/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 20:53:19,102 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 20:53:19,164 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 20:53:19,167 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 20:53:19,167 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 20:53:19,191 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 20:53:19,192 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 20:53:19,192 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 20:53:19,193 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 20:53:19,195 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 20:53:19,196 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 20:53:19,196 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 20:53:19,196 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 20:53:19,197 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 20:53:19,197 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 20:53:19,197 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 20:53:19,198 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 20:53:19,198 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 20:53:19,198 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 20:53:19,199 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 20:53:19,199 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 20:53:19,199 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 20:53:19,199 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 20:53:19,200 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 20:53:19,200 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 20:53:19,200 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 20:53:19,200 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 20:53:19,200 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 20:53:19,201 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 20:53:19,201 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 20:53:19,202 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 20:53:19,202 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 20:53:19,202 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 20:53:19,202 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 20:53:19,202 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 20:53:19,202 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 20:53:19,202 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 20:53:19,202 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 20:53:19,203 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 20:53:19,203 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 20:53:19,203 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 20:53:19,203 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 20:53:19,204 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 20:53:19,204 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 20:53:19,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 20:53:19,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 20:53:19,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 20:53:19,389 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 20:53:19,389 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 20:53:19,390 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound10.c [2023-12-19 20:53:20,499 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 20:53:20,644 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 20:53:20,644 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound10.c [2023-12-19 20:53:20,650 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42ba9b7d8/7d015c37cfdc40c0abd90c11451db608/FLAGd7e36c8ef [2023-12-19 20:53:20,659 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42ba9b7d8/7d015c37cfdc40c0abd90c11451db608 [2023-12-19 20:53:20,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 20:53:20,662 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 20:53:20,662 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 20:53:20,663 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 20:53:20,673 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 20:53:20,673 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 08:53:20" (1/1) ... [2023-12-19 20:53:20,674 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37b37333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 08:53:20, skipping insertion in model container [2023-12-19 20:53:20,674 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 08:53:20" (1/1) ... [2023-12-19 20:53:20,692 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 20:53:20,810 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/hard2_unwindbound10.c[526,539] [2023-12-19 20:53:20,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 20:53:20,851 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 20:53:20,864 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/hard2_unwindbound10.c[526,539] [2023-12-19 20:53:20,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 20:53:20,890 INFO L206 MainTranslator]: Completed translation [2023-12-19 20:53:20,890 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 08:53:20 WrapperNode [2023-12-19 20:53:20,890 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 20:53:20,891 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 20:53:20,891 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 20:53:20,892 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 20:53:20,896 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 08:53:20" (1/1) ... [2023-12-19 20:53:20,902 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 08:53:20" (1/1) ... [2023-12-19 20:53:20,928 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-12-19 20:53:20,929 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 20:53:20,929 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 20:53:20,929 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 20:53:20,929 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 20:53:20,936 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 08:53:20" (1/1) ... [2023-12-19 20:53:20,936 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 08:53:20" (1/1) ... [2023-12-19 20:53:20,948 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 08:53:20" (1/1) ... [2023-12-19 20:53:20,964 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2023-12-19 20:53:20,964 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 08:53:20" (1/1) ... [2023-12-19 20:53:20,965 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 08:53:20" (1/1) ... [2023-12-19 20:53:20,975 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 08:53:20" (1/1) ... [2023-12-19 20:53:20,979 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 08:53:20" (1/1) ... [2023-12-19 20:53:20,983 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 08:53:20" (1/1) ... [2023-12-19 20:53:20,984 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 08:53:20" (1/1) ... [2023-12-19 20:53:20,986 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 20:53:20,987 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 20:53:20,987 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 20:53:20,987 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 20:53:20,989 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 08:53:20" (1/1) ... [2023-12-19 20:53:21,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 20:53:21,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:53:21,069 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-19 20:53:21,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-19 20:53:21,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 20:53:21,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 20:53:21,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-19 20:53:21,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 20:53:21,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 20:53:21,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-19 20:53:21,134 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-19 20:53:21,185 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 20:53:21,186 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 20:53:21,283 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 20:53:21,299 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 20:53:21,299 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-19 20:53:21,299 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 08:53:21 BoogieIcfgContainer [2023-12-19 20:53:21,299 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 20:53:21,301 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 20:53:21,301 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 20:53:21,303 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 20:53:21,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 08:53:20" (1/3) ... [2023-12-19 20:53:21,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b876a3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 08:53:21, skipping insertion in model container [2023-12-19 20:53:21,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 08:53:20" (2/3) ... [2023-12-19 20:53:21,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b876a3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 08:53:21, skipping insertion in model container [2023-12-19 20:53:21,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 08:53:21" (3/3) ... [2023-12-19 20:53:21,304 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound10.c [2023-12-19 20:53:21,315 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 20:53:21,315 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 20:53:21,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 20:53:21,345 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;@716daba5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 20:53:21,345 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 20:53:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-19 20:53:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-19 20:53:21,352 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:53:21,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:53:21,353 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:53:21,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:53:21,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1291730102, now seen corresponding path program 1 times [2023-12-19 20:53:21,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:53:21,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099977110] [2023-12-19 20:53:21,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:21,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:53:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:53:21,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:53:21,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099977110] [2023-12-19 20:53:21,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-19 20:53:21,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98607672] [2023-12-19 20:53:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:21,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:53:21,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:53:21,469 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:53:21,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 20:53:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:53:21,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-19 20:53:21,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:53:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 20:53:21,550 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 20:53:21,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98607672] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 20:53:21,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 20:53:21,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 20:53:21,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840501027] [2023-12-19 20:53:21,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 20:53:21,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 20:53:21,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:53:21,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 20:53:21,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 20:53:21,590 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 20:53:21,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:53:21,622 INFO L93 Difference]: Finished difference Result 45 states and 78 transitions. [2023-12-19 20:53:21,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 20:53:21,624 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-19 20:53:21,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:53:21,628 INFO L225 Difference]: With dead ends: 45 [2023-12-19 20:53:21,628 INFO L226 Difference]: Without dead ends: 21 [2023-12-19 20:53:21,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 20:53:21,634 INFO L413 NwaCegarLoop]: 31 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, 31 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 20:53:21,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 20:53:21,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-19 20:53:21,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-19 20:53:21,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-19 20:53:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions. [2023-12-19 20:53:21,666 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 31 transitions. Word has length 7 [2023-12-19 20:53:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:53:21,666 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 31 transitions. [2023-12-19 20:53:21,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 20:53:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 31 transitions. [2023-12-19 20:53:21,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-19 20:53:21,668 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:53:21,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:53:21,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-19 20:53:21,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-19 20:53:21,875 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:53:21,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:53:21,875 INFO L85 PathProgramCache]: Analyzing trace with hash 829671692, now seen corresponding path program 1 times [2023-12-19 20:53:21,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:53:21,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097887092] [2023-12-19 20:53:21,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:21,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:53:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:53:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 20:53:21,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:53:21,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097887092] [2023-12-19 20:53:21,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097887092] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 20:53:21,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 20:53:21,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 20:53:21,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180342650] [2023-12-19 20:53:21,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 20:53:21,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 20:53:21,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:53:21,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 20:53:21,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 20:53:21,975 INFO L87 Difference]: Start difference. First operand 21 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 20:53:22,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:53:22,014 INFO L93 Difference]: Finished difference Result 35 states and 50 transitions. [2023-12-19 20:53:22,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 20:53:22,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-19 20:53:22,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:53:22,015 INFO L225 Difference]: With dead ends: 35 [2023-12-19 20:53:22,015 INFO L226 Difference]: Without dead ends: 33 [2023-12-19 20:53:22,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-19 20:53:22,016 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 20:53:22,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 89 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 20:53:22,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-19 20:53:22,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2023-12-19 20:53:22,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-19 20:53:22,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2023-12-19 20:53:22,022 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 7 [2023-12-19 20:53:22,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:53:22,022 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2023-12-19 20:53:22,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 20:53:22,023 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2023-12-19 20:53:22,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-19 20:53:22,023 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:53:22,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:53:22,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-19 20:53:22,023 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:53:22,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:53:22,024 INFO L85 PathProgramCache]: Analyzing trace with hash -166824855, now seen corresponding path program 1 times [2023-12-19 20:53:22,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:53:22,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627954334] [2023-12-19 20:53:22,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:22,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:53:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:53:22,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:53:22,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627954334] [2023-12-19 20:53:22,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-19 20:53:22,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122668860] [2023-12-19 20:53:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:22,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:53:22,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:53:22,040 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:53:22,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 20:53:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:53:22,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-19 20:53:22,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:53:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 20:53:22,137 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 20:53:22,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122668860] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 20:53:22,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 20:53:22,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 20:53:22,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835106403] [2023-12-19 20:53:22,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 20:53:22,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 20:53:22,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:53:22,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 20:53:22,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 20:53:22,139 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 20:53:22,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:53:22,156 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2023-12-19 20:53:22,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 20:53:22,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-19 20:53:22,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:53:22,158 INFO L225 Difference]: With dead ends: 41 [2023-12-19 20:53:22,158 INFO L226 Difference]: Without dead ends: 27 [2023-12-19 20:53:22,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 20:53:22,159 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 20:53:22,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 20:53:22,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-19 20:53:22,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-12-19 20:53:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-19 20:53:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2023-12-19 20:53:22,163 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 9 [2023-12-19 20:53:22,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:53:22,164 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2023-12-19 20:53:22,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 20:53:22,164 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2023-12-19 20:53:22,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-19 20:53:22,164 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:53:22,164 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:53:22,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 20:53:22,370 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,SelfDestructingSolverStorable2 [2023-12-19 20:53:22,370 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:53:22,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:53:22,371 INFO L85 PathProgramCache]: Analyzing trace with hash -439138420, now seen corresponding path program 1 times [2023-12-19 20:53:22,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:53:22,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215437789] [2023-12-19 20:53:22,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:22,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:53:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:53:22,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-19 20:53:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:53:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 20:53:22,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:53:22,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215437789] [2023-12-19 20:53:22,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215437789] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 20:53:22,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 20:53:22,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 20:53:22,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328533946] [2023-12-19 20:53:22,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 20:53:22,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 20:53:22,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:53:22,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 20:53:22,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 20:53:22,467 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-19 20:53:22,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:53:22,498 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2023-12-19 20:53:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 20:53:22,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-12-19 20:53:22,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:53:22,499 INFO L225 Difference]: With dead ends: 41 [2023-12-19 20:53:22,499 INFO L226 Difference]: Without dead ends: 39 [2023-12-19 20:53:22,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-19 20:53:22,500 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 20:53:22,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 85 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 20:53:22,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-19 20:53:22,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2023-12-19 20:53:22,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-19 20:53:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-12-19 20:53:22,505 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 12 [2023-12-19 20:53:22,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:53:22,505 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-12-19 20:53:22,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-19 20:53:22,506 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-12-19 20:53:22,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-19 20:53:22,506 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:53:22,506 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:53:22,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-19 20:53:22,506 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:53:22,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:53:22,507 INFO L85 PathProgramCache]: Analyzing trace with hash -235147060, now seen corresponding path program 1 times [2023-12-19 20:53:22,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:53:22,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575932870] [2023-12-19 20:53:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:22,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:53:22,514 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:53:22,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791645264] [2023-12-19 20:53:22,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:22,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:53:22,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:53:22,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:53:22,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 20:53:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:53:22,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-19 20:53:22,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:53:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 20:53:22,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:53:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 20:53:22,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:53:22,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575932870] [2023-12-19 20:53:22,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:53:22,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791645264] [2023-12-19 20:53:22,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791645264] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:53:22,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:53:22,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-12-19 20:53:22,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849302349] [2023-12-19 20:53:22,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:53:22,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 20:53:22,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:53:22,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 20:53:22,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-12-19 20:53:22,730 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 20:53:22,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:53:22,949 INFO L93 Difference]: Finished difference Result 70 states and 95 transitions. [2023-12-19 20:53:22,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 20:53:22,950 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2023-12-19 20:53:22,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:53:22,952 INFO L225 Difference]: With dead ends: 70 [2023-12-19 20:53:22,952 INFO L226 Difference]: Without dead ends: 55 [2023-12-19 20:53:22,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-12-19 20:53:22,953 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 20:53:22,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 74 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 20:53:22,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-19 20:53:22,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-12-19 20:53:22,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.28125) internal successors, (41), 35 states have internal predecessors, (41), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-19 20:53:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2023-12-19 20:53:22,962 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 17 [2023-12-19 20:53:22,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:53:22,962 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2023-12-19 20:53:22,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 20:53:22,962 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2023-12-19 20:53:22,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-19 20:53:22,963 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:53:22,963 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:53:22,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 20:53:23,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:53:23,168 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:53:23,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:53:23,168 INFO L85 PathProgramCache]: Analyzing trace with hash 2012527405, now seen corresponding path program 1 times [2023-12-19 20:53:23,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:53:23,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894507496] [2023-12-19 20:53:23,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:23,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:53:23,175 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:53:23,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038800682] [2023-12-19 20:53:23,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:23,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:53:23,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:53:23,176 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:53:23,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 20:53:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:53:23,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-19 20:53:23,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:53:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 20:53:23,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:53:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 20:53:23,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:53:23,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894507496] [2023-12-19 20:53:23,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:53:23,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038800682] [2023-12-19 20:53:23,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038800682] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:53:23,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:53:23,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-12-19 20:53:23,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262656765] [2023-12-19 20:53:23,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:53:23,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-19 20:53:23,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:53:23,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-19 20:53:23,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-19 20:53:23,398 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-19 20:53:23,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:53:23,482 INFO L93 Difference]: Finished difference Result 72 states and 96 transitions. [2023-12-19 20:53:23,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 20:53:23,482 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2023-12-19 20:53:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:53:23,483 INFO L225 Difference]: With dead ends: 72 [2023-12-19 20:53:23,483 INFO L226 Difference]: Without dead ends: 64 [2023-12-19 20:53:23,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-12-19 20:53:23,484 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 20:53:23,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 117 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 20:53:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-19 20:53:23,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2023-12-19 20:53:23,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 42 states have internal predecessors, (49), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-19 20:53:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2023-12-19 20:53:23,492 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 25 [2023-12-19 20:53:23,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:53:23,493 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2023-12-19 20:53:23,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-19 20:53:23,493 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2023-12-19 20:53:23,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-19 20:53:23,494 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:53:23,494 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:53:23,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 20:53:23,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:53:23,698 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:53:23,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:53:23,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2049051340, now seen corresponding path program 1 times [2023-12-19 20:53:23,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:53:23,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166789234] [2023-12-19 20:53:23,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:23,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:53:23,705 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:53:23,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902529297] [2023-12-19 20:53:23,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:23,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:53:23,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:53:23,716 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:53:23,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 20:53:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:53:23,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-19 20:53:23,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:53:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-19 20:53:23,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:53:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-19 20:53:23,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:53:23,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166789234] [2023-12-19 20:53:23,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:53:23,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902529297] [2023-12-19 20:53:23,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902529297] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:53:23,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:53:23,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-12-19 20:53:23,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084346453] [2023-12-19 20:53:23,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:53:23,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 20:53:23,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:53:23,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 20:53:23,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-19 20:53:23,860 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-19 20:53:23,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:53:23,943 INFO L93 Difference]: Finished difference Result 164 states and 204 transitions. [2023-12-19 20:53:23,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-19 20:53:23,944 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 32 [2023-12-19 20:53:23,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:53:23,946 INFO L225 Difference]: With dead ends: 164 [2023-12-19 20:53:23,946 INFO L226 Difference]: Without dead ends: 126 [2023-12-19 20:53:23,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-12-19 20:53:23,949 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 20:53:23,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 138 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 20:53:23,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-19 20:53:23,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2023-12-19 20:53:23,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 78 states have (on average 1.1923076923076923) internal successors, (93), 82 states have internal predecessors, (93), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2023-12-19 20:53:23,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 143 transitions. [2023-12-19 20:53:23,962 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 143 transitions. Word has length 32 [2023-12-19 20:53:23,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:53:23,962 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 143 transitions. [2023-12-19 20:53:23,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-19 20:53:23,962 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 143 transitions. [2023-12-19 20:53:23,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-19 20:53:23,963 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:53:23,963 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:53:23,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 20:53:24,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:53:24,168 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:53:24,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:53:24,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1125945480, now seen corresponding path program 1 times [2023-12-19 20:53:24,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:53:24,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015637829] [2023-12-19 20:53:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:24,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:53:24,174 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:53:24,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103961571] [2023-12-19 20:53:24,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:24,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:53:24,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:53:24,178 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:53:24,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 20:53:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:53:24,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 20:53:24,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:53:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-19 20:53:24,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:53:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-12-19 20:53:24,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:53:24,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015637829] [2023-12-19 20:53:24,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:53:24,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103961571] [2023-12-19 20:53:24,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103961571] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:53:24,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:53:24,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-12-19 20:53:24,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246895146] [2023-12-19 20:53:24,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:53:24,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 20:53:24,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:53:24,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 20:53:24,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-12-19 20:53:24,369 INFO L87 Difference]: Start difference. First operand 120 states and 143 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-12-19 20:53:24,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:53:24,475 INFO L93 Difference]: Finished difference Result 248 states and 306 transitions. [2023-12-19 20:53:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-19 20:53:24,475 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 48 [2023-12-19 20:53:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:53:24,476 INFO L225 Difference]: With dead ends: 248 [2023-12-19 20:53:24,476 INFO L226 Difference]: Without dead ends: 227 [2023-12-19 20:53:24,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-12-19 20:53:24,477 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 80 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 20:53:24,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 174 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 20:53:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-12-19 20:53:24,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2023-12-19 20:53:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 143 states have (on average 1.1958041958041958) internal successors, (171), 154 states have internal predecessors, (171), 51 states have call successors, (51), 26 states have call predecessors, (51), 25 states have return successors, (47), 39 states have call predecessors, (47), 47 states have call successors, (47) [2023-12-19 20:53:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 269 transitions. [2023-12-19 20:53:24,494 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 269 transitions. Word has length 48 [2023-12-19 20:53:24,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:53:24,495 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 269 transitions. [2023-12-19 20:53:24,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-12-19 20:53:24,495 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 269 transitions. [2023-12-19 20:53:24,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-19 20:53:24,496 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:53:24,496 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:53:24,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 20:53:24,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:53:24,701 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:53:24,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:53:24,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1450073182, now seen corresponding path program 1 times [2023-12-19 20:53:24,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:53:24,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998142669] [2023-12-19 20:53:24,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:24,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:53:24,709 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:53:24,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159061748] [2023-12-19 20:53:24,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:24,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:53:24,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:53:24,712 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:53:24,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 20:53:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:53:24,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-19 20:53:24,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:53:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-19 20:53:25,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:53:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-19 20:53:26,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:53:26,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998142669] [2023-12-19 20:53:26,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:53:26,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159061748] [2023-12-19 20:53:26,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159061748] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:53:26,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:53:26,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-12-19 20:53:26,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902330712] [2023-12-19 20:53:26,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:53:26,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 20:53:26,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:53:26,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 20:53:26,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-12-19 20:53:26,035 INFO L87 Difference]: Start difference. First operand 220 states and 269 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-12-19 20:53:38,764 WARN L293 SmtUtils]: Spent 12.62s on a formula simplification. DAG size of input: 50 DAG size of output: 48 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 20:53:41,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:53:44,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:53:44,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:53:44,964 INFO L93 Difference]: Finished difference Result 371 states and 478 transitions. [2023-12-19 20:53:44,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-19 20:53:44,965 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 57 [2023-12-19 20:53:44,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:53:44,966 INFO L225 Difference]: With dead ends: 371 [2023-12-19 20:53:44,966 INFO L226 Difference]: Without dead ends: 298 [2023-12-19 20:53:44,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-12-19 20:53:44,967 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 54 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-12-19 20:53:44,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 275 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-12-19 20:53:44,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-12-19 20:53:45,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 271. [2023-12-19 20:53:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 185 states have (on average 1.227027027027027) internal successors, (227), 193 states have internal predecessors, (227), 56 states have call successors, (56), 29 states have call predecessors, (56), 29 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2023-12-19 20:53:45,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 337 transitions. [2023-12-19 20:53:45,015 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 337 transitions. Word has length 57 [2023-12-19 20:53:45,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:53:45,016 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 337 transitions. [2023-12-19 20:53:45,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-12-19 20:53:45,017 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 337 transitions. [2023-12-19 20:53:45,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-19 20:53:45,022 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:53:45,022 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:53:45,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-19 20:53:45,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:53:45,223 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:53:45,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:53:45,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1715906499, now seen corresponding path program 1 times [2023-12-19 20:53:45,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:53:45,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262742846] [2023-12-19 20:53:45,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:45,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:53:45,229 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:53:45,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881421348] [2023-12-19 20:53:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:45,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:53:45,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:53:45,246 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:53:45,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 20:53:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:53:45,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-19 20:53:45,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:53:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-12-19 20:53:45,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:53:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-12-19 20:53:46,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:53:46,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262742846] [2023-12-19 20:53:46,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:53:46,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881421348] [2023-12-19 20:53:46,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881421348] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:53:46,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:53:46,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-12-19 20:53:46,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220713286] [2023-12-19 20:53:46,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:53:46,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-19 20:53:46,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:53:46,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-19 20:53:46,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-12-19 20:53:46,014 INFO L87 Difference]: Start difference. First operand 271 states and 337 transitions. Second operand has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2023-12-19 20:53:46,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:53:46,602 INFO L93 Difference]: Finished difference Result 340 states and 422 transitions. [2023-12-19 20:53:46,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-19 20:53:46,602 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) Word has length 68 [2023-12-19 20:53:46,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:53:46,605 INFO L225 Difference]: With dead ends: 340 [2023-12-19 20:53:46,605 INFO L226 Difference]: Without dead ends: 259 [2023-12-19 20:53:46,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-12-19 20:53:46,606 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 32 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 20:53:46,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 259 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 20:53:46,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-12-19 20:53:46,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2023-12-19 20:53:46,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 160 states have (on average 1.18125) internal successors, (189), 164 states have internal predecessors, (189), 46 states have call successors, (46), 29 states have call predecessors, (46), 28 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2023-12-19 20:53:46,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 279 transitions. [2023-12-19 20:53:46,649 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 279 transitions. Word has length 68 [2023-12-19 20:53:46,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:53:46,649 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 279 transitions. [2023-12-19 20:53:46,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 15 states have internal predecessors, (41), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2023-12-19 20:53:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 279 transitions. [2023-12-19 20:53:46,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-19 20:53:46,650 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:53:46,650 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:53:46,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-19 20:53:46,854 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,SelfDestructingSolverStorable9 [2023-12-19 20:53:46,855 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:53:46,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:53:46,855 INFO L85 PathProgramCache]: Analyzing trace with hash 970851771, now seen corresponding path program 1 times [2023-12-19 20:53:46,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:53:46,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356495020] [2023-12-19 20:53:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:46,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:53:46,861 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:53:46,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559467206] [2023-12-19 20:53:46,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:46,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:53:46,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:53:46,866 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:53:46,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 20:53:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:53:46,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-19 20:53:46,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:53:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-12-19 20:53:47,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:53:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-12-19 20:53:47,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:53:47,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356495020] [2023-12-19 20:53:47,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:53:47,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559467206] [2023-12-19 20:53:47,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559467206] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:53:47,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:53:47,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-12-19 20:53:47,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903557256] [2023-12-19 20:53:47,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:53:47,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 20:53:47,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:53:47,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 20:53:47,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-12-19 20:53:47,350 INFO L87 Difference]: Start difference. First operand 235 states and 279 transitions. Second operand has 12 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-12-19 20:53:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:53:47,567 INFO L93 Difference]: Finished difference Result 262 states and 311 transitions. [2023-12-19 20:53:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-19 20:53:47,568 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 73 [2023-12-19 20:53:47,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:53:47,569 INFO L225 Difference]: With dead ends: 262 [2023-12-19 20:53:47,569 INFO L226 Difference]: Without dead ends: 217 [2023-12-19 20:53:47,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-12-19 20:53:47,569 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 15 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 20:53:47,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 233 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 20:53:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-12-19 20:53:47,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 209. [2023-12-19 20:53:47,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 143 states have (on average 1.1538461538461537) internal successors, (165), 146 states have internal predecessors, (165), 40 states have call successors, (40), 25 states have call predecessors, (40), 25 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2023-12-19 20:53:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 244 transitions. [2023-12-19 20:53:47,603 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 244 transitions. Word has length 73 [2023-12-19 20:53:47,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:53:47,603 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 244 transitions. [2023-12-19 20:53:47,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-12-19 20:53:47,603 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 244 transitions. [2023-12-19 20:53:47,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-19 20:53:47,604 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:53:47,604 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-12-19 20:53:47,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-19 20:53:47,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:53:47,818 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:53:47,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:53:47,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1153550505, now seen corresponding path program 2 times [2023-12-19 20:53:47,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:53:47,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043689588] [2023-12-19 20:53:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:53:47,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:53:47,824 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:53:47,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731796829] [2023-12-19 20:53:47,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 20:53:47,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:53:47,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:53:47,825 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:53:47,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 20:53:47,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 20:53:47,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 20:53:47,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-19 20:53:47,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:53:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-12-19 20:53:48,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:54:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-12-19 20:54:13,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:54:13,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043689588] [2023-12-19 20:54:13,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:54:13,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731796829] [2023-12-19 20:54:13,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731796829] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:54:13,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:54:13,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-12-19 20:54:13,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666737154] [2023-12-19 20:54:13,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:54:13,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-19 20:54:13,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:54:13,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-19 20:54:13,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-12-19 20:54:13,706 INFO L87 Difference]: Start difference. First operand 209 states and 244 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-12-19 20:55:09,403 WARN L293 SmtUtils]: Spent 55.50s on a formula simplification. DAG size of input: 168 DAG size of output: 82 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 20:55:13,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:55:14,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:55:19,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:55:31,452 WARN L293 SmtUtils]: Spent 11.73s on a formula simplification. DAG size of input: 56 DAG size of output: 48 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 20:55:35,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:55:37,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:55:38,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:55:42,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:55:46,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:55:50,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:55:55,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:55:58,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:56:06,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:56:07,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:56:07,043 INFO L93 Difference]: Finished difference Result 307 states and 395 transitions. [2023-12-19 20:56:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-19 20:56:07,044 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 89 [2023-12-19 20:56:07,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:56:07,045 INFO L225 Difference]: With dead ends: 307 [2023-12-19 20:56:07,045 INFO L226 Difference]: Without dead ends: 257 [2023-12-19 20:56:07,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 78.4s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-12-19 20:56:07,046 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 110 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 122 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.2s IncrementalHoareTripleChecker+Time [2023-12-19 20:56:07,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 603 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 600 Invalid, 6 Unknown, 0 Unchecked, 41.2s Time] [2023-12-19 20:56:07,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-12-19 20:56:07,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 245. [2023-12-19 20:56:07,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 165 states have (on average 1.206060606060606) internal successors, (199), 173 states have internal predecessors, (199), 53 states have call successors, (53), 26 states have call predecessors, (53), 26 states have return successors, (52), 45 states have call predecessors, (52), 52 states have call successors, (52) [2023-12-19 20:56:07,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 304 transitions. [2023-12-19 20:56:07,115 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 304 transitions. Word has length 89 [2023-12-19 20:56:07,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:56:07,115 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 304 transitions. [2023-12-19 20:56:07,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-12-19 20:56:07,115 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 304 transitions. [2023-12-19 20:56:07,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-19 20:56:07,116 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:56:07,116 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:56:07,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-19 20:56:07,316 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,SelfDestructingSolverStorable11 [2023-12-19 20:56:07,316 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:56:07,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:56:07,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1792633709, now seen corresponding path program 1 times [2023-12-19 20:56:07,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:56:07,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441873373] [2023-12-19 20:56:07,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:56:07,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:56:07,322 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:56:07,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366602254] [2023-12-19 20:56:07,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:56:07,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:56:07,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:56:07,336 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:56:07,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 20:56:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:56:07,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-19 20:56:07,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:56:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-19 20:56:07,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:56:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-12-19 20:56:07,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:56:07,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441873373] [2023-12-19 20:56:07,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:56:07,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366602254] [2023-12-19 20:56:07,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366602254] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:56:07,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:56:07,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-12-19 20:56:07,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501819165] [2023-12-19 20:56:07,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:56:07,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 20:56:07,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:56:07,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 20:56:07,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-19 20:56:07,607 INFO L87 Difference]: Start difference. First operand 245 states and 304 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2023-12-19 20:56:07,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:56:07,954 INFO L93 Difference]: Finished difference Result 702 states and 938 transitions. [2023-12-19 20:56:07,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-19 20:56:07,954 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 95 [2023-12-19 20:56:07,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:56:07,957 INFO L225 Difference]: With dead ends: 702 [2023-12-19 20:56:07,957 INFO L226 Difference]: Without dead ends: 627 [2023-12-19 20:56:07,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-12-19 20:56:07,958 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 155 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 20:56:07,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 192 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 20:56:07,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2023-12-19 20:56:08,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 542. [2023-12-19 20:56:08,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 359 states have (on average 1.2813370473537604) internal successors, (460), 385 states have internal predecessors, (460), 130 states have call successors, (130), 52 states have call predecessors, (130), 52 states have return successors, (127), 104 states have call predecessors, (127), 127 states have call successors, (127) [2023-12-19 20:56:08,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 717 transitions. [2023-12-19 20:56:08,078 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 717 transitions. Word has length 95 [2023-12-19 20:56:08,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:56:08,079 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 717 transitions. [2023-12-19 20:56:08,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2023-12-19 20:56:08,079 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 717 transitions. [2023-12-19 20:56:08,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-12-19 20:56:08,080 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:56:08,080 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-19 20:56:08,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-19 20:56:08,284 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,SelfDestructingSolverStorable12 [2023-12-19 20:56:08,284 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:56:08,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:56:08,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1998377320, now seen corresponding path program 2 times [2023-12-19 20:56:08,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:56:08,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557631447] [2023-12-19 20:56:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:56:08,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:56:08,295 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:56:08,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556743505] [2023-12-19 20:56:08,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 20:56:08,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:56:08,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:56:08,304 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:56:08,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-19 20:56:08,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 20:56:08,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 20:56:08,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-19 20:56:08,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:56:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-12-19 20:56:08,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:56:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-12-19 20:56:14,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:56:14,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557631447] [2023-12-19 20:56:14,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:56:14,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556743505] [2023-12-19 20:56:14,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556743505] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:56:14,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:56:14,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2023-12-19 20:56:14,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893278569] [2023-12-19 20:56:14,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:56:14,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-19 20:56:14,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:56:14,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-19 20:56:14,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2023-12-19 20:56:14,220 INFO L87 Difference]: Start difference. First operand 542 states and 717 transitions. Second operand has 27 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2023-12-19 20:56:23,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.33s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:56:27,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:56:35,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:56:38,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 20:56:38,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:56:38,637 INFO L93 Difference]: Finished difference Result 714 states and 963 transitions. [2023-12-19 20:56:38,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-19 20:56:38,638 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) Word has length 100 [2023-12-19 20:56:38,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:56:38,640 INFO L225 Difference]: With dead ends: 714 [2023-12-19 20:56:38,640 INFO L226 Difference]: Without dead ends: 586 [2023-12-19 20:56:38,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=409, Invalid=1231, Unknown=0, NotChecked=0, Total=1640 [2023-12-19 20:56:38,641 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 133 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 139 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2023-12-19 20:56:38,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 457 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 537 Invalid, 3 Unknown, 0 Unchecked, 17.4s Time] [2023-12-19 20:56:38,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2023-12-19 20:56:38,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 517. [2023-12-19 20:56:38,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 342 states have (on average 1.2485380116959064) internal successors, (427), 363 states have internal predecessors, (427), 121 states have call successors, (121), 53 states have call predecessors, (121), 53 states have return successors, (118), 100 states have call predecessors, (118), 118 states have call successors, (118) [2023-12-19 20:56:38,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 666 transitions. [2023-12-19 20:56:38,820 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 666 transitions. Word has length 100 [2023-12-19 20:56:38,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:56:38,820 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 666 transitions. [2023-12-19 20:56:38,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2023-12-19 20:56:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 666 transitions. [2023-12-19 20:56:38,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-19 20:56:38,821 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:56:38,821 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:56:38,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-19 20:56:39,027 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,SelfDestructingSolverStorable13 [2023-12-19 20:56:39,027 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:56:39,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:56:39,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1473599393, now seen corresponding path program 1 times [2023-12-19 20:56:39,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:56:39,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991405160] [2023-12-19 20:56:39,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:56:39,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:56:39,033 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:56:39,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219095127] [2023-12-19 20:56:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:56:39,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:56:39,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:56:39,037 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:56:39,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-19 20:56:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:56:39,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-19 20:56:39,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:56:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-19 20:56:39,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:56:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-12-19 20:56:39,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:56:39,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991405160] [2023-12-19 20:56:39,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:56:39,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219095127] [2023-12-19 20:56:39,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219095127] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:56:39,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:56:39,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2023-12-19 20:56:39,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092526518] [2023-12-19 20:56:39,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:56:39,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 20:56:39,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:56:39,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 20:56:39,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-19 20:56:39,333 INFO L87 Difference]: Start difference. First operand 517 states and 666 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-12-19 20:56:39,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:56:39,674 INFO L93 Difference]: Finished difference Result 639 states and 818 transitions. [2023-12-19 20:56:39,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-19 20:56:39,675 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 103 [2023-12-19 20:56:39,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:56:39,677 INFO L225 Difference]: With dead ends: 639 [2023-12-19 20:56:39,677 INFO L226 Difference]: Without dead ends: 602 [2023-12-19 20:56:39,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 188 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2023-12-19 20:56:39,677 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 98 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 20:56:39,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 187 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 20:56:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2023-12-19 20:56:39,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 594. [2023-12-19 20:56:39,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 398 states have (on average 1.1733668341708543) internal successors, (467), 419 states have internal predecessors, (467), 137 states have call successors, (137), 59 states have call predecessors, (137), 58 states have return successors, (132), 115 states have call predecessors, (132), 132 states have call successors, (132) [2023-12-19 20:56:39,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 736 transitions. [2023-12-19 20:56:39,853 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 736 transitions. Word has length 103 [2023-12-19 20:56:39,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:56:39,853 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 736 transitions. [2023-12-19 20:56:39,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-12-19 20:56:39,853 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 736 transitions. [2023-12-19 20:56:39,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-12-19 20:56:39,854 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:56:39,854 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:56:39,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-19 20:56:40,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-19 20:56:40,059 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:56:40,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:56:40,059 INFO L85 PathProgramCache]: Analyzing trace with hash 102666096, now seen corresponding path program 2 times [2023-12-19 20:56:40,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:56:40,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750034488] [2023-12-19 20:56:40,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:56:40,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:56:40,066 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:56:40,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635048356] [2023-12-19 20:56:40,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 20:56:40,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:56:40,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:56:40,068 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:56:40,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-19 20:56:40,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 20:56:40,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 20:56:40,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-19 20:56:40,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:56:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-12-19 20:56:40,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:56:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-12-19 20:56:41,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:56:41,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750034488] [2023-12-19 20:56:41,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:56:41,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635048356] [2023-12-19 20:56:41,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635048356] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:56:41,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:56:41,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2023-12-19 20:56:41,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123664896] [2023-12-19 20:56:41,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:56:41,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-19 20:56:41,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:56:41,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-19 20:56:41,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-12-19 20:56:41,246 INFO L87 Difference]: Start difference. First operand 594 states and 736 transitions. Second operand has 18 states, 16 states have (on average 3.4375) internal successors, (55), 17 states have internal predecessors, (55), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-12-19 20:56:41,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:56:41,806 INFO L93 Difference]: Finished difference Result 730 states and 894 transitions. [2023-12-19 20:56:41,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 20:56:41,807 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.4375) internal successors, (55), 17 states have internal predecessors, (55), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 105 [2023-12-19 20:56:41,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:56:41,828 INFO L225 Difference]: With dead ends: 730 [2023-12-19 20:56:41,828 INFO L226 Difference]: Without dead ends: 519 [2023-12-19 20:56:41,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2023-12-19 20:56:41,831 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 33 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 20:56:41,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 310 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 20:56:41,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-12-19 20:56:42,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 511. [2023-12-19 20:56:42,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 345 states have (on average 1.153623188405797) internal successors, (398), 363 states have internal predecessors, (398), 116 states have call successors, (116), 50 states have call predecessors, (116), 49 states have return successors, (111), 97 states have call predecessors, (111), 111 states have call successors, (111) [2023-12-19 20:56:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 625 transitions. [2023-12-19 20:56:42,070 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 625 transitions. Word has length 105 [2023-12-19 20:56:42,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:56:42,070 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 625 transitions. [2023-12-19 20:56:42,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.4375) internal successors, (55), 17 states have internal predecessors, (55), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-12-19 20:56:42,070 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 625 transitions. [2023-12-19 20:56:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-12-19 20:56:42,076 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:56:42,076 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:56:42,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-19 20:56:42,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:56:42,281 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:56:42,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:56:42,281 INFO L85 PathProgramCache]: Analyzing trace with hash 518227549, now seen corresponding path program 1 times [2023-12-19 20:56:42,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:56:42,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772300523] [2023-12-19 20:56:42,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:56:42,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:56:42,290 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:56:42,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627533935] [2023-12-19 20:56:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:56:42,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:56:42,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:56:42,291 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:56:42,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-19 20:56:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:56:42,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 20:56:42,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:56:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 72 proven. 16 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-12-19 20:56:42,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:56:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 72 proven. 16 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2023-12-19 20:56:42,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:56:42,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772300523] [2023-12-19 20:56:42,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:56:42,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627533935] [2023-12-19 20:56:42,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627533935] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:56:42,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:56:42,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2023-12-19 20:56:42,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161832001] [2023-12-19 20:56:42,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:56:42,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-19 20:56:42,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:56:42,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-19 20:56:42,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-12-19 20:56:42,548 INFO L87 Difference]: Start difference. First operand 511 states and 625 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-12-19 20:56:42,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:56:42,754 INFO L93 Difference]: Finished difference Result 542 states and 663 transitions. [2023-12-19 20:56:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 20:56:42,755 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 118 [2023-12-19 20:56:42,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:56:42,756 INFO L225 Difference]: With dead ends: 542 [2023-12-19 20:56:42,756 INFO L226 Difference]: Without dead ends: 522 [2023-12-19 20:56:42,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 224 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-12-19 20:56:42,757 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 20 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 20:56:42,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 89 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 20:56:42,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2023-12-19 20:56:42,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 477. [2023-12-19 20:56:42,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 324 states have (on average 1.1450617283950617) internal successors, (371), 339 states have internal predecessors, (371), 103 states have call successors, (103), 49 states have call predecessors, (103), 49 states have return successors, (99), 88 states have call predecessors, (99), 99 states have call successors, (99) [2023-12-19 20:56:42,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 573 transitions. [2023-12-19 20:56:42,908 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 573 transitions. Word has length 118 [2023-12-19 20:56:42,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:56:42,908 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 573 transitions. [2023-12-19 20:56:42,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2023-12-19 20:56:42,909 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 573 transitions. [2023-12-19 20:56:42,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-12-19 20:56:42,909 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:56:42,909 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2023-12-19 20:56:42,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-19 20:56:43,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-19 20:56:43,114 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:56:43,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:56:43,115 INFO L85 PathProgramCache]: Analyzing trace with hash 236832332, now seen corresponding path program 3 times [2023-12-19 20:56:43,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:56:43,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338655084] [2023-12-19 20:56:43,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:56:43,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:56:43,120 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:56:43,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326990578] [2023-12-19 20:56:43,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 20:56:43,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:56:43,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:56:43,121 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:56:43,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-19 20:56:43,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-19 20:56:43,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 20:56:43,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-19 20:56:43,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:56:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 159 proven. 47 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2023-12-19 20:56:43,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:56:45,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:56:45,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338655084] [2023-12-19 20:56:45,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:56:45,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326990578] [2023-12-19 20:56:45,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326990578] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 20:56:45,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 20:56:45,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-12-19 20:56:45,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558095417] [2023-12-19 20:56:45,081 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 20:56:45,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 20:56:45,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:56:45,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 20:56:45,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-12-19 20:56:45,082 INFO L87 Difference]: Start difference. First operand 477 states and 573 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-19 20:56:45,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:56:45,320 INFO L93 Difference]: Finished difference Result 492 states and 587 transitions. [2023-12-19 20:56:45,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 20:56:45,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2023-12-19 20:56:45,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:56:45,321 INFO L225 Difference]: With dead ends: 492 [2023-12-19 20:56:45,322 INFO L226 Difference]: Without dead ends: 486 [2023-12-19 20:56:45,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-12-19 20:56:45,322 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 20:56:45,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 74 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 20:56:45,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2023-12-19 20:56:45,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 482. [2023-12-19 20:56:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 329 states have (on average 1.1367781155015197) internal successors, (374), 342 states have internal predecessors, (374), 102 states have call successors, (102), 51 states have call predecessors, (102), 50 states have return successors, (99), 88 states have call predecessors, (99), 99 states have call successors, (99) [2023-12-19 20:56:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 575 transitions. [2023-12-19 20:56:45,470 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 575 transitions. Word has length 121 [2023-12-19 20:56:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:56:45,471 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 575 transitions. [2023-12-19 20:56:45,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-19 20:56:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 575 transitions. [2023-12-19 20:56:45,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-12-19 20:56:45,472 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:56:45,472 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-12-19 20:56:45,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-19 20:56:45,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-19 20:56:45,677 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:56:45,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:56:45,677 INFO L85 PathProgramCache]: Analyzing trace with hash -644102317, now seen corresponding path program 3 times [2023-12-19 20:56:45,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:56:45,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070095577] [2023-12-19 20:56:45,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:56:45,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:56:45,683 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:56:45,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041394640] [2023-12-19 20:56:45,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 20:56:45,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:56:45,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:56:45,700 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:56:45,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-19 20:56:45,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-19 20:56:45,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 20:56:45,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-19 20:56:45,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:56:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 163 proven. 56 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2023-12-19 20:56:45,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:56:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-12-19 20:56:46,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:56:46,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070095577] [2023-12-19 20:56:46,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:56:46,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041394640] [2023-12-19 20:56:46,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041394640] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:56:46,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:56:46,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-12-19 20:56:46,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190781145] [2023-12-19 20:56:46,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:56:46,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-19 20:56:46,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:56:46,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-19 20:56:46,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-12-19 20:56:46,019 INFO L87 Difference]: Start difference. First operand 482 states and 575 transitions. Second operand has 16 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-12-19 20:56:46,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:56:46,382 INFO L93 Difference]: Finished difference Result 489 states and 581 transitions. [2023-12-19 20:56:46,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-19 20:56:46,382 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 132 [2023-12-19 20:56:46,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:56:46,386 INFO L225 Difference]: With dead ends: 489 [2023-12-19 20:56:46,386 INFO L226 Difference]: Without dead ends: 479 [2023-12-19 20:56:46,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2023-12-19 20:56:46,387 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 20:56:46,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 134 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 20:56:46,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-12-19 20:56:46,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 346. [2023-12-19 20:56:46,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 233 states have (on average 1.1030042918454936) internal successors, (257), 244 states have internal predecessors, (257), 69 states have call successors, (69), 43 states have call predecessors, (69), 43 states have return successors, (68), 58 states have call predecessors, (68), 68 states have call successors, (68) [2023-12-19 20:56:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 394 transitions. [2023-12-19 20:56:46,523 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 394 transitions. Word has length 132 [2023-12-19 20:56:46,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:56:46,523 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 394 transitions. [2023-12-19 20:56:46,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-12-19 20:56:46,523 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 394 transitions. [2023-12-19 20:56:46,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-12-19 20:56:46,524 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:56:46,524 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2023-12-19 20:56:46,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-19 20:56:46,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:56:46,729 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:56:46,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:56:46,729 INFO L85 PathProgramCache]: Analyzing trace with hash 23446698, now seen corresponding path program 1 times [2023-12-19 20:56:46,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:56:46,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670375228] [2023-12-19 20:56:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:56:46,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:56:46,747 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:56:46,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569517214] [2023-12-19 20:56:46,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:56:46,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:56:46,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:56:46,758 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:56:46,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-19 20:56:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 20:56:46,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-19 20:56:46,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:56:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 417 proven. 69 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2023-12-19 20:56:47,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:56:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 105 proven. 69 refuted. 0 times theorem prover too weak. 1116 trivial. 0 not checked. [2023-12-19 20:56:48,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:56:48,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670375228] [2023-12-19 20:56:48,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:56:48,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569517214] [2023-12-19 20:56:48,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569517214] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 20:56:48,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 20:56:48,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2023-12-19 20:56:48,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671295153] [2023-12-19 20:56:48,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 20:56:48,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-19 20:56:48,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:56:48,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-19 20:56:48,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2023-12-19 20:56:48,798 INFO L87 Difference]: Start difference. First operand 346 states and 394 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 16 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 16 states have call predecessors, (42), 16 states have call successors, (42) [2023-12-19 20:56:49,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:56:49,394 INFO L93 Difference]: Finished difference Result 454 states and 537 transitions. [2023-12-19 20:56:49,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-19 20:56:49,394 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 16 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 16 states have call predecessors, (42), 16 states have call successors, (42) Word has length 163 [2023-12-19 20:56:49,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:56:49,395 INFO L225 Difference]: With dead ends: 454 [2023-12-19 20:56:49,395 INFO L226 Difference]: Without dead ends: 333 [2023-12-19 20:56:49,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2023-12-19 20:56:49,396 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 19 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 20:56:49,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 853 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 20:56:49,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-12-19 20:56:49,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 319. [2023-12-19 20:56:49,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 215 states have (on average 1.0976744186046512) internal successors, (236), 224 states have internal predecessors, (236), 62 states have call successors, (62), 41 states have call predecessors, (62), 41 states have return successors, (61), 53 states have call predecessors, (61), 61 states have call successors, (61) [2023-12-19 20:56:49,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 359 transitions. [2023-12-19 20:56:49,520 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 359 transitions. Word has length 163 [2023-12-19 20:56:49,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:56:49,520 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 359 transitions. [2023-12-19 20:56:49,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 16 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 16 states have call predecessors, (42), 16 states have call successors, (42) [2023-12-19 20:56:49,520 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 359 transitions. [2023-12-19 20:56:49,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-12-19 20:56:49,521 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:56:49,521 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2023-12-19 20:56:49,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-19 20:56:49,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:56:49,726 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:56:49,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:56:49,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1286193017, now seen corresponding path program 2 times [2023-12-19 20:56:49,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:56:49,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338191374] [2023-12-19 20:56:49,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:56:49,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:56:49,736 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:56:49,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560627712] [2023-12-19 20:56:49,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 20:56:49,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:56:49,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:56:49,737 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:56:49,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-19 20:56:49,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 20:56:49,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 20:56:49,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-19 20:56:49,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 20:56:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 64 proven. 116 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-12-19 20:56:50,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 20:57:04,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 20:57:04,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338191374] [2023-12-19 20:57:04,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 20:57:04,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560627712] [2023-12-19 20:57:04,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560627712] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 20:57:04,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 20:57:04,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-12-19 20:57:04,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547228770] [2023-12-19 20:57:04,412 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 20:57:04,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-19 20:57:04,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 20:57:04,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-19 20:57:04,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=424, Unknown=2, NotChecked=0, Total=506 [2023-12-19 20:57:04,413 INFO L87 Difference]: Start difference. First operand 319 states and 359 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 11 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 10 states have call predecessors, (25), 10 states have call successors, (25) [2023-12-19 20:57:04,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 20:57:04,868 INFO L93 Difference]: Finished difference Result 397 states and 464 transitions. [2023-12-19 20:57:04,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-19 20:57:04,869 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 11 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 10 states have call predecessors, (25), 10 states have call successors, (25) Word has length 167 [2023-12-19 20:57:04,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 20:57:04,870 INFO L225 Difference]: With dead ends: 397 [2023-12-19 20:57:04,870 INFO L226 Difference]: Without dead ends: 292 [2023-12-19 20:57:04,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=135, Invalid=733, Unknown=2, NotChecked=0, Total=870 [2023-12-19 20:57:04,873 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 20 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 20:57:04,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 707 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 20:57:04,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-12-19 20:57:04,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2023-12-19 20:57:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 197 states have (on average 1.0913705583756346) internal successors, (215), 204 states have internal predecessors, (215), 55 states have call successors, (55), 39 states have call predecessors, (55), 39 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2023-12-19 20:57:04,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 324 transitions. [2023-12-19 20:57:04,982 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 324 transitions. Word has length 167 [2023-12-19 20:57:04,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 20:57:04,982 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 324 transitions. [2023-12-19 20:57:04,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 11 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 10 states have call predecessors, (25), 10 states have call successors, (25) [2023-12-19 20:57:04,983 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 324 transitions. [2023-12-19 20:57:04,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-12-19 20:57:04,984 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 20:57:04,984 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-12-19 20:57:05,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-19 20:57:05,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:57:05,190 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 20:57:05,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 20:57:05,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1311233700, now seen corresponding path program 3 times [2023-12-19 20:57:05,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 20:57:05,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773140772] [2023-12-19 20:57:05,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 20:57:05,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 20:57:05,196 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 20:57:05,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547263588] [2023-12-19 20:57:05,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 20:57:05,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 20:57:05,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 20:57:05,203 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 20:57:05,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-19 20:57:05,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-12-19 20:57:05,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-12-19 20:57:05,309 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-19 20:57:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-19 20:57:05,423 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-19 20:57:05,423 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-19 20:57:05,423 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 20:57:05,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-19 20:57:05,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-19 20:57:05,651 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 20:57:05,653 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 20:57:05,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 08:57:05 BoogieIcfgContainer [2023-12-19 20:57:05,696 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 20:57:05,696 INFO L158 Benchmark]: Toolchain (without parser) took 225034.46ms. Allocated memory was 194.0MB in the beginning and 380.6MB in the end (delta: 186.6MB). Free memory was 146.9MB in the beginning and 183.8MB in the end (delta: -36.8MB). Peak memory consumption was 150.2MB. Max. memory is 8.0GB. [2023-12-19 20:57:05,699 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 194.0MB. Free memory is still 149.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 20:57:05,699 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.45ms. Allocated memory is still 194.0MB. Free memory was 146.9MB in the beginning and 135.8MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-19 20:57:05,699 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.31ms. Allocated memory is still 194.0MB. Free memory was 135.8MB in the beginning and 134.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 20:57:05,699 INFO L158 Benchmark]: Boogie Preprocessor took 57.14ms. Allocated memory is still 194.0MB. Free memory was 134.0MB in the beginning and 132.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 20:57:05,699 INFO L158 Benchmark]: RCFGBuilder took 312.56ms. Allocated memory is still 194.0MB. Free memory was 132.3MB in the beginning and 120.4MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-19 20:57:05,699 INFO L158 Benchmark]: TraceAbstraction took 224395.23ms. Allocated memory was 194.0MB in the beginning and 380.6MB in the end (delta: 186.6MB). Free memory was 119.7MB in the beginning and 183.8MB in the end (delta: -64.1MB). Peak memory consumption was 122.9MB. Max. memory is 8.0GB. [2023-12-19 20:57:05,700 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 194.0MB. Free memory is still 149.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 228.45ms. Allocated memory is still 194.0MB. Free memory was 146.9MB in the beginning and 135.8MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 37.31ms. Allocated memory is still 194.0MB. Free memory was 135.8MB in the beginning and 134.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 57.14ms. Allocated memory is still 194.0MB. Free memory was 134.0MB in the beginning and 132.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 312.56ms. Allocated memory is still 194.0MB. Free memory was 132.3MB in the beginning and 120.4MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 224395.23ms. Allocated memory was 194.0MB in the beginning and 380.6MB in the end (delta: 186.6MB). Free memory was 119.7MB in the beginning and 183.8MB in the end (delta: -64.1MB). Peak memory consumption was 122.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [A=30, B=1, counter=0, d=1, p=1, q=0, r=30] [L34] EXPR counter++ VAL [A=30, B=1, counter=1, d=1, p=1, q=0, r=30] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [A=30, B=1, counter=1, d=1, p=1, q=0, r=30] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [A=30, B=1, counter=1, d=1, p=1, q=0, r=30] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=30, B=1, counter=1, d=1, p=1, q=0, r=30] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=30, B=1, counter=1, d=2, p=2, q=0, r=30] [L34] EXPR counter++ VAL [A=30, B=1, counter=2, d=2, p=2, q=0, r=30] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(q == 0) VAL [A=30, B=1, counter=2, d=2, p=2, q=0, r=30] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(r == A) VAL [A=30, B=1, counter=2, d=2, p=2, q=0, r=30] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=30, B=1, counter=2, d=2, p=2, q=0, r=30] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=30, B=1, counter=2, d=4, p=4, q=0, r=30] [L34] EXPR counter++ VAL [A=30, B=1, counter=3, d=4, p=4, q=0, r=30] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L35] RET __VERIFIER_assert(q == 0) VAL [A=30, B=1, counter=3, d=4, p=4, q=0, r=30] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L36] RET __VERIFIER_assert(r == A) VAL [A=30, B=1, counter=3, d=4, p=4, q=0, r=30] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=30, B=1, counter=3, d=4, p=4, q=0, r=30] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=30, B=1, counter=3, d=8, p=8, q=0, r=30] [L34] EXPR counter++ VAL [A=30, B=1, counter=4, d=8, p=8, q=0, r=30] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L35] RET __VERIFIER_assert(q == 0) VAL [A=30, B=1, counter=4, d=8, p=8, q=0, r=30] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L36] RET __VERIFIER_assert(r == A) VAL [A=30, B=1, counter=4, d=8, p=8, q=0, r=30] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=30, B=1, counter=4, d=8, p=8, q=0, r=30] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=30, B=1, counter=4, d=16, p=16, q=0, r=30] [L34] EXPR counter++ VAL [A=30, B=1, counter=5, d=16, p=16, q=0, r=30] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(q == 0) VAL [A=30, B=1, counter=5, d=16, p=16, q=0, r=30] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L36] RET __VERIFIER_assert(r == A) VAL [A=30, B=1, counter=5, d=16, p=16, q=0, r=30] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=30, B=1, counter=5, d=16, p=16, q=0, r=30] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=30, B=1, counter=5, d=32, p=32, q=0, r=30] [L34] EXPR counter++ VAL [A=30, B=1, counter=6, d=32, p=32, q=0, r=30] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L35] RET __VERIFIER_assert(q == 0) VAL [A=30, B=1, counter=6, d=32, p=32, q=0, r=30] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L36] RET __VERIFIER_assert(r == A) VAL [A=30, B=1, counter=6, d=32, p=32, q=0, r=30] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=30, B=1, counter=6, d=32, p=32, q=0, r=30] [L38] COND TRUE !(r >= d) VAL [A=30, B=1, counter=6, d=32, p=32, q=0, r=30] [L44] EXPR counter++ VAL [A=30, B=1, counter=7, d=32, p=32, q=0, r=30] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=30, B=1, counter=7, d=32, p=32, q=0, r=30] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=30, B=1, counter=7, d=32, p=32, q=0, r=30] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [A=30, B=1, counter=7, d=16, p=16, q=0, r=30] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [A=30, B=1, counter=7, d=16, p=16, q=16, r=14] [L44] EXPR counter++ VAL [A=30, B=1, counter=8, d=16, p=16, q=16, r=14] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=30, B=1, counter=8, d=16, p=16, q=16, r=14] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=30, B=1, counter=8, d=16, p=16, q=16, r=14] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [A=30, B=1, counter=8, d=8, p=8, q=16, r=14] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [A=30, B=1, counter=8, d=8, p=8, q=24, r=6] [L44] EXPR counter++ VAL [A=30, B=1, counter=9, d=8, p=8, q=24, r=6] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=30, B=1, counter=9, d=8, p=8, q=24, r=6] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=30, B=1, counter=9, d=8, p=8, q=24, r=6] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [A=30, B=1, counter=9, d=4, p=4, q=24, r=6] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [A=30, B=1, counter=9, d=4, p=4, q=28, r=2] [L44] EXPR counter++ VAL [A=30, B=1, counter=10, d=4, p=4, q=28, r=2] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=30, B=1, counter=10, d=4, p=4, q=28, r=2] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=30, B=1, counter=10, d=4, p=4, q=28, r=2] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [A=30, B=1, counter=10, d=2, p=2, q=28, r=2] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [A=30, B=1, counter=10, d=2, p=2, q=30, r=0] [L44] EXPR counter++ VAL [A=30, B=1, counter=11, d=2, p=2, q=30, r=0] [L44] COND FALSE !(counter++<10) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=0, counter=11] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L17] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 224.3s, OverallIterations: 22, TraceHistogramMax: 27, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 161.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 mSolverCounterUnknown, 1065 SdHoareTripleChecker+Valid, 66.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1001 mSDsluCounter, 5163 SdHoareTripleChecker+Invalid, 66.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4434 mSDsCounter, 667 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4144 IncrementalHoareTripleChecker+Invalid, 4820 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 667 mSolverCounterUnsat, 729 mSDtfsCounter, 4144 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2881 GetRequests, 2547 SyntacticMatches, 11 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 113.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=594occurred in iteration=15, InterpolantAutomatonStates: 254, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 21 MinimizatonAttempts, 471 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 55.3s InterpolantComputationTime, 1735 NumberOfCodeBlocks, 1617 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 2737 ConstructedInterpolants, 0 QuantifiedInterpolants, 28717 SizeOfPredicates, 66 NumberOfNonLiveVariables, 3915 ConjunctsInSsa, 451 ConjunctsInUnsatCore, 36 InterpolantComputations, 4 PerfectInterpolantSequences, 12180/13997 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-12-19 20:57:05,813 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 0 Received shutdown request...