/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 08:09:09,045 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 08:09:09,091 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 08:09:09,095 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 08:09:09,095 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 08:09:09,113 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 08:09:09,113 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 08:09:09,113 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 08:09:09,114 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 08:09:09,114 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 08:09:09,115 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 08:09:09,115 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 08:09:09,115 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 08:09:09,117 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 08:09:09,118 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 08:09:09,118 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 08:09:09,118 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 08:09:09,119 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 08:09:09,119 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 08:09:09,119 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 08:09:09,120 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 08:09:09,123 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 08:09:09,123 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 08:09:09,123 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 08:09:09,124 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 08:09:09,124 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 08:09:09,124 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 08:09:09,124 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 08:09:09,125 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 08:09:09,125 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 08:09:09,125 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 08:09:09,125 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 08:09:09,126 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 08:09:09,126 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 08:09:09,126 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 08:09:09,127 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 08:09:09,127 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 08:09:09,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 08:09:09,127 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 08:09:09,128 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 08:09:09,131 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 08:09:09,131 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 08:09:09,132 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 08:09:09,132 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 08:09:09,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 08:09:09,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 08:09:09,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 08:09:09,401 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 08:09:09,401 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 08:09:09,402 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound100.c [2023-12-21 08:09:10,564 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 08:09:10,747 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 08:09:10,747 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound100.c [2023-12-21 08:09:10,757 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3e4d8f51/d4b80c038e4a4243bf680846d8502fb4/FLAG309116c39 [2023-12-21 08:09:10,771 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3e4d8f51/d4b80c038e4a4243bf680846d8502fb4 [2023-12-21 08:09:10,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 08:09:10,775 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 08:09:10,778 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 08:09:10,778 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 08:09:10,781 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 08:09:10,782 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 08:09:10" (1/1) ... [2023-12-21 08:09:10,783 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c3e02c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:09:10, skipping insertion in model container [2023-12-21 08:09:10,783 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 08:09:10" (1/1) ... [2023-12-21 08:09:10,801 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 08:09:10,946 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/prodbin-ll_valuebound100.c[537,550] [2023-12-21 08:09:10,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 08:09:10,974 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 08:09:10,992 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/prodbin-ll_valuebound100.c[537,550] [2023-12-21 08:09:11,004 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 08:09:11,016 INFO L206 MainTranslator]: Completed translation [2023-12-21 08:09:11,018 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:09:11 WrapperNode [2023-12-21 08:09:11,018 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 08:09:11,020 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 08:09:11,020 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 08:09:11,020 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 08:09:11,025 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:09:11" (1/1) ... [2023-12-21 08:09:11,032 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:09:11" (1/1) ... [2023-12-21 08:09:11,048 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 43 [2023-12-21 08:09:11,049 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 08:09:11,049 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 08:09:11,049 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 08:09:11,049 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 08:09:11,058 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:09:11" (1/1) ... [2023-12-21 08:09:11,058 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:09:11" (1/1) ... [2023-12-21 08:09:11,065 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:09:11" (1/1) ... [2023-12-21 08:09:11,079 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]. [2023-12-21 08:09:11,080 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:09:11" (1/1) ... [2023-12-21 08:09:11,080 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:09:11" (1/1) ... [2023-12-21 08:09:11,087 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:09:11" (1/1) ... [2023-12-21 08:09:11,091 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:09:11" (1/1) ... [2023-12-21 08:09:11,096 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:09:11" (1/1) ... [2023-12-21 08:09:11,096 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:09:11" (1/1) ... [2023-12-21 08:09:11,099 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 08:09:11,100 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 08:09:11,100 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 08:09:11,101 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 08:09:11,101 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:09:11" (1/1) ... [2023-12-21 08:09:11,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 08:09:11,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:09:11,125 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) [2023-12-21 08:09:11,148 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 [2023-12-21 08:09:11,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 08:09:11,166 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-21 08:09:11,166 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-21 08:09:11,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 08:09:11,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 08:09:11,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 08:09:11,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-21 08:09:11,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-21 08:09:11,214 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 08:09:11,215 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 08:09:11,353 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 08:09:11,368 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 08:09:11,368 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-21 08:09:11,368 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 08:09:11 BoogieIcfgContainer [2023-12-21 08:09:11,369 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 08:09:11,370 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 08:09:11,370 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 08:09:11,372 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 08:09:11,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 08:09:10" (1/3) ... [2023-12-21 08:09:11,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc13e20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 08:09:11, skipping insertion in model container [2023-12-21 08:09:11,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:09:11" (2/3) ... [2023-12-21 08:09:11,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc13e20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 08:09:11, skipping insertion in model container [2023-12-21 08:09:11,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 08:09:11" (3/3) ... [2023-12-21 08:09:11,374 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound100.c [2023-12-21 08:09:11,386 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 08:09:11,386 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 08:09:11,421 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 08:09:11,426 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;@235de6fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 08:09:11,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 08:09:11,429 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 08:09:11,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-21 08:09:11,435 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:09:11,436 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 08:09:11,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:09:11,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:09:11,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1698673820, now seen corresponding path program 1 times [2023-12-21 08:09:11,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:09:11,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004494545] [2023-12-21 08:09:11,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:09:11,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:09:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:09:11,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:09:11,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004494545] [2023-12-21 08:09:11,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-21 08:09:11,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054781947] [2023-12-21 08:09:11,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:09:11,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:09:11,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:09:11,559 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) [2023-12-21 08:09:11,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 08:09:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:09:11,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-21 08:09:11,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:09:11,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 08:09:11,685 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 08:09:11,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054781947] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 08:09:11,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 08:09:11,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 08:09:11,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837613947] [2023-12-21 08:09:11,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 08:09:11,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 08:09:11,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:09:11,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 08:09:11,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 08:09:11,715 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-21 08:09:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:09:11,735 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2023-12-21 08:09:11,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 08:09:11,743 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-12-21 08:09:11,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:09:11,749 INFO L225 Difference]: With dead ends: 46 [2023-12-21 08:09:11,749 INFO L226 Difference]: Without dead ends: 22 [2023-12-21 08:09:11,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 08:09:11,756 INFO L413 NwaCegarLoop]: 26 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, 26 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 [2023-12-21 08:09:11,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 08:09:11,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-21 08:09:11,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-21 08:09:11,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 08:09:11,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-12-21 08:09:11,790 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 23 [2023-12-21 08:09:11,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:09:11,790 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-12-21 08:09:11,790 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-21 08:09:11,791 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-12-21 08:09:11,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-21 08:09:11,793 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:09:11,793 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 08:09:11,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-21 08:09:11,998 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 [2023-12-21 08:09:11,999 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:09:12,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:09:12,000 INFO L85 PathProgramCache]: Analyzing trace with hash 549966490, now seen corresponding path program 1 times [2023-12-21 08:09:12,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:09:12,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551849550] [2023-12-21 08:09:12,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:09:12,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:09:12,022 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:09:12,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934330844] [2023-12-21 08:09:12,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:09:12,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:09:12,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:09:12,024 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) [2023-12-21 08:09:12,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 08:09:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:09:12,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-21 08:09:12,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:09:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 08:09:12,229 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 08:09:12,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:09:12,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551849550] [2023-12-21 08:09:12,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:09:12,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934330844] [2023-12-21 08:09:12,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934330844] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 08:09:12,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 08:09:12,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-21 08:09:12,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864845795] [2023-12-21 08:09:12,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 08:09:12,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 08:09:12,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:09:12,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 08:09:12,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-21 08:09:12,234 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-21 08:09:12,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:09:12,349 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-12-21 08:09:12,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 08:09:12,349 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2023-12-21 08:09:12,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:09:12,351 INFO L225 Difference]: With dead ends: 38 [2023-12-21 08:09:12,351 INFO L226 Difference]: Without dead ends: 31 [2023-12-21 08:09:12,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-12-21 08:09:12,354 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 08:09:12,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 69 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 08:09:12,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-21 08:09:12,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-12-21 08:09:12,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 08:09:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-12-21 08:09:12,362 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2023-12-21 08:09:12,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:09:12,364 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-12-21 08:09:12,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-21 08:09:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-12-21 08:09:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-21 08:09:12,365 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:09:12,365 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 08:09:12,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 08:09:12,566 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 [2023-12-21 08:09:12,566 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:09:12,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:09:12,567 INFO L85 PathProgramCache]: Analyzing trace with hash 191228685, now seen corresponding path program 1 times [2023-12-21 08:09:12,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:09:12,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246902143] [2023-12-21 08:09:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:09:12,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:09:12,579 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:09:12,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846624979] [2023-12-21 08:09:12,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:09:12,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:09:12,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:09:12,581 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) [2023-12-21 08:09:12,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 08:09:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:09:12,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-21 08:09:12,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:09:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 08:09:12,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 08:09:17,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 08:09:17,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:09:17,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246902143] [2023-12-21 08:09:17,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:09:17,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846624979] [2023-12-21 08:09:17,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846624979] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 08:09:17,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 08:09:17,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-12-21 08:09:17,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905614567] [2023-12-21 08:09:17,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 08:09:17,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-21 08:09:17,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:09:17,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-21 08:09:17,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-12-21 08:09:17,234 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 14 states have internal predecessors, (27), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 08:09:20,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:09:20,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:09:20,628 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2023-12-21 08:09:20,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 08:09:20,629 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 14 states have internal predecessors, (27), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2023-12-21 08:09:20,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:09:20,631 INFO L225 Difference]: With dead ends: 47 [2023-12-21 08:09:20,631 INFO L226 Difference]: Without dead ends: 45 [2023-12-21 08:09:20,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-12-21 08:09:20,632 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-21 08:09:20,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 155 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-12-21 08:09:20,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-21 08:09:20,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2023-12-21 08:09:20,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.206896551724138) internal successors, (35), 31 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-21 08:09:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2023-12-21 08:09:20,644 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 32 [2023-12-21 08:09:20,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:09:20,644 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2023-12-21 08:09:20,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 14 states have internal predecessors, (27), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 08:09:20,644 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2023-12-21 08:09:20,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-21 08:09:20,645 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:09:20,645 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 08:09:20,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 08:09:20,856 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 [2023-12-21 08:09:20,857 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:09:20,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:09:20,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1966236047, now seen corresponding path program 1 times [2023-12-21 08:09:20,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:09:20,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863532830] [2023-12-21 08:09:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:09:20,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:09:20,879 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:09:20,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577472162] [2023-12-21 08:09:20,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:09:20,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:09:20,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:09:20,886 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) [2023-12-21 08:09:20,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 08:09:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:09:20,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-21 08:09:20,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:09:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 08:09:21,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 08:09:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 08:09:21,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:09:21,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863532830] [2023-12-21 08:09:21,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:09:21,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577472162] [2023-12-21 08:09:21,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577472162] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 08:09:21,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 08:09:21,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-12-21 08:09:21,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249025315] [2023-12-21 08:09:21,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 08:09:21,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 08:09:21,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:09:21,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 08:09:21,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-12-21 08:09:21,706 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-21 08:09:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:09:22,497 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2023-12-21 08:09:22,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 08:09:22,498 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 32 [2023-12-21 08:09:22,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:09:22,499 INFO L225 Difference]: With dead ends: 78 [2023-12-21 08:09:22,499 INFO L226 Difference]: Without dead ends: 71 [2023-12-21 08:09:22,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2023-12-21 08:09:22,501 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 08:09:22,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 134 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 08:09:22,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-21 08:09:22,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2023-12-21 08:09:22,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 52 states have internal predecessors, (60), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-21 08:09:22,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2023-12-21 08:09:22,515 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 32 [2023-12-21 08:09:22,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:09:22,515 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2023-12-21 08:09:22,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-21 08:09:22,515 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2023-12-21 08:09:22,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-21 08:09:22,516 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:09:22,516 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-21 08:09:22,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-21 08:09:22,725 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 [2023-12-21 08:09:22,726 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:09:22,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:09:22,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1307708752, now seen corresponding path program 1 times [2023-12-21 08:09:22,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:09:22,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462722378] [2023-12-21 08:09:22,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:09:22,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:09:22,738 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:09:22,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854391152] [2023-12-21 08:09:22,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:09:22,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:09:22,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:09:22,739 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) [2023-12-21 08:09:22,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 08:09:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:09:22,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-21 08:09:22,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:09:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 08:09:22,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 08:09:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 08:09:22,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:09:22,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462722378] [2023-12-21 08:09:22,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:09:22,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854391152] [2023-12-21 08:09:22,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854391152] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 08:09:22,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 08:09:22,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-12-21 08:09:22,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965809178] [2023-12-21 08:09:22,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 08:09:22,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 08:09:22,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:09:22,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 08:09:22,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-21 08:09:22,902 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-21 08:09:23,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:09:23,063 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2023-12-21 08:09:23,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 08:09:23,064 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2023-12-21 08:09:23,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:09:23,065 INFO L225 Difference]: With dead ends: 75 [2023-12-21 08:09:23,065 INFO L226 Difference]: Without dead ends: 68 [2023-12-21 08:09:23,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-12-21 08:09:23,066 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 08:09:23,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 124 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 08:09:23,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-21 08:09:23,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2023-12-21 08:09:23,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 51 states have internal predecessors, (56), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-21 08:09:23,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2023-12-21 08:09:23,076 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 38 [2023-12-21 08:09:23,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:09:23,077 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2023-12-21 08:09:23,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-21 08:09:23,077 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2023-12-21 08:09:23,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-21 08:09:23,078 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:09:23,078 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 08:09:23,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 08:09:23,280 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 [2023-12-21 08:09:23,280 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:09:23,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:09:23,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1472142383, now seen corresponding path program 1 times [2023-12-21 08:09:23,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:09:23,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754033938] [2023-12-21 08:09:23,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:09:23,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:09:23,291 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:09:23,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824452186] [2023-12-21 08:09:23,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:09:23,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:09:23,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:09:23,292 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) [2023-12-21 08:09:23,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 08:09:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:09:23,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-21 08:09:23,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:09:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 08:09:28,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 08:09:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-21 08:09:40,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:09:40,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754033938] [2023-12-21 08:09:40,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:09:40,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824452186] [2023-12-21 08:09:40,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824452186] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 08:09:40,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 08:09:40,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2023-12-21 08:09:40,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299832141] [2023-12-21 08:09:40,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 08:09:40,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 08:09:40,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:09:40,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 08:09:40,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-12-21 08:09:40,609 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 7 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-21 08:09:44,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.98s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:09:46,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:10:11,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.63s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:10:16,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:10:16,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:10:16,664 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2023-12-21 08:10:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 08:10:16,665 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 7 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 50 [2023-12-21 08:10:16,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:10:16,666 INFO L225 Difference]: With dead ends: 101 [2023-12-21 08:10:16,666 INFO L226 Difference]: Without dead ends: 99 [2023-12-21 08:10:16,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=173, Invalid=696, Unknown=1, NotChecked=0, Total=870 [2023-12-21 08:10:16,667 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 29 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2023-12-21 08:10:16,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 192 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2023-12-21 08:10:16,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-21 08:10:16,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-12-21 08:10:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 74 states have (on average 1.162162162162162) internal successors, (86), 77 states have internal predecessors, (86), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2023-12-21 08:10:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2023-12-21 08:10:16,687 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 50 [2023-12-21 08:10:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:10:16,687 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2023-12-21 08:10:16,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 7 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-21 08:10:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2023-12-21 08:10:16,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-21 08:10:16,689 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:10:16,689 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 08:10:16,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-21 08:10:16,894 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 [2023-12-21 08:10:16,895 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:10:16,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:10:16,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1101293608, now seen corresponding path program 2 times [2023-12-21 08:10:16,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:10:16,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599751702] [2023-12-21 08:10:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:10:16,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:10:16,904 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:10:16,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737819933] [2023-12-21 08:10:16,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 08:10:16,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:10:16,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:10:16,906 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) [2023-12-21 08:10:16,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 08:10:16,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 08:10:16,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 08:10:16,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-21 08:10:16,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:10:18,041 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 08:10:18,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 08:10:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 39 proven. 12 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-21 08:10:20,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:10:20,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599751702] [2023-12-21 08:10:20,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:10:20,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737819933] [2023-12-21 08:10:20,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737819933] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 08:10:20,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 08:10:20,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 30 [2023-12-21 08:10:20,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075116841] [2023-12-21 08:10:20,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 08:10:20,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-21 08:10:20,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:10:20,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-21 08:10:20,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2023-12-21 08:10:20,779 INFO L87 Difference]: Start difference. First operand 99 states and 120 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 26 states have internal predecessors, (55), 10 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-12-21 08:10:26,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:10:26,008 INFO L93 Difference]: Finished difference Result 152 states and 188 transitions. [2023-12-21 08:10:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-21 08:10:26,009 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 26 states have internal predecessors, (55), 10 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 59 [2023-12-21 08:10:26,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:10:26,010 INFO L225 Difference]: With dead ends: 152 [2023-12-21 08:10:26,010 INFO L226 Difference]: Without dead ends: 150 [2023-12-21 08:10:26,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=401, Invalid=1951, Unknown=0, NotChecked=0, Total=2352 [2023-12-21 08:10:26,013 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 59 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-21 08:10:26,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 265 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-21 08:10:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-12-21 08:10:26,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-12-21 08:10:26,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 118 states have internal predecessors, (134), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-21 08:10:26,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 186 transitions. [2023-12-21 08:10:26,049 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 186 transitions. Word has length 59 [2023-12-21 08:10:26,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:10:26,049 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 186 transitions. [2023-12-21 08:10:26,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 26 states have internal predecessors, (55), 10 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-12-21 08:10:26,050 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 186 transitions. [2023-12-21 08:10:26,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-21 08:10:26,051 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:10:26,051 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 08:10:26,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-21 08:10:26,259 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 [2023-12-21 08:10:26,260 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:10:26,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:10:26,260 INFO L85 PathProgramCache]: Analyzing trace with hash -896381747, now seen corresponding path program 3 times [2023-12-21 08:10:26,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:10:26,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557302671] [2023-12-21 08:10:26,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:10:26,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:10:26,276 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:10:26,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970115726] [2023-12-21 08:10:26,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 08:10:26,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:10:26,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:10:26,280 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) [2023-12-21 08:10:26,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-21 08:10:26,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-21 08:10:26,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 08:10:26,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-21 08:10:26,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:10:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 26 proven. 68 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-21 08:10:39,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 08:10:41,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:10:41,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557302671] [2023-12-21 08:10:41,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:10:41,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970115726] [2023-12-21 08:10:41,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970115726] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 08:10:41,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 08:10:41,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-12-21 08:10:41,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640110878] [2023-12-21 08:10:41,555 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 08:10:41,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-21 08:10:41,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:10:41,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-21 08:10:41,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=817, Unknown=1, NotChecked=0, Total=992 [2023-12-21 08:10:41,556 INFO L87 Difference]: Start difference. First operand 150 states and 186 transitions. Second operand has 25 states, 24 states have (on average 1.625) internal successors, (39), 20 states have internal predecessors, (39), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-21 08:10:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:10:43,414 INFO L93 Difference]: Finished difference Result 197 states and 235 transitions. [2023-12-21 08:10:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-21 08:10:43,414 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.625) internal successors, (39), 20 states have internal predecessors, (39), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2023-12-21 08:10:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:10:43,416 INFO L225 Difference]: With dead ends: 197 [2023-12-21 08:10:43,416 INFO L226 Difference]: Without dead ends: 195 [2023-12-21 08:10:43,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=201, Invalid=1058, Unknown=1, NotChecked=0, Total=1260 [2023-12-21 08:10:43,417 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-21 08:10:43,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 204 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-21 08:10:43,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-12-21 08:10:43,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 180. [2023-12-21 08:10:43,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 137 states have (on average 1.1605839416058394) internal successors, (159), 141 states have internal predecessors, (159), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2023-12-21 08:10:43,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 215 transitions. [2023-12-21 08:10:43,457 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 215 transitions. Word has length 68 [2023-12-21 08:10:43,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:10:43,457 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 215 transitions. [2023-12-21 08:10:43,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.625) internal successors, (39), 20 states have internal predecessors, (39), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-21 08:10:43,457 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 215 transitions. [2023-12-21 08:10:43,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-21 08:10:43,461 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:10:43,461 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 08:10:43,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-21 08:10:43,663 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 [2023-12-21 08:10:43,664 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:10:43,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:10:43,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1804580100, now seen corresponding path program 4 times [2023-12-21 08:10:43,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:10:43,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650816085] [2023-12-21 08:10:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:10:43,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:10:43,672 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:10:43,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700237496] [2023-12-21 08:10:43,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 08:10:43,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:10:43,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:10:43,674 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) [2023-12-21 08:10:43,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-21 08:10:43,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 08:10:43,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 08:10:43,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-21 08:10:43,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:10:58,170 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 16 proven. 107 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-21 08:10:58,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 08:13:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 65 proven. 40 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-21 08:13:26,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:13:26,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650816085] [2023-12-21 08:13:26,200 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:13:26,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700237496] [2023-12-21 08:13:26,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700237496] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 08:13:26,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 08:13:26,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15] total 36 [2023-12-21 08:13:26,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573009784] [2023-12-21 08:13:26,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 08:13:26,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-21 08:13:26,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:13:26,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-21 08:13:26,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1060, Unknown=8, NotChecked=0, Total=1260 [2023-12-21 08:13:26,203 INFO L87 Difference]: Start difference. First operand 180 states and 215 transitions. Second operand has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 34 states have internal predecessors, (65), 12 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2023-12-21 08:13:30,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:13:31,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:13:42,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:13:52,243 WARN L293 SmtUtils]: Spent 7.91s on a formula simplification. DAG size of input: 40 DAG size of output: 14 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 08:13:54,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.35s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:13:57,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.96s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:14:01,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:14:13,729 WARN L293 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 279 DAG size of output: 18 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 08:14:15,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:14:18,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.96s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:14:20,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:14:36,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:14:41,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:15:17,590 WARN L293 SmtUtils]: Spent 7.33s on a formula simplification. DAG size of input: 295 DAG size of output: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 08:15:31,605 WARN L293 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 109 DAG size of output: 18 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 08:16:24,986 WARN L293 SmtUtils]: Spent 8.96s on a formula simplification. DAG size of input: 159 DAG size of output: 48 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 08:16:29,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-21 08:16:45,273 WARN L293 SmtUtils]: Spent 6.58s on a formula simplification. DAG size of input: 301 DAG size of output: 52 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 08:16:47,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-21 08:16:49,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-21 08:17:05,827 WARN L293 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 176 DAG size of output: 66 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 08:17:08,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-21 08:17:12,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-21 08:17:17,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-21 08:17:22,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-21 08:17:25,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-21 08:17:39,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-21 08:18:40,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:19:13,866 WARN L293 SmtUtils]: Spent 7.18s on a formula simplification. DAG size of input: 89 DAG size of output: 36 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 08:19:15,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:19:18,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:19:29,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:19:48,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:19:50,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:19:51,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:19:56,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:19:56,802 INFO L93 Difference]: Finished difference Result 265 states and 324 transitions. [2023-12-21 08:19:56,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-21 08:19:56,802 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 34 states have internal predecessors, (65), 12 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) Word has length 77 [2023-12-21 08:19:56,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:19:56,804 INFO L225 Difference]: With dead ends: 265 [2023-12-21 08:19:56,804 INFO L226 Difference]: Without dead ends: 263 [2023-12-21 08:19:56,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 431.0s TimeCoverageRelationStatistics Valid=507, Invalid=2544, Unknown=29, NotChecked=0, Total=3080 [2023-12-21 08:19:56,805 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 45 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.2s IncrementalHoareTripleChecker+Time [2023-12-21 08:19:56,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 505 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 780 Invalid, 6 Unknown, 0 Unchecked, 86.2s Time] [2023-12-21 08:19:56,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-12-21 08:19:56,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 261. [2023-12-21 08:19:56,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 200 states have (on average 1.17) internal successors, (234), 207 states have internal predecessors, (234), 43 states have call successors, (43), 17 states have call predecessors, (43), 17 states have return successors, (43), 36 states have call predecessors, (43), 43 states have call successors, (43) [2023-12-21 08:19:56,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 320 transitions. [2023-12-21 08:19:56,862 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 320 transitions. Word has length 77 [2023-12-21 08:19:56,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:19:56,863 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 320 transitions. [2023-12-21 08:19:56,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 34 states have internal predecessors, (65), 12 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2023-12-21 08:19:56,863 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 320 transitions. [2023-12-21 08:19:56,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-21 08:19:56,864 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:19:56,864 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 08:19:56,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-21 08:19:57,066 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 [2023-12-21 08:19:57,066 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:19:57,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:19:57,066 INFO L85 PathProgramCache]: Analyzing trace with hash 887350650, now seen corresponding path program 2 times [2023-12-21 08:19:57,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:19:57,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56685747] [2023-12-21 08:19:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:19:57,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:19:57,074 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:19:57,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574621804] [2023-12-21 08:19:57,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 08:19:57,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:19:57,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:19:57,075 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) [2023-12-21 08:19:57,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-21 08:19:57,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 08:19:57,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 08:19:57,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 58 conjunts are in the unsatisfiable core [2023-12-21 08:19:57,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:19:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 25 proven. 104 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-21 08:19:59,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 08:20:05,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:20:05,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56685747] [2023-12-21 08:20:05,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:20:05,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574621804] [2023-12-21 08:20:05,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574621804] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 08:20:05,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 08:20:05,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-12-21 08:20:05,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022540777] [2023-12-21 08:20:05,002 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 08:20:05,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-21 08:20:05,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:20:05,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-21 08:20:05,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2023-12-21 08:20:05,003 INFO L87 Difference]: Start difference. First operand 261 states and 320 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 9 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-21 08:20:07,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:20:08,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:20:08,644 INFO L93 Difference]: Finished difference Result 317 states and 383 transitions. [2023-12-21 08:20:08,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 08:20:08,644 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 9 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2023-12-21 08:20:08,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:20:08,646 INFO L225 Difference]: With dead ends: 317 [2023-12-21 08:20:08,646 INFO L226 Difference]: Without dead ends: 272 [2023-12-21 08:20:08,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2023-12-21 08:20:08,647 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 20 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-12-21 08:20:08,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 272 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-12-21 08:20:08,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-12-21 08:20:08,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2023-12-21 08:20:08,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 209 states have (on average 1.167464114832536) internal successors, (244), 215 states have internal predecessors, (244), 44 states have call successors, (44), 18 states have call predecessors, (44), 18 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2023-12-21 08:20:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 332 transitions. [2023-12-21 08:20:08,716 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 332 transitions. Word has length 77 [2023-12-21 08:20:08,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:20:08,716 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 332 transitions. [2023-12-21 08:20:08,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 9 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-21 08:20:08,716 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 332 transitions. [2023-12-21 08:20:08,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-21 08:20:08,718 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:20:08,718 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 08:20:08,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-21 08:20:08,923 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 [2023-12-21 08:20:08,924 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:20:08,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:20:08,924 INFO L85 PathProgramCache]: Analyzing trace with hash 77166703, now seen corresponding path program 5 times [2023-12-21 08:20:08,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:20:08,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528137168] [2023-12-21 08:20:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:20:08,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:20:08,937 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:20:08,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159063346] [2023-12-21 08:20:08,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 08:20:08,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:20:08,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:20:08,942 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) [2023-12-21 08:20:08,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-21 08:20:09,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-21 08:20:09,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 08:20:09,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-21 08:20:09,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:20:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 136 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-21 08:20:09,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 08:20:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 72 proven. 67 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-21 08:20:22,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:20:22,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528137168] [2023-12-21 08:20:22,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:20:22,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159063346] [2023-12-21 08:20:22,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159063346] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 08:20:22,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 08:20:22,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 37 [2023-12-21 08:20:22,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162238397] [2023-12-21 08:20:22,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 08:20:22,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-21 08:20:22,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:20:22,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-21 08:20:22,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1021, Unknown=0, NotChecked=0, Total=1332 [2023-12-21 08:20:22,671 INFO L87 Difference]: Start difference. First operand 272 states and 332 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 35 states have internal predecessors, (74), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2023-12-21 08:20:29,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:20:29,061 INFO L93 Difference]: Finished difference Result 467 states and 588 transitions. [2023-12-21 08:20:29,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-12-21 08:20:29,061 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 35 states have internal predecessors, (74), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 86 [2023-12-21 08:20:29,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:20:29,062 INFO L225 Difference]: With dead ends: 467 [2023-12-21 08:20:29,062 INFO L226 Difference]: Without dead ends: 96 [2023-12-21 08:20:29,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1590 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1847, Invalid=5463, Unknown=0, NotChecked=0, Total=7310 [2023-12-21 08:20:29,066 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 31 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-21 08:20:29,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 549 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-21 08:20:29,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-21 08:20:29,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-12-21 08:20:29,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 73 states have internal predecessors, (73), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-21 08:20:29,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2023-12-21 08:20:29,090 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 86 [2023-12-21 08:20:29,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:20:29,091 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2023-12-21 08:20:29,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 35 states have internal predecessors, (74), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2023-12-21 08:20:29,091 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2023-12-21 08:20:29,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-21 08:20:29,092 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:20:29,092 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 08:20:29,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-21 08:20:29,296 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 [2023-12-21 08:20:29,296 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:20:29,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:20:29,297 INFO L85 PathProgramCache]: Analyzing trace with hash 937043708, now seen corresponding path program 6 times [2023-12-21 08:20:29,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:20:29,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569551479] [2023-12-21 08:20:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:20:29,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:20:29,305 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:20:29,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553502697] [2023-12-21 08:20:29,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 08:20:29,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:20:29,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:20:29,307 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) [2023-12-21 08:20:29,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-21 08:20:29,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-12-21 08:20:29,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 08:20:29,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-21 08:20:29,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:20:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 322 proven. 3 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-12-21 08:20:30,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 08:20:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 220 proven. 27 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-12-21 08:20:51,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:20:51,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569551479] [2023-12-21 08:20:51,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:20:51,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553502697] [2023-12-21 08:20:51,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553502697] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 08:20:51,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 08:20:51,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2023-12-21 08:20:51,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321867909] [2023-12-21 08:20:51,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 08:20:51,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-21 08:20:51,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:20:51,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-21 08:20:51,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=960, Unknown=0, NotChecked=0, Total=1260 [2023-12-21 08:20:51,013 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 36 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 33 states have internal predecessors, (78), 18 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 19 states have call predecessors, (21), 18 states have call successors, (21) [2023-12-21 08:20:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:20:52,048 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2023-12-21 08:20:52,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-21 08:20:52,049 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 33 states have internal predecessors, (78), 18 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 19 states have call predecessors, (21), 18 states have call successors, (21) Word has length 113 [2023-12-21 08:20:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:20:52,049 INFO L225 Difference]: With dead ends: 100 [2023-12-21 08:20:52,049 INFO L226 Difference]: Without dead ends: 0 [2023-12-21 08:20:52,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=625, Invalid=1925, Unknown=0, NotChecked=0, Total=2550 [2023-12-21 08:20:52,051 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 18 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 08:20:52,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 316 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 08:20:52,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-21 08:20:52,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-21 08:20:52,051 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) [2023-12-21 08:20:52,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-21 08:20:52,051 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 113 [2023-12-21 08:20:52,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:20:52,051 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-21 08:20:52,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 33 states have internal predecessors, (78), 18 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 19 states have call predecessors, (21), 18 states have call successors, (21) [2023-12-21 08:20:52,052 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-21 08:20:52,052 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-21 08:20:52,053 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 08:20:52,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-21 08:20:52,259 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 [2023-12-21 08:20:52,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-21 08:21:35,500 WARN L293 SmtUtils]: Spent 41.76s on a formula simplification. DAG size of input: 617 DAG size of output: 142 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) Received shutdown request... [2023-12-21 08:23:42,612 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 08:23:43,812 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-21 08:23:43,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 [2023-12-21 08:23:43,935 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Not enough levels on assertion stack at de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.pop(UndoableWrapperScript.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.restore(UndoableWrapperScript.java:87) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:316) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter(HoareAnnotationComposer.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.(HoareAnnotationComposer.java:105) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeIcfgHoareAnnotation(NwaCegarLoop.java:539) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop$CegarLoopResultBuilder.getResult(AbstractCegarLoop.java:873) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-21 08:23:43,938 INFO L158 Benchmark]: Toolchain (without parser) took 873163.24ms. Allocated memory was 177.2MB in the beginning and 268.4MB in the end (delta: 91.2MB). Free memory was 132.6MB in the beginning and 158.3MB in the end (delta: -25.7MB). Peak memory consumption was 150.0MB. Max. memory is 8.0GB. [2023-12-21 08:23:43,938 INFO L158 Benchmark]: CDTParser took 0.49ms. Allocated memory is still 177.2MB. Free memory is still 133.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 08:23:43,938 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.29ms. Allocated memory is still 177.2MB. Free memory was 132.3MB in the beginning and 121.5MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-21 08:23:43,939 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.19ms. Allocated memory is still 177.2MB. Free memory was 121.5MB in the beginning and 120.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 08:23:43,939 INFO L158 Benchmark]: Boogie Preprocessor took 50.00ms. Allocated memory is still 177.2MB. Free memory was 120.0MB in the beginning and 118.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 08:23:43,939 INFO L158 Benchmark]: RCFGBuilder took 268.23ms. Allocated memory is still 177.2MB. Free memory was 118.3MB in the beginning and 107.5MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-21 08:23:43,939 INFO L158 Benchmark]: TraceAbstraction took 872567.62ms. Allocated memory was 177.2MB in the beginning and 268.4MB in the end (delta: 91.2MB). Free memory was 106.8MB in the beginning and 158.3MB in the end (delta: -51.6MB). Peak memory consumption was 123.7MB. Max. memory is 8.0GB. [2023-12-21 08:23:43,941 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49ms. Allocated memory is still 177.2MB. Free memory is still 133.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 241.29ms. Allocated memory is still 177.2MB. Free memory was 132.3MB in the beginning and 121.5MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 29.19ms. Allocated memory is still 177.2MB. Free memory was 121.5MB in the beginning and 120.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 50.00ms. Allocated memory is still 177.2MB. Free memory was 120.0MB in the beginning and 118.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 268.23ms. Allocated memory is still 177.2MB. Free memory was 118.3MB in the beginning and 107.5MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 872567.62ms. Allocated memory was 177.2MB in the beginning and 268.4MB in the end (delta: 91.2MB). Free memory was 106.8MB in the beginning and 158.3MB in the end (delta: -51.6MB). Peak memory consumption was 123.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Not enough levels on assertion stack de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Not enough levels on assertion stack: de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown