/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/loops-crafted-1/nested3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 04:53:31,849 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 04:53:31,918 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-16 04:53:31,923 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 04:53:31,923 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 04:53:31,945 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 04:53:31,945 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 04:53:31,945 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 04:53:31,946 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 04:53:31,949 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 04:53:31,949 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 04:53:31,949 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 04:53:31,950 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 04:53:31,951 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 04:53:31,951 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 04:53:31,951 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 04:53:31,951 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 04:53:31,951 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 04:53:31,951 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-16 04:53:31,952 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 04:53:31,952 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 04:53:31,952 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 04:53:31,952 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 04:53:31,952 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 04:53:31,952 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 04:53:31,953 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 04:53:31,953 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 04:53:31,953 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 04:53:31,953 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 04:53:31,953 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 04:53:31,954 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 04:53:31,954 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 04:53:31,954 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 04:53:31,954 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 04:53:31,955 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 04:53:31,955 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 04:53:31,955 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-16 04:53:31,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-16 04:53:31,955 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 04:53:31,955 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 04:53:31,955 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 04:53:31,955 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 04:53:31,955 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 04:53:31,956 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-16 04:53:32,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 04:53:32,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 04:53:32,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 04:53:32,157 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 04:53:32,158 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 04:53:32,158 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2023-12-16 04:53:33,065 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 04:53:33,225 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 04:53:33,226 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2023-12-16 04:53:33,232 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0795c9d0a/6e751b9286694fffbf0b8d887acb34e8/FLAG15bddcd38 [2023-12-16 04:53:33,245 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0795c9d0a/6e751b9286694fffbf0b8d887acb34e8 [2023-12-16 04:53:33,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 04:53:33,247 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 04:53:33,249 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 04:53:33,249 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 04:53:33,253 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 04:53:33,253 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 04:53:33" (1/1) ... [2023-12-16 04:53:33,253 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@706468 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:53:33, skipping insertion in model container [2023-12-16 04:53:33,254 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 04:53:33" (1/1) ... [2023-12-16 04:53:33,271 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 04:53:33,369 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c[321,334] [2023-12-16 04:53:33,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 04:53:33,391 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 04:53:33,399 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c[321,334] [2023-12-16 04:53:33,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 04:53:33,411 INFO L206 MainTranslator]: Completed translation [2023-12-16 04:53:33,412 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:53:33 WrapperNode [2023-12-16 04:53:33,412 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 04:53:33,414 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 04:53:33,414 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 04:53:33,414 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 04:53:33,419 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:53:33" (1/1) ... [2023-12-16 04:53:33,431 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:53:33" (1/1) ... [2023-12-16 04:53:33,447 INFO L138 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2023-12-16 04:53:33,450 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 04:53:33,450 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 04:53:33,450 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 04:53:33,451 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 04:53:33,457 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:53:33" (1/1) ... [2023-12-16 04:53:33,457 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:53:33" (1/1) ... [2023-12-16 04:53:33,458 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:53:33" (1/1) ... [2023-12-16 04:53:33,472 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-16 04:53:33,472 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:53:33" (1/1) ... [2023-12-16 04:53:33,472 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:53:33" (1/1) ... [2023-12-16 04:53:33,474 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:53:33" (1/1) ... [2023-12-16 04:53:33,476 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:53:33" (1/1) ... [2023-12-16 04:53:33,476 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:53:33" (1/1) ... [2023-12-16 04:53:33,477 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:53:33" (1/1) ... [2023-12-16 04:53:33,478 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 04:53:33,479 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 04:53:33,479 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 04:53:33,479 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 04:53:33,480 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:53:33" (1/1) ... [2023-12-16 04:53:33,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 04:53:33,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 04:53:33,565 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) [2023-12-16 04:53:33,571 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 [2023-12-16 04:53:33,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 04:53:33,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 04:53:33,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 04:53:33,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-16 04:53:33,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-16 04:53:33,585 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-16 04:53:33,626 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 04:53:33,628 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 04:53:33,745 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 04:53:33,758 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 04:53:33,759 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-16 04:53:33,759 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 04:53:33 BoogieIcfgContainer [2023-12-16 04:53:33,759 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 04:53:33,760 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 04:53:33,761 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 04:53:33,763 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 04:53:33,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 04:53:33" (1/3) ... [2023-12-16 04:53:33,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34352f54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 04:53:33, skipping insertion in model container [2023-12-16 04:53:33,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:53:33" (2/3) ... [2023-12-16 04:53:33,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34352f54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 04:53:33, skipping insertion in model container [2023-12-16 04:53:33,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 04:53:33" (3/3) ... [2023-12-16 04:53:33,764 INFO L112 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2023-12-16 04:53:33,775 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 04:53:33,775 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-16 04:53:33,801 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 04:53:33,805 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;@5775ba36, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 04:53:33,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-16 04:53:33,808 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 04:53:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-16 04:53:33,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:53:33,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-16 04:53:33,812 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:53:33,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:53:33,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1507703365, now seen corresponding path program 1 times [2023-12-16 04:53:33,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:53:33,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244970102] [2023-12-16 04:53:33,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:53:33,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:53:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 04:53:33,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:53:33,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244970102] [2023-12-16 04:53:33,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244970102] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 04:53:33,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 04:53:33,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-16 04:53:33,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901294738] [2023-12-16 04:53:33,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 04:53:33,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 04:53:33,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 04:53:33,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 04:53:33,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 04:53:33,982 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-12-16 04:53:34,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 04:53:34,010 INFO L93 Difference]: Finished difference Result 40 states and 69 transitions. [2023-12-16 04:53:34,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 04:53:34,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 6 [2023-12-16 04:53:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 04:53:34,016 INFO L225 Difference]: With dead ends: 40 [2023-12-16 04:53:34,016 INFO L226 Difference]: Without dead ends: 22 [2023-12-16 04:53:34,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 04:53:34,021 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 04:53:34,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 33 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 04:53:34,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-16 04:53:34,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2023-12-16 04:53:34,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 04:53:34,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-12-16 04:53:34,060 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 6 [2023-12-16 04:53:34,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 04:53:34,060 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-12-16 04:53:34,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-12-16 04:53:34,060 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-12-16 04:53:34,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-16 04:53:34,061 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:53:34,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-16 04:53:34,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-16 04:53:34,061 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:53:34,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:53:34,062 INFO L85 PathProgramCache]: Analyzing trace with hash 521920189, now seen corresponding path program 1 times [2023-12-16 04:53:34,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:53:34,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208112454] [2023-12-16 04:53:34,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:53:34,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:53:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 04:53:34,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:53:34,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208112454] [2023-12-16 04:53:34,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208112454] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 04:53:34,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 04:53:34,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 04:53:34,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657746681] [2023-12-16 04:53:34,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 04:53:34,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 04:53:34,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 04:53:34,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 04:53:34,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 04:53:34,123 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 2.0) 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) [2023-12-16 04:53:34,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 04:53:34,141 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2023-12-16 04:53:34,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 04:53:34,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) 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 [2023-12-16 04:53:34,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 04:53:34,142 INFO L225 Difference]: With dead ends: 34 [2023-12-16 04:53:34,142 INFO L226 Difference]: Without dead ends: 20 [2023-12-16 04:53:34,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 04:53:34,144 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 04:53:34,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 04:53:34,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-16 04:53:34,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2023-12-16 04:53:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 04:53:34,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-12-16 04:53:34,148 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 7 [2023-12-16 04:53:34,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 04:53:34,148 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-12-16 04:53:34,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) 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) [2023-12-16 04:53:34,148 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-12-16 04:53:34,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-16 04:53:34,149 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:53:34,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 04:53:34,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-16 04:53:34,149 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:53:34,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:53:34,150 INFO L85 PathProgramCache]: Analyzing trace with hash -974159928, now seen corresponding path program 1 times [2023-12-16 04:53:34,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:53:34,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021462184] [2023-12-16 04:53:34,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:53:34,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:53:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 04:53:34,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:53:34,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021462184] [2023-12-16 04:53:34,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021462184] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 04:53:34,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 04:53:34,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 04:53:34,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464737111] [2023-12-16 04:53:34,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 04:53:34,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 04:53:34,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 04:53:34,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 04:53:34,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 04:53:34,201 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-12-16 04:53:34,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 04:53:34,209 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-12-16 04:53:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 04:53:34,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2023-12-16 04:53:34,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 04:53:34,210 INFO L225 Difference]: With dead ends: 34 [2023-12-16 04:53:34,210 INFO L226 Difference]: Without dead ends: 19 [2023-12-16 04:53:34,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 04:53:34,211 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 04:53:34,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 04:53:34,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-16 04:53:34,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2023-12-16 04:53:34,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 04:53:34,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-12-16 04:53:34,215 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 8 [2023-12-16 04:53:34,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 04:53:34,215 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-12-16 04:53:34,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-12-16 04:53:34,215 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-12-16 04:53:34,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-16 04:53:34,215 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:53:34,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 04:53:34,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-16 04:53:34,216 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:53:34,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:53:34,216 INFO L85 PathProgramCache]: Analyzing trace with hash -106156257, now seen corresponding path program 1 times [2023-12-16 04:53:34,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:53:34,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122921875] [2023-12-16 04:53:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:53:34,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:53:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 04:53:34,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:53:34,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122921875] [2023-12-16 04:53:34,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122921875] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 04:53:34,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979844618] [2023-12-16 04:53:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:53:34,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:53:34,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 04:53:34,306 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) [2023-12-16 04:53:34,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-16 04:53:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:34,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-16 04:53:34,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 04:53:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 04:53:34,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 04:53:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 04:53:34,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979844618] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 04:53:34,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 04:53:34,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-16 04:53:34,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003386808] [2023-12-16 04:53:34,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 04:53:34,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-16 04:53:34,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 04:53:34,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-16 04:53:34,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-12-16 04:53:34,397 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2023-12-16 04:53:34,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 04:53:34,423 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2023-12-16 04:53:34,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-16 04:53:34,424 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 [2023-12-16 04:53:34,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 04:53:34,424 INFO L225 Difference]: With dead ends: 38 [2023-12-16 04:53:34,424 INFO L226 Difference]: Without dead ends: 22 [2023-12-16 04:53:34,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-12-16 04:53:34,426 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 04:53:34,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 48 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 04:53:34,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-16 04:53:34,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2023-12-16 04:53:34,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 04:53:34,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-12-16 04:53:34,430 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 9 [2023-12-16 04:53:34,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 04:53:34,430 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-12-16 04:53:34,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2023-12-16 04:53:34,431 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-12-16 04:53:34,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-16 04:53:34,431 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:53:34,431 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 04:53:34,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-16 04:53:34,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:53:34,637 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:53:34,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:53:34,638 INFO L85 PathProgramCache]: Analyzing trace with hash 659299720, now seen corresponding path program 2 times [2023-12-16 04:53:34,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:53:34,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942824734] [2023-12-16 04:53:34,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:53:34,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:53:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 04:53:34,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:53:34,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942824734] [2023-12-16 04:53:34,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942824734] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 04:53:34,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885196612] [2023-12-16 04:53:34,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 04:53:34,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:53:34,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 04:53:34,720 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) [2023-12-16 04:53:34,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-16 04:53:34,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 04:53:34,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 04:53:34,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-16 04:53:34,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 04:53:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 04:53:34,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 04:53:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 04:53:34,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885196612] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 04:53:34,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 04:53:34,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-12-16 04:53:34,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903083313] [2023-12-16 04:53:34,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 04:53:34,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-16 04:53:34,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 04:53:34,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-16 04:53:34,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-12-16 04:53:34,837 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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) [2023-12-16 04:53:35,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 04:53:35,000 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2023-12-16 04:53:35,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-16 04:53:35,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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 12 [2023-12-16 04:53:35,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 04:53:35,001 INFO L225 Difference]: With dead ends: 47 [2023-12-16 04:53:35,001 INFO L226 Difference]: Without dead ends: 28 [2023-12-16 04:53:35,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2023-12-16 04:53:35,002 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 04:53:35,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 138 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 04:53:35,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-16 04:53:35,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-12-16 04:53:35,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 04:53:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-12-16 04:53:35,007 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 12 [2023-12-16 04:53:35,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 04:53:35,007 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-12-16 04:53:35,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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) [2023-12-16 04:53:35,007 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-12-16 04:53:35,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-16 04:53:35,008 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:53:35,008 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 04:53:35,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-16 04:53:35,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:53:35,213 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:53:35,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:53:35,213 INFO L85 PathProgramCache]: Analyzing trace with hash -2054101464, now seen corresponding path program 3 times [2023-12-16 04:53:35,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:53:35,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081573098] [2023-12-16 04:53:35,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:53:35,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:53:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 04:53:35,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:53:35,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081573098] [2023-12-16 04:53:35,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081573098] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 04:53:35,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094375790] [2023-12-16 04:53:35,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 04:53:35,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:53:35,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 04:53:35,451 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) [2023-12-16 04:53:35,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-16 04:53:35,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-16 04:53:35,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 04:53:35,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-16 04:53:35,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 04:53:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-16 04:53:35,671 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 04:53:35,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094375790] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 04:53:35,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-16 04:53:35,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2023-12-16 04:53:35,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904650378] [2023-12-16 04:53:35,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 04:53:35,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-16 04:53:35,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 04:53:35,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-16 04:53:35,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-12-16 04:53:35,672 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2023-12-16 04:53:35,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 04:53:35,763 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2023-12-16 04:53:35,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-16 04:53:35,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 18 [2023-12-16 04:53:35,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 04:53:35,764 INFO L225 Difference]: With dead ends: 34 [2023-12-16 04:53:35,764 INFO L226 Difference]: Without dead ends: 32 [2023-12-16 04:53:35,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-12-16 04:53:35,765 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 04:53:35,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 59 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 04:53:35,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-16 04:53:35,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2023-12-16 04:53:35,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 04:53:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-12-16 04:53:35,770 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 18 [2023-12-16 04:53:35,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 04:53:35,770 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-12-16 04:53:35,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2023-12-16 04:53:35,771 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-12-16 04:53:35,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-16 04:53:35,771 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:53:35,771 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 04:53:35,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-16 04:53:35,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:53:35,976 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:53:35,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:53:35,976 INFO L85 PathProgramCache]: Analyzing trace with hash 801123545, now seen corresponding path program 1 times [2023-12-16 04:53:35,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:53:35,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119628408] [2023-12-16 04:53:35,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:53:35,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:53:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:36,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-12-16 04:53:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 04:53:36,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:53:36,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119628408] [2023-12-16 04:53:36,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119628408] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 04:53:36,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057868156] [2023-12-16 04:53:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:53:36,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:53:36,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 04:53:36,116 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) [2023-12-16 04:53:36,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-16 04:53:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:36,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-16 04:53:36,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 04:53:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-16 04:53:36,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 04:53:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-16 04:53:36,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057868156] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 04:53:36,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 04:53:36,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2023-12-16 04:53:36,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085956995] [2023-12-16 04:53:36,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 04:53:36,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-16 04:53:36,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 04:53:36,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-16 04:53:36,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-12-16 04:53:36,323 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 04:53:36,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 04:53:36,933 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2023-12-16 04:53:36,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-12-16 04:53:36,934 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2023-12-16 04:53:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 04:53:36,935 INFO L225 Difference]: With dead ends: 107 [2023-12-16 04:53:36,935 INFO L226 Difference]: Without dead ends: 78 [2023-12-16 04:53:36,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=618, Invalid=3542, Unknown=0, NotChecked=0, Total=4160 [2023-12-16 04:53:36,937 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 61 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 04:53:36,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 169 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 04:53:36,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-16 04:53:36,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2023-12-16 04:53:36,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 69 states have internal predecessors, (75), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-16 04:53:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2023-12-16 04:53:36,972 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 25 [2023-12-16 04:53:36,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 04:53:36,972 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2023-12-16 04:53:36,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-16 04:53:36,973 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2023-12-16 04:53:36,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-16 04:53:36,974 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:53:36,974 INFO L195 NwaCegarLoop]: trace histogram [44, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-12-16 04:53:36,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-16 04:53:37,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:53:37,175 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:53:37,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:53:37,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1160278403, now seen corresponding path program 2 times [2023-12-16 04:53:37,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:53:37,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706681074] [2023-12-16 04:53:37,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:53:37,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:53:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:37,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-16 04:53:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:37,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-12-16 04:53:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:37,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-12-16 04:53:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:37,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-12-16 04:53:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 444 proven. 66 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2023-12-16 04:53:37,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:53:37,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706681074] [2023-12-16 04:53:37,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706681074] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 04:53:37,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34247395] [2023-12-16 04:53:37,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 04:53:37,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:53:37,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 04:53:37,443 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) [2023-12-16 04:53:37,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-16 04:53:37,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 04:53:37,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 04:53:37,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-16 04:53:37,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 04:53:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 8 proven. 931 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-12-16 04:53:37,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 04:53:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 43 proven. 896 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-12-16 04:53:38,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34247395] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 04:53:38,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 04:53:38,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2023-12-16 04:53:38,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743382304] [2023-12-16 04:53:38,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 04:53:38,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-16 04:53:38,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 04:53:38,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-16 04:53:38,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2023-12-16 04:53:38,044 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-16 04:53:43,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 04:53:43,590 INFO L93 Difference]: Finished difference Result 253 states and 299 transitions. [2023-12-16 04:53:43,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2023-12-16 04:53:43,592 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 83 [2023-12-16 04:53:43,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 04:53:43,593 INFO L225 Difference]: With dead ends: 253 [2023-12-16 04:53:43,593 INFO L226 Difference]: Without dead ends: 178 [2023-12-16 04:53:43,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8825 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3165, Invalid=21327, Unknown=0, NotChecked=0, Total=24492 [2023-12-16 04:53:43,600 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 115 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-16 04:53:43,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 232 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-16 04:53:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-12-16 04:53:43,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2023-12-16 04:53:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 162 states have (on average 1.0802469135802468) internal successors, (175), 163 states have internal predecessors, (175), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-16 04:53:43,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 198 transitions. [2023-12-16 04:53:43,639 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 198 transitions. Word has length 83 [2023-12-16 04:53:43,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 04:53:43,639 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 198 transitions. [2023-12-16 04:53:43,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-16 04:53:43,639 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 198 transitions. [2023-12-16 04:53:43,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-12-16 04:53:43,647 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:53:43,647 INFO L195 NwaCegarLoop]: trace histogram [120, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-12-16 04:53:43,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-16 04:53:43,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:53:43,855 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:53:43,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:53:43,855 INFO L85 PathProgramCache]: Analyzing trace with hash -227501803, now seen corresponding path program 3 times [2023-12-16 04:53:43,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:53:43,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420794866] [2023-12-16 04:53:43,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:53:43,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:53:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:44,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-16 04:53:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:44,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-12-16 04:53:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:44,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-12-16 04:53:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:44,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-12-16 04:53:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:44,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-12-16 04:53:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:44,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2023-12-16 04:53:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:44,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2023-12-16 04:53:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:44,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2023-12-16 04:53:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:44,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2023-12-16 04:53:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:44,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2023-12-16 04:53:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1551 proven. 78 refuted. 0 times theorem prover too weak. 7101 trivial. 0 not checked. [2023-12-16 04:53:44,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:53:44,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420794866] [2023-12-16 04:53:44,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420794866] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 04:53:44,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970481672] [2023-12-16 04:53:44,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 04:53:44,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:53:44,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 04:53:44,373 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) [2023-12-16 04:53:44,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-16 04:53:44,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-12-16 04:53:44,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 04:53:44,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-16 04:53:44,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 04:53:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1596 proven. 78 refuted. 0 times theorem prover too weak. 7056 trivial. 0 not checked. [2023-12-16 04:53:44,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 04:53:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1596 proven. 63 refuted. 0 times theorem prover too weak. 7071 trivial. 0 not checked. [2023-12-16 04:53:44,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970481672] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 04:53:44,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 04:53:44,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 8] total 23 [2023-12-16 04:53:44,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060466771] [2023-12-16 04:53:44,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 04:53:44,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-16 04:53:44,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 04:53:44,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-16 04:53:44,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2023-12-16 04:53:44,802 INFO L87 Difference]: Start difference. First operand 177 states and 198 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-16 04:53:45,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 04:53:45,028 INFO L93 Difference]: Finished difference Result 475 states and 593 transitions. [2023-12-16 04:53:45,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-16 04:53:45,028 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 207 [2023-12-16 04:53:45,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 04:53:45,032 INFO L225 Difference]: With dead ends: 475 [2023-12-16 04:53:45,032 INFO L226 Difference]: Without dead ends: 288 [2023-12-16 04:53:45,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2023-12-16 04:53:45,035 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 04:53:45,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 377 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 04:53:45,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-12-16 04:53:45,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 207. [2023-12-16 04:53:45,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 192 states have (on average 1.171875) internal successors, (225), 193 states have internal predecessors, (225), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-16 04:53:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 248 transitions. [2023-12-16 04:53:45,109 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 248 transitions. Word has length 207 [2023-12-16 04:53:45,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 04:53:45,124 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 248 transitions. [2023-12-16 04:53:45,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-16 04:53:45,126 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 248 transitions. [2023-12-16 04:53:45,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2023-12-16 04:53:45,129 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 04:53:45,129 INFO L195 NwaCegarLoop]: trace histogram [130, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-12-16 04:53:45,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-16 04:53:45,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:53:45,329 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 04:53:45,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 04:53:45,330 INFO L85 PathProgramCache]: Analyzing trace with hash 224450653, now seen corresponding path program 4 times [2023-12-16 04:53:45,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 04:53:45,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147630591] [2023-12-16 04:53:45,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 04:53:45,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 04:53:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:45,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-16 04:53:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:45,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-12-16 04:53:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:45,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-12-16 04:53:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:45,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-12-16 04:53:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:45,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-12-16 04:53:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:45,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2023-12-16 04:53:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:45,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2023-12-16 04:53:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:45,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2023-12-16 04:53:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:45,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2023-12-16 04:53:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:45,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2023-12-16 04:53:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 04:53:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10075 backedges. 1794 proven. 91 refuted. 0 times theorem prover too weak. 8190 trivial. 0 not checked. [2023-12-16 04:53:45,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 04:53:45,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147630591] [2023-12-16 04:53:45,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147630591] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 04:53:45,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272341395] [2023-12-16 04:53:45,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-16 04:53:45,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:53:45,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 04:53:45,813 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) [2023-12-16 04:53:45,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-16 04:53:45,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-16 04:53:45,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 04:53:45,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-16 04:53:45,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 04:53:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10075 backedges. 20 proven. 9053 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2023-12-16 04:53:46,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 04:53:47,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10075 backedges. 53 proven. 9020 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2023-12-16 04:53:47,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272341395] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 04:53:47,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 04:53:47,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24, 24] total 60 [2023-12-16 04:53:47,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244123380] [2023-12-16 04:53:47,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 04:53:47,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-12-16 04:53:47,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 04:53:47,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-12-16 04:53:47,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=2882, Unknown=0, NotChecked=0, Total=3540 [2023-12-16 04:53:47,705 INFO L87 Difference]: Start difference. First operand 207 states and 248 transitions. Second operand has 60 states, 60 states have (on average 2.2333333333333334) internal successors, (134), 60 states have internal predecessors, (134), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Received shutdown request... [2023-12-16 04:54:49,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2023-12-16 04:54:49,584 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 04:54:49,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23773 ImplicationChecksByTransitivity, 61.4s TimeCoverageRelationStatistics Valid=7857, Invalid=58965, Unknown=0, NotChecked=0, Total=66822 [2023-12-16 04:54:49,590 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 88 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 4302 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 4339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 4302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-16 04:54:49,590 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 04:54:49,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 493 Invalid, 4339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 4302 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-16 04:54:49,593 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-16 04:54:49,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-16 04:54:49,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 04:54:49,797 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (207states) and FLOYD_HOARE automaton (currently 223 states, 60 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 259 known predicates. [2023-12-16 04:54:49,801 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1] [2023-12-16 04:54:49,802 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-16 04:54:49,804 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 04:54:49 BoogieIcfgContainer [2023-12-16 04:54:49,804 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-16 04:54:49,804 INFO L158 Benchmark]: Toolchain (without parser) took 76556.89ms. Allocated memory was 242.2MB in the beginning and 361.8MB in the end (delta: 119.5MB). Free memory was 199.5MB in the beginning and 213.2MB in the end (delta: -13.6MB). Peak memory consumption was 106.6MB. Max. memory is 8.0GB. [2023-12-16 04:54:49,804 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 201.3MB. Free memory is still 152.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 04:54:49,804 INFO L158 Benchmark]: CACSL2BoogieTranslator took 162.62ms. Allocated memory is still 242.2MB. Free memory was 199.0MB in the beginning and 188.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-16 04:54:49,805 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.18ms. Allocated memory is still 242.2MB. Free memory was 188.5MB in the beginning and 187.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 04:54:49,805 INFO L158 Benchmark]: Boogie Preprocessor took 27.48ms. Allocated memory is still 242.2MB. Free memory was 187.0MB in the beginning and 185.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-16 04:54:49,805 INFO L158 Benchmark]: RCFGBuilder took 279.92ms. Allocated memory is still 242.2MB. Free memory was 185.4MB in the beginning and 174.4MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-16 04:54:49,805 INFO L158 Benchmark]: TraceAbstraction took 76043.37ms. Allocated memory was 242.2MB in the beginning and 361.8MB in the end (delta: 119.5MB). Free memory was 173.9MB in the beginning and 213.2MB in the end (delta: -39.3MB). Peak memory consumption was 81.4MB. Max. memory is 8.0GB. [2023-12-16 04:54:49,806 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 201.3MB. Free memory is still 152.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 162.62ms. Allocated memory is still 242.2MB. Free memory was 199.0MB in the beginning and 188.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 36.18ms. Allocated memory is still 242.2MB. Free memory was 188.5MB in the beginning and 187.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.48ms. Allocated memory is still 242.2MB. Free memory was 187.0MB in the beginning and 185.4MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 279.92ms. Allocated memory is still 242.2MB. Free memory was 185.4MB in the beginning and 174.4MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 76043.37ms. Allocated memory was 242.2MB in the beginning and 361.8MB in the end (delta: 119.5MB). Free memory was 173.9MB in the beginning and 213.2MB in the end (delta: -39.3MB). Peak memory consumption was 81.4MB. 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 - TimeoutResultAtElement [Line: 7]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 7). Cancelled while NwaCegarLoop was constructing difference of abstraction (207states) and FLOYD_HOARE automaton (currently 223 states, 60 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 259 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 76.0s, OverallIterations: 10, TraceHistogramMax: 130, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 68.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 331 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 317 mSDsluCounter, 1611 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1397 mSDsCounter, 94 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6324 IncrementalHoareTripleChecker+Invalid, 6418 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 94 mSolverCounterUnsat, 214 mSDtfsCounter, 6324 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1635 GetRequests, 1097 SyntacticMatches, 0 SemanticMatches, 537 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33773 ImplicationChecksByTransitivity, 67.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=207occurred in iteration=9, InterpolantAutomatonStates: 242, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 96 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 1163 NumberOfCodeBlocks, 995 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 1693 ConstructedInterpolants, 2 QuantifiedInterpolants, 4314 SizeOfPredicates, 3 NumberOfNonLiveVariables, 1203 ConjunctsInSsa, 135 ConjunctsInUnsatCore, 23 InterpolantComputations, 4 PerfectInterpolantSequences, 39837/60278 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 could not prove your program: Timeout Completed graceful shutdown