2023-12-19 20:07:07,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:07:07,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995553907] [2023-12-19 20:07:07,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:07:07,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359709238] [2023-12-19 20:07:07,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359709238] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:07:07,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:07:07,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-12-19 20:07:07,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548921067] [2023-12-19 20:07:07,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:07:07,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-19 20:07:07,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:07:07,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-19 20:07:07,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2023-12-19 20:07:07,296 INFO L87 Difference]: Start difference. First operand 506 states and 682 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 20 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (68), 18 states have call predecessors, (68), 19 states have call successors, (68) [2023-12-19 20:07:08,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:07:08,410 INFO L93 Difference]: Finished difference Result 516 states and 691 transitions. [2023-12-19 20:07:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-19 20:07:08,411 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 20 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (68), 18 states have call predecessors, (68), 19 states have call successors, (68) Word has length 199 [2023-12-19 20:07:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:07:08,413 INFO L225 Difference]: With dead ends: 516 [2023-12-19 20:07:08,413 INFO L226 Difference]: Without dead ends: 461 [2023-12-19 20:07:08,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=282, Invalid=1440, Unknown=0, NotChecked=0, Total=1722 [2023-12-19 20:07:08,414 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 68 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 20:07:08,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 770 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 20:07:08,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2023-12-19 20:07:08,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 461. [2023-12-19 20:07:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 246 states have (on average 1.0934959349593496) internal successors, (269), 250 states have internal predecessors, (269), 175 states have call successors, (175), 39 states have call predecessors, (175), 39 states have return successors, (174), 171 states have call predecessors, (174), 174 states have call successors, (174) [2023-12-19 20:07:08,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 618 transitions. [2023-12-19 20:07:08,839 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 618 transitions. Word has length 199 [2023-12-19 20:07:08,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:07:08,839 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 618 transitions. [2023-12-19 20:07:08,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 20 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (68), 18 states have call predecessors, (68), 19 states have call successors, (68) [2023-12-19 20:07:08,840 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 618 transitions. [2023-12-19 20:07:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-12-19 20:07:08,841 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:07:08,841 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:07:08,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-19 20:07:09,046 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,SelfDestructingSolverStorable25 [2023-12-19 20:07:09,046 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:07:09,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:07:09,046 INFO L85 PathProgramCache]: Analyzing trace with hash -324776803, now seen corresponding path program 5 times [2023-12-19 20:07:09,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:07:09,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576703888] [2023-12-19 20:07:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:07:09,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:07:09,053 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:07:09,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844863998] [2023-12-19 20:07:09,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 20:07:09,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:07:09,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:07:09,054 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) [2023-12-19 20:07:09,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-19 20:07:09,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-12-19 20:07:09,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 20:07:09,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 85 conjunts are in the unsatisfiable core [2023-12-19 20:07:09,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:07:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 100 proven. 193 refuted. 0 times theorem prover too weak. 1476 trivial. 0 not checked. [2023-12-19 20:07:12,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:07:13,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:07:13,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576703888] [2023-12-19 20:07:13,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:07:13,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844863998] [2023-12-19 20:07:13,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844863998] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 20:07:13,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 20:07:13,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-12-19 20:07:13,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096073400] [2023-12-19 20:07:13,997 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 20:07:13,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-19 20:07:13,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:07:13,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-19 20:07:13,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2023-12-19 20:07:13,998 INFO L87 Difference]: Start difference. First operand 461 states and 618 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 21 states have internal predecessors, (43), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2023-12-19 20:07:15,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:07:15,664 INFO L93 Difference]: Finished difference Result 486 states and 645 transitions. [2023-12-19 20:07:15,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-19 20:07:15,665 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 21 states have internal predecessors, (43), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) Word has length 202 [2023-12-19 20:07:15,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:07:15,666 INFO L225 Difference]: With dead ends: 486 [2023-12-19 20:07:15,666 INFO L226 Difference]: Without dead ends: 476 [2023-12-19 20:07:15,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=263, Invalid=2089, Unknown=0, NotChecked=0, Total=2352 [2023-12-19 20:07:15,667 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 54 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-19 20:07:15,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 756 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-19 20:07:15,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-12-19 20:07:16,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 475. [2023-12-19 20:07:16,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 254 states have (on average 1.0905511811023623) internal successors, (277), 258 states have internal predecessors, (277), 179 states have call successors, (179), 41 states have call predecessors, (179), 41 states have return successors, (178), 175 states have call predecessors, (178), 178 states have call successors, (178) [2023-12-19 20:07:16,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 634 transitions. [2023-12-19 20:07:16,102 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 634 transitions. Word has length 202 [2023-12-19 20:07:16,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:07:16,102 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 634 transitions. [2023-12-19 20:07:16,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 21 states have internal predecessors, (43), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2023-12-19 20:07:16,103 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 634 transitions. [2023-12-19 20:07:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2023-12-19 20:07:16,104 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:07:16,104 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:07:16,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-19 20:07:16,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-19 20:07:16,310 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:07:16,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:07:16,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1011763440, now seen corresponding path program 12 times [2023-12-19 20:07:16,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:07:16,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077907653] [2023-12-19 20:07:16,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:07:16,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:07:16,319 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:07:16,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39220265] [2023-12-19 20:07:16,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 20:07:16,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:07:16,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:07:16,320 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) [2023-12-19 20:07:16,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-19 20:07:16,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-12-19 20:07:16,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 20:07:16,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-19 20:07:16,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:07:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 308 proven. 150 refuted. 0 times theorem prover too weak. 1571 trivial. 0 not checked. [2023-12-19 20:07:16,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:07:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 107 proven. 137 refuted. 0 times theorem prover too weak. 1785 trivial. 0 not checked. [2023-12-19 20:07:17,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:07:17,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077907653] [2023-12-19 20:07:17,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:07:17,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39220265] [2023-12-19 20:07:17,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39220265] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:07:17,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:07:17,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2023-12-19 20:07:17,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963937480] [2023-12-19 20:07:17,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:07:17,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-19 20:07:17,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:07:17,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-19 20:07:17,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2023-12-19 20:07:17,009 INFO L87 Difference]: Start difference. First operand 475 states and 634 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 19 states have call successors, (68), 2 states have call predecessors, (68), 3 states have return successors, (68), 18 states have call predecessors, (68), 19 states have call successors, (68) [2023-12-19 20:07:18,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:07:18,204 INFO L93 Difference]: Finished difference Result 570 states and 759 transitions. [2023-12-19 20:07:18,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-19 20:07:18,205 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 19 states have call successors, (68), 2 states have call predecessors, (68), 3 states have return successors, (68), 18 states have call predecessors, (68), 19 states have call successors, (68) Word has length 213 [2023-12-19 20:07:18,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:07:18,207 INFO L225 Difference]: With dead ends: 570 [2023-12-19 20:07:18,207 INFO L226 Difference]: Without dead ends: 471 [2023-12-19 20:07:18,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=527, Invalid=2023, Unknown=0, NotChecked=0, Total=2550 [2023-12-19 20:07:18,208 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 128 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 20:07:18,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 811 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 20:07:18,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-12-19 20:07:18,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 467. [2023-12-19 20:07:18,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 250 states have (on average 1.084) internal successors, (271), 253 states have internal predecessors, (271), 175 states have call successors, (175), 41 states have call predecessors, (175), 41 states have return successors, (174), 172 states have call predecessors, (174), 174 states have call successors, (174) [2023-12-19 20:07:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 620 transitions. [2023-12-19 20:07:18,634 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 620 transitions. Word has length 213 [2023-12-19 20:07:18,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:07:18,634 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 620 transitions. [2023-12-19 20:07:18,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 19 states have call successors, (68), 2 states have call predecessors, (68), 3 states have return successors, (68), 18 states have call predecessors, (68), 19 states have call successors, (68) [2023-12-19 20:07:18,635 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 620 transitions. [2023-12-19 20:07:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-12-19 20:07:18,636 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:07:18,636 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:07:18,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-19 20:07:18,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-19 20:07:18,842 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:07:18,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:07:18,842 INFO L85 PathProgramCache]: Analyzing trace with hash 613661843, now seen corresponding path program 13 times [2023-12-19 20:07:18,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:07:18,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912821213] [2023-12-19 20:07:18,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:07:18,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:07:18,848 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:07:18,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820988338] [2023-12-19 20:07:18,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 20:07:18,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:07:18,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:07:18,852 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) [2023-12-19 20:07:18,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-19 20:07:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:07:18,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-19 20:07:18,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:07:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2158 backedges. 438 proven. 145 refuted. 0 times theorem prover too weak. 1575 trivial. 0 not checked. [2023-12-19 20:07:19,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:07:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2158 backedges. 111 proven. 142 refuted. 0 times theorem prover too weak. 1905 trivial. 0 not checked. [2023-12-19 20:07:19,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:07:19,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912821213] [2023-12-19 20:07:19,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:07:19,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820988338] [2023-12-19 20:07:19,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820988338] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:07:19,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:07:19,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2023-12-19 20:07:19,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945127950] [2023-12-19 20:07:19,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:07:19,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-19 20:07:19,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:07:19,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-19 20:07:19,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2023-12-19 20:07:19,342 INFO L87 Difference]: Start difference. First operand 467 states and 620 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 25 states have internal predecessors, (68), 18 states have call successors, (73), 2 states have call predecessors, (73), 3 states have return successors, (73), 18 states have call predecessors, (73), 18 states have call successors, (73) [2023-12-19 20:07:20,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:07:20,592 INFO L93 Difference]: Finished difference Result 504 states and 651 transitions. [2023-12-19 20:07:20,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-19 20:07:20,593 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 25 states have internal predecessors, (68), 18 states have call successors, (73), 2 states have call predecessors, (73), 3 states have return successors, (73), 18 states have call predecessors, (73), 18 states have call successors, (73) Word has length 218 [2023-12-19 20:07:20,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:07:20,594 INFO L225 Difference]: With dead ends: 504 [2023-12-19 20:07:20,594 INFO L226 Difference]: Without dead ends: 353 [2023-12-19 20:07:20,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=693, Invalid=2169, Unknown=0, NotChecked=0, Total=2862 [2023-12-19 20:07:20,596 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 80 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 20:07:20,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 1146 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 20:07:20,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-12-19 20:07:20,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 317. [2023-12-19 20:07:20,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 179 states have (on average 1.0446927374301676) internal successors, (187), 179 states have internal predecessors, (187), 103 states have call successors, (103), 35 states have call predecessors, (103), 34 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2023-12-19 20:07:20,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 392 transitions. [2023-12-19 20:07:20,846 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 392 transitions. Word has length 218 [2023-12-19 20:07:20,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:07:20,847 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 392 transitions. [2023-12-19 20:07:20,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 25 states have internal predecessors, (68), 18 states have call successors, (73), 2 states have call predecessors, (73), 3 states have return successors, (73), 18 states have call predecessors, (73), 18 states have call successors, (73) [2023-12-19 20:07:20,848 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 392 transitions. [2023-12-19 20:07:20,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-12-19 20:07:20,855 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:07:20,855 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:07:20,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-19 20:07:21,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-19 20:07:21,060 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:07:21,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:07:21,060 INFO L85 PathProgramCache]: Analyzing trace with hash -2135831332, now seen corresponding path program 6 times [2023-12-19 20:07:21,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:07:21,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958853748] [2023-12-19 20:07:21,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:07:21,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:07:21,075 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:07:21,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35946377] [2023-12-19 20:07:21,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 20:07:21,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:07:21,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:07:21,078 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) [2023-12-19 20:07:21,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-19 20:07:22,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-12-19 20:07:22,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 20:07:22,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 76 conjunts are in the unsatisfiable core [2023-12-19 20:07:22,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:07:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2291 backedges. 325 proven. 185 refuted. 0 times theorem prover too weak. 1781 trivial. 0 not checked. [2023-12-19 20:07:41,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:07:59,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:07:59,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958853748] [2023-12-19 20:07:59,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:07:59,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35946377] [2023-12-19 20:07:59,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35946377] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 20:07:59,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 20:07:59,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-12-19 20:07:59,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050342987] [2023-12-19 20:07:59,045 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 20:07:59,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-19 20:07:59,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:07:59,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-19 20:07:59,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1009, Unknown=2, NotChecked=0, Total=1190 [2023-12-19 20:07:59,046 INFO L87 Difference]: Start difference. First operand 317 states and 392 transitions. Second operand has 23 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 12 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) [2023-12-19 20:08:09,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-19 20:08:43,479 WARN L293 SmtUtils]: Spent 8.52s on a formula simplification. DAG size of input: 45 DAG size of output: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 20:08:43,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:08:43,624 INFO L93 Difference]: Finished difference Result 404 states and 504 transitions. [2023-12-19 20:08:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-19 20:08:43,624 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 12 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) Word has length 224 [2023-12-19 20:08:43,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:08:43,626 INFO L225 Difference]: With dead ends: 404 [2023-12-19 20:08:43,626 INFO L226 Difference]: Without dead ends: 396 [2023-12-19 20:08:43,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 62.0s TimeCoverageRelationStatistics Valid=270, Invalid=1531, Unknown=5, NotChecked=0, Total=1806 [2023-12-19 20:08:43,626 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 24 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2023-12-19 20:08:43,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 386 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 750 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2023-12-19 20:08:43,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-12-19 20:08:43,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 395. [2023-12-19 20:08:43,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 220 states have (on average 1.05) internal successors, (231), 220 states have internal predecessors, (231), 131 states have call successors, (131), 44 states have call predecessors, (131), 43 states have return successors, (130), 130 states have call predecessors, (130), 130 states have call successors, (130) [2023-12-19 20:08:43,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 492 transitions. [2023-12-19 20:08:43,936 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 492 transitions. Word has length 224 [2023-12-19 20:08:43,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:08:43,936 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 492 transitions. [2023-12-19 20:08:43,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 12 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) [2023-12-19 20:08:43,936 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 492 transitions. [2023-12-19 20:08:43,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-12-19 20:08:43,937 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:08:43,938 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:08:43,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-19 20:08:44,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:08:44,143 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:08:44,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:08:44,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1965657534, now seen corresponding path program 7 times [2023-12-19 20:08:44,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:08:44,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487494795] [2023-12-19 20:08:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:08:44,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:08:44,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:08:44,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786801681] [2023-12-19 20:08:44,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 20:08:44,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:08:44,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:08:44,154 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) [2023-12-19 20:08:44,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-19 20:08:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:08:44,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-19 20:08:44,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:08:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2291 backedges. 81 proven. 181 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2023-12-19 20:08:44,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:08:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2291 backedges. 87 proven. 175 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2023-12-19 20:08:44,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:08:44,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487494795] [2023-12-19 20:08:44,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:08:44,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786801681] [2023-12-19 20:08:44,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786801681] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:08:44,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:08:44,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2023-12-19 20:08:44,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142003298] [2023-12-19 20:08:44,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:08:44,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-19 20:08:44,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:08:44,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-19 20:08:44,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2023-12-19 20:08:44,835 INFO L87 Difference]: Start difference. First operand 395 states and 492 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 25 states have internal predecessors, (69), 20 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (75), 19 states have call predecessors, (75), 19 states have call successors, (75) [2023-12-19 20:08:46,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:08:46,072 INFO L93 Difference]: Finished difference Result 421 states and 532 transitions. [2023-12-19 20:08:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-19 20:08:46,072 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 25 states have internal predecessors, (69), 20 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (75), 19 states have call predecessors, (75), 19 states have call successors, (75) Word has length 224 [2023-12-19 20:08:46,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:08:46,074 INFO L225 Difference]: With dead ends: 421 [2023-12-19 20:08:46,074 INFO L226 Difference]: Without dead ends: 326 [2023-12-19 20:08:46,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=1887, Unknown=0, NotChecked=0, Total=2352 [2023-12-19 20:08:46,077 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 71 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 20:08:46,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 982 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 20:08:46,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-12-19 20:08:46,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 317. [2023-12-19 20:08:46,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 180 states have (on average 1.0277777777777777) internal successors, (185), 182 states have internal predecessors, (185), 100 states have call successors, (100), 37 states have call predecessors, (100), 36 states have return successors, (99), 97 states have call predecessors, (99), 99 states have call successors, (99) [2023-12-19 20:08:46,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 384 transitions. [2023-12-19 20:08:46,329 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 384 transitions. Word has length 224 [2023-12-19 20:08:46,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:08:46,329 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 384 transitions. [2023-12-19 20:08:46,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 25 states have internal predecessors, (69), 20 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (75), 19 states have call predecessors, (75), 19 states have call successors, (75) [2023-12-19 20:08:46,330 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 384 transitions. [2023-12-19 20:08:46,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-12-19 20:08:46,331 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:08:46,331 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:08:46,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-19 20:08:46,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:08:46,552 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:08:46,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:08:46,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1042068636, now seen corresponding path program 8 times [2023-12-19 20:08:46,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:08:46,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021727797] [2023-12-19 20:08:46,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:08:46,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:08:46,559 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:08:46,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564119163] [2023-12-19 20:08:46,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 20:08:46,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:08:46,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:08:46,561 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) [2023-12-19 20:08:46,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-19 20:08:46,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 20:08:46,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 20:08:46,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-19 20:08:46,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:08:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2291 backedges. 604 proven. 98 refuted. 0 times theorem prover too weak. 1589 trivial. 0 not checked. [2023-12-19 20:08:46,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:08:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2291 backedges. 120 proven. 142 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2023-12-19 20:08:47,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:08:47,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021727797] [2023-12-19 20:08:47,196 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:08:47,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564119163] [2023-12-19 20:08:47,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564119163] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:08:47,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:08:47,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2023-12-19 20:08:47,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302616415] [2023-12-19 20:08:47,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:08:47,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-19 20:08:47,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:08:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-19 20:08:47,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2023-12-19 20:08:47,198 INFO L87 Difference]: Start difference. First operand 317 states and 384 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 20 states have call successors, (76), 2 states have call predecessors, (76), 3 states have return successors, (76), 19 states have call predecessors, (76), 20 states have call successors, (76) [2023-12-19 20:08:47,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:08:47,941 INFO L93 Difference]: Finished difference Result 347 states and 409 transitions. [2023-12-19 20:08:47,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-19 20:08:47,941 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 20 states have call successors, (76), 2 states have call predecessors, (76), 3 states have return successors, (76), 19 states have call predecessors, (76), 20 states have call successors, (76) Word has length 224 [2023-12-19 20:08:47,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:08:47,942 INFO L225 Difference]: With dead ends: 347 [2023-12-19 20:08:47,942 INFO L226 Difference]: Without dead ends: 223 [2023-12-19 20:08:47,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1656, Unknown=0, NotChecked=0, Total=1980 [2023-12-19 20:08:47,943 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 90 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 20:08:47,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 876 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 20:08:47,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-12-19 20:08:48,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2023-12-19 20:08:48,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 130 states have (on average 1.023076923076923) internal successors, (133), 131 states have internal predecessors, (133), 65 states have call successors, (65), 28 states have call predecessors, (65), 27 states have return successors, (64), 63 states have call predecessors, (64), 64 states have call successors, (64) [2023-12-19 20:08:48,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 262 transitions. [2023-12-19 20:08:48,089 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 262 transitions. Word has length 224 [2023-12-19 20:08:48,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:08:48,089 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 262 transitions. [2023-12-19 20:08:48,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 20 states have call successors, (76), 2 states have call predecessors, (76), 3 states have return successors, (76), 19 states have call predecessors, (76), 20 states have call successors, (76) [2023-12-19 20:08:48,089 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 262 transitions. [2023-12-19 20:08:48,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-12-19 20:08:48,090 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:08:48,091 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:08:48,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-19 20:08:48,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:08:48,295 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:08:48,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:08:48,296 INFO L85 PathProgramCache]: Analyzing trace with hash -338426917, now seen corresponding path program 9 times [2023-12-19 20:08:48,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:08:48,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130098852] [2023-12-19 20:08:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:08:48,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:08:48,303 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:08:48,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834941804] [2023-12-19 20:08:48,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 20:08:48,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:08:48,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:08:48,304 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) [2023-12-19 20:08:48,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-19 20:08:48,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-19 20:08:48,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 20:08:48,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 99 conjunts are in the unsatisfiable core [2023-12-19 20:08:48,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:08:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 391 proven. 276 refuted. 0 times theorem prover too weak. 2216 trivial. 0 not checked. [2023-12-19 20:08:50,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:08:56,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:08:56,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130098852] [2023-12-19 20:08:56,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:08:56,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834941804] [2023-12-19 20:08:56,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834941804] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 20:08:56,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 20:08:56,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-12-19 20:08:56,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983642282] [2023-12-19 20:08:56,461 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 20:08:56,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-19 20:08:56,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:08:56,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-19 20:08:56,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=877, Unknown=1, NotChecked=0, Total=1056 [2023-12-19 20:08:56,462 INFO L87 Difference]: Start difference. First operand 223 states and 262 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 8 states have call predecessors, (30), 11 states have call successors, (30) [2023-12-19 20:08:59,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:08:59,484 INFO L93 Difference]: Finished difference Result 291 states and 353 transitions. [2023-12-19 20:08:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-19 20:08:59,485 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 8 states have call predecessors, (30), 11 states have call successors, (30) Word has length 246 [2023-12-19 20:08:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:08:59,486 INFO L225 Difference]: With dead ends: 291 [2023-12-19 20:08:59,486 INFO L226 Difference]: Without dead ends: 247 [2023-12-19 20:08:59,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=250, Invalid=1309, Unknown=1, NotChecked=0, Total=1560 [2023-12-19 20:08:59,487 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 33 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-19 20:08:59,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 652 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-19 20:08:59,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-12-19 20:08:59,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 194. [2023-12-19 20:08:59,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 51 states have call successors, (51), 26 states have call predecessors, (51), 25 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-12-19 20:08:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 220 transitions. [2023-12-19 20:08:59,608 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 220 transitions. Word has length 246 [2023-12-19 20:08:59,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:08:59,609 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 220 transitions. [2023-12-19 20:08:59,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (30), 8 states have call predecessors, (30), 11 states have call successors, (30) [2023-12-19 20:08:59,609 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 220 transitions. [2023-12-19 20:08:59,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-12-19 20:08:59,610 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:08:59,610 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:08:59,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-19 20:08:59,815 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,SelfDestructingSolverStorable32 [2023-12-19 20:08:59,815 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:08:59,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:08:59,816 INFO L85 PathProgramCache]: Analyzing trace with hash 474172660, now seen corresponding path program 10 times [2023-12-19 20:08:59,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:08:59,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543935712] [2023-12-19 20:08:59,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:08:59,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:08:59,823 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:08:59,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282683956] [2023-12-19 20:08:59,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 20:08:59,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:08:59,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:08:59,829 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) [2023-12-19 20:08:59,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-19 20:08:59,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 20:08:59,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 20:08:59,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-19 20:08:59,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:09:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2894 backedges. 703 proven. 130 refuted. 0 times theorem prover too weak. 2061 trivial. 0 not checked. [2023-12-19 20:09:00,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:09:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2894 backedges. 140 proven. 189 refuted. 0 times theorem prover too weak. 2565 trivial. 0 not checked. [2023-12-19 20:09:00,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:09:00,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543935712] [2023-12-19 20:09:00,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:09:00,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282683956] [2023-12-19 20:09:00,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282683956] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:09:00,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:09:00,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2023-12-19 20:09:00,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937995966] [2023-12-19 20:09:00,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:09:00,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-19 20:09:00,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:09:00,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-19 20:09:00,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2023-12-19 20:09:00,481 INFO L87 Difference]: Start difference. First operand 194 states and 220 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 29 states have internal predecessors, (79), 20 states have call successors, (83), 2 states have call predecessors, (83), 3 states have return successors, (83), 20 states have call predecessors, (83), 20 states have call successors, (83) [2023-12-19 20:09:01,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:09:01,166 INFO L93 Difference]: Finished difference Result 243 states and 275 transitions. [2023-12-19 20:09:01,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-19 20:09:01,166 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 29 states have internal predecessors, (79), 20 states have call successors, (83), 2 states have call predecessors, (83), 3 states have return successors, (83), 20 states have call predecessors, (83), 20 states have call successors, (83) Word has length 249 [2023-12-19 20:09:01,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:09:01,167 INFO L225 Difference]: With dead ends: 243 [2023-12-19 20:09:01,167 INFO L226 Difference]: Without dead ends: 0 [2023-12-19 20:09:01,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2023-12-19 20:09:01,167 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 59 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 20:09:01,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1002 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 20:09:01,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-19 20:09:01,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-19 20:09:01,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2023-12-19 20:09:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-19 20:09:01,168 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 249 [2023-12-19 20:09:01,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:09:01,168 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-19 20:09:01,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 29 states have internal predecessors, (79), 20 states have call successors, (83), 2 states have call predecessors, (83), 3 states have return successors, (83), 20 states have call predecessors, (83), 20 states have call successors, (83) [2023-12-19 20:09:01,168 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-19 20:09:01,168 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-19 20:09:01,170 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 20:09:01,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-12-19 20:09:01,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:09:01,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-19 20:09:09,346 WARN L293 SmtUtils]: Spent 5.07s on a formula simplification. DAG size of input: 531 DAG size of output: 922 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) Received shutdown request... [2023-12-19 20:09:21,284 WARN L619 AbstractCegarLoop]: Verification canceled: while PolyPacSimplificationTermWalker was simplifying a ∨-8-21-4-15-6-21-4-15-4-15-6-21-6-21-4-15-4-4-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-37-14-6-15-6-21-6-15-6-21-6-15-4-4-2-1 context. [2023-12-19 20:09:21,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-19 20:09:21,286 INFO L257 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2023-12-19 20:09:21,287 INFO L158 Benchmark]: Toolchain (without parser) took 878388.11ms. Allocated memory was 230.7MB in the beginning and 584.1MB in the end (delta: 353.4MB). Free memory was 186.4MB in the beginning and 472.3MB in the end (delta: -285.9MB). Peak memory consumption was 68.5MB. Max. memory is 8.0GB. [2023-12-19 20:09:21,287 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 175.1MB. Free memory was 125.3MB in the beginning and 125.1MB in the end (delta: 164.4kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 20:09:21,287 INFO L158 Benchmark]: CACSL2BoogieTranslator took 167.40ms. Allocated memory is still 230.7MB. Free memory was 185.9MB in the beginning and 174.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-19 20:09:21,287 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.07ms. Allocated memory is still 230.7MB. Free memory was 174.4MB in the beginning and 172.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 20:09:21,288 INFO L158 Benchmark]: Boogie Preprocessor took 31.36ms. Allocated memory is still 230.7MB. Free memory was 172.8MB in the beginning and 171.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-19 20:09:21,288 INFO L158 Benchmark]: RCFGBuilder took 289.55ms. Allocated memory is still 230.7MB. Free memory was 171.2MB in the beginning and 158.1MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-19 20:09:21,288 INFO L158 Benchmark]: TraceAbstraction took 877873.78ms. Allocated memory was 230.7MB in the beginning and 584.1MB in the end (delta: 353.4MB). Free memory was 157.1MB in the beginning and 472.3MB in the end (delta: -315.3MB). Peak memory consumption was 39.2MB. Max. memory is 8.0GB. [2023-12-19 20:09:21,289 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 175.1MB. Free memory was 125.3MB in the beginning and 125.1MB in the end (delta: 164.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 167.40ms. Allocated memory is still 230.7MB. Free memory was 185.9MB in the beginning and 174.4MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.07ms. Allocated memory is still 230.7MB. Free memory was 174.4MB in the beginning and 172.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.36ms. Allocated memory is still 230.7MB. Free memory was 172.8MB in the beginning and 171.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 289.55ms. Allocated memory is still 230.7MB. Free memory was 171.2MB in the beginning and 158.1MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 877873.78ms. Allocated memory was 230.7MB in the beginning and 584.1MB in the end (delta: 353.4MB). Free memory was 157.1MB in the beginning and 472.3MB in the end (delta: -315.3MB). Peak memory consumption was 39.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while PolyPacSimplificationTermWalker was simplifying a ∧-43-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-42-3-1 context. RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown