/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 07:34:30,137 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 07:34:30,200 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 07:34:30,204 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 07:34:30,204 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 07:34:30,225 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 07:34:30,225 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 07:34:30,225 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 07:34:30,226 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 07:34:30,229 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 07:34:30,229 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 07:34:30,229 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 07:34:30,230 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 07:34:30,230 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 07:34:30,231 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 07:34:30,231 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 07:34:30,231 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 07:34:30,231 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 07:34:30,231 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 07:34:30,232 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 07:34:30,232 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 07:34:30,232 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 07:34:30,233 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 07:34:30,233 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 07:34:30,233 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 07:34:30,233 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 07:34:30,233 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 07:34:30,233 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 07:34:30,234 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 07:34:30,234 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 07:34:30,234 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 07:34:30,235 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 07:34:30,235 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 07:34:30,235 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 07:34:30,235 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 07:34:30,235 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 07:34:30,235 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 07:34:30,235 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 07:34:30,235 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 07:34:30,235 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 07:34:30,236 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 07:34:30,236 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 07:34:30,236 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 07:34:30,236 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 07:34:30,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 07:34:30,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 07:34:30,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 07:34:30,403 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 07:34:30,405 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 07:34:30,406 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound5.c [2023-12-21 07:34:31,409 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 07:34:31,524 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 07:34:31,525 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound5.c [2023-12-21 07:34:31,530 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b7854c3b/e2a3ebee87f74cd58f01faf623c463de/FLAG2bce810ee [2023-12-21 07:34:31,542 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b7854c3b/e2a3ebee87f74cd58f01faf623c463de [2023-12-21 07:34:31,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 07:34:31,545 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 07:34:31,547 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 07:34:31,548 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 07:34:31,551 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 07:34:31,552 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 07:34:31" (1/1) ... [2023-12-21 07:34:31,552 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b05904e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 07:34:31, skipping insertion in model container [2023-12-21 07:34:31,552 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 07:34:31" (1/1) ... [2023-12-21 07:34:31,569 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 07:34:31,710 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound5.c[526,539] [2023-12-21 07:34:31,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 07:34:31,739 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 07:34:31,751 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound5.c[526,539] [2023-12-21 07:34:31,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 07:34:31,772 INFO L206 MainTranslator]: Completed translation [2023-12-21 07:34:31,772 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 07:34:31 WrapperNode [2023-12-21 07:34:31,773 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 07:34:31,774 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 07:34:31,774 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 07:34:31,774 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 07:34:31,779 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 07:34:31" (1/1) ... [2023-12-21 07:34:31,784 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 07:34:31" (1/1) ... [2023-12-21 07:34:31,804 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-12-21 07:34:31,805 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 07:34:31,805 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 07:34:31,805 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 07:34:31,805 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 07:34:31,813 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 07:34:31" (1/1) ... [2023-12-21 07:34:31,813 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 07:34:31" (1/1) ... [2023-12-21 07:34:31,821 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 07:34:31" (1/1) ... [2023-12-21 07:34:31,829 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2023-12-21 07:34:31,830 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 07:34:31" (1/1) ... [2023-12-21 07:34:31,830 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 07:34:31" (1/1) ... [2023-12-21 07:34:31,832 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 07:34:31" (1/1) ... [2023-12-21 07:34:31,834 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 07:34:31" (1/1) ... [2023-12-21 07:34:31,834 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 07:34:31" (1/1) ... [2023-12-21 07:34:31,835 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 07:34:31" (1/1) ... [2023-12-21 07:34:31,836 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 07:34:31,837 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 07:34:31,837 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 07:34:31,837 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 07:34:31,837 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 07:34:31" (1/1) ... [2023-12-21 07:34:31,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 07:34:31,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 07:34:31,865 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-21 07:34:31,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-21 07:34:31,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 07:34:31,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 07:34:31,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-21 07:34:31,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 07:34:31,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 07:34:31,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-21 07:34:31,895 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-21 07:34:31,935 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 07:34:31,936 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 07:34:32,026 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 07:34:32,042 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 07:34:32,042 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-21 07:34:32,042 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 07:34:32 BoogieIcfgContainer [2023-12-21 07:34:32,042 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 07:34:32,044 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 07:34:32,044 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 07:34:32,046 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 07:34:32,046 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 07:34:31" (1/3) ... [2023-12-21 07:34:32,046 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51cfbc92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 07:34:32, skipping insertion in model container [2023-12-21 07:34:32,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 07:34:31" (2/3) ... [2023-12-21 07:34:32,047 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51cfbc92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 07:34:32, skipping insertion in model container [2023-12-21 07:34:32,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 07:34:32" (3/3) ... [2023-12-21 07:34:32,048 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound5.c [2023-12-21 07:34:32,059 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 07:34:32,059 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 07:34:32,087 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 07:34:32,092 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;@4b7df926, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 07:34:32,092 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 07:34:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-21 07:34:32,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-21 07:34:32,099 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 07:34:32,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 07:34:32,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 07:34:32,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 07:34:32,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1830609328, now seen corresponding path program 1 times [2023-12-21 07:34:32,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 07:34:32,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237990325] [2023-12-21 07:34:32,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:34:32,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 07:34:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 07:34:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 07:34:32,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 07:34:32,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237990325] [2023-12-21 07:34:32,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237990325] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 07:34:32,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 07:34:32,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 07:34:32,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471557198] [2023-12-21 07:34:32,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 07:34:32,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 07:34:32,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 07:34:32,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 07:34:32,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 07:34:32,253 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2023-12-21 07:34:32,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 07:34:32,289 INFO L93 Difference]: Finished difference Result 44 states and 78 transitions. [2023-12-21 07:34:32,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 07:34:32,291 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2023-12-21 07:34:32,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 07:34:32,296 INFO L225 Difference]: With dead ends: 44 [2023-12-21 07:34:32,296 INFO L226 Difference]: Without dead ends: 21 [2023-12-21 07:34:32,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 07:34:32,301 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 07:34:32,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 07:34:32,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-21 07:34:32,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-21 07:34:32,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 07:34:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2023-12-21 07:34:32,332 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 8 [2023-12-21 07:34:32,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 07:34:32,332 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2023-12-21 07:34:32,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2023-12-21 07:34:32,333 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2023-12-21 07:34:32,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-21 07:34:32,335 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 07:34:32,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 07:34:32,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 07:34:32,335 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 07:34:32,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 07:34:32,336 INFO L85 PathProgramCache]: Analyzing trace with hash -55601966, now seen corresponding path program 1 times [2023-12-21 07:34:32,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 07:34:32,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353596910] [2023-12-21 07:34:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:34:32,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 07:34:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 07:34:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 07:34:32,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 07:34:32,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353596910] [2023-12-21 07:34:32,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353596910] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 07:34:32,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 07:34:32,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 07:34:32,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078230474] [2023-12-21 07:34:32,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 07:34:32,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 07:34:32,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 07:34:32,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 07:34:32,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 07:34:32,471 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2023-12-21 07:34:32,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 07:34:32,547 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2023-12-21 07:34:32,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 07:34:32,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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 [2023-12-21 07:34:32,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 07:34:32,550 INFO L225 Difference]: With dead ends: 34 [2023-12-21 07:34:32,551 INFO L226 Difference]: Without dead ends: 32 [2023-12-21 07:34:32,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-21 07:34:32,552 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 07:34:32,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 82 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 07:34:32,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-21 07:34:32,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2023-12-21 07:34:32,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 07:34:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-12-21 07:34:32,558 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 8 [2023-12-21 07:34:32,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 07:34:32,558 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-12-21 07:34:32,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2023-12-21 07:34:32,558 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-12-21 07:34:32,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-21 07:34:32,559 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 07:34:32,559 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 07:34:32,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 07:34:32,559 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 07:34:32,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 07:34:32,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1587104181, now seen corresponding path program 1 times [2023-12-21 07:34:32,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 07:34:32,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890931290] [2023-12-21 07:34:32,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:34:32,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 07:34:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 07:34:32,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-21 07:34:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 07:34:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 07:34:32,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 07:34:32,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890931290] [2023-12-21 07:34:32,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890931290] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 07:34:32,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 07:34:32,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 07:34:32,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204413199] [2023-12-21 07:34:32,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 07:34:32,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 07:34:32,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 07:34:32,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 07:34:32,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 07:34:32,668 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-21 07:34:32,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 07:34:32,741 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2023-12-21 07:34:32,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 07:34:32,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-12-21 07:34:32,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 07:34:32,743 INFO L225 Difference]: With dead ends: 38 [2023-12-21 07:34:32,743 INFO L226 Difference]: Without dead ends: 36 [2023-12-21 07:34:32,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-21 07:34:32,747 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 07:34:32,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 78 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 07:34:32,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-21 07:34:32,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2023-12-21 07:34:32,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 07:34:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-12-21 07:34:32,757 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 13 [2023-12-21 07:34:32,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 07:34:32,757 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-12-21 07:34:32,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-21 07:34:32,757 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-12-21 07:34:32,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-21 07:34:32,758 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 07:34:32,758 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 07:34:32,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-21 07:34:32,758 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 07:34:32,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 07:34:32,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1972613170, now seen corresponding path program 1 times [2023-12-21 07:34:32,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 07:34:32,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392070148] [2023-12-21 07:34:32,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:34:32,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 07:34:32,766 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 07:34:32,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96805839] [2023-12-21 07:34:32,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:34:32,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 07:34:32,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 07:34:32,784 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 07:34:32,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 07:34:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 07:34:32,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-21 07:34:32,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 07:34:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 07:34:32,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 07:34:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 07:34:33,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 07:34:33,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392070148] [2023-12-21 07:34:33,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 07:34:33,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96805839] [2023-12-21 07:34:33,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96805839] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 07:34:33,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 07:34:33,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-12-21 07:34:33,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950150536] [2023-12-21 07:34:33,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 07:34:33,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-21 07:34:33,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 07:34:33,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-21 07:34:33,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-12-21 07:34:33,092 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 07:34:37,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 07:34:37,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 07:34:37,410 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2023-12-21 07:34:37,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 07:34:37,411 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 18 [2023-12-21 07:34:37,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 07:34:37,413 INFO L225 Difference]: With dead ends: 64 [2023-12-21 07:34:37,413 INFO L226 Difference]: Without dead ends: 50 [2023-12-21 07:34:37,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-12-21 07:34:37,414 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-12-21 07:34:37,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 96 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 132 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2023-12-21 07:34:37,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-21 07:34:37,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-12-21 07:34:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 32 states have internal predecessors, (34), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-21 07:34:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2023-12-21 07:34:37,428 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 18 [2023-12-21 07:34:37,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 07:34:37,428 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2023-12-21 07:34:37,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 07:34:37,428 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2023-12-21 07:34:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-21 07:34:37,429 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 07:34:37,429 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 07:34:37,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-21 07:34:37,630 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 [2023-12-21 07:34:37,630 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 07:34:37,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 07:34:37,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1810344840, now seen corresponding path program 1 times [2023-12-21 07:34:37,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 07:34:37,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369345210] [2023-12-21 07:34:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:34:37,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 07:34:37,637 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 07:34:37,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126760947] [2023-12-21 07:34:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:34:37,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 07:34:37,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 07:34:37,640 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 07:34:37,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 07:34:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 07:34:37,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-21 07:34:37,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 07:34:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 07:34:37,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 07:34:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 07:34:37,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 07:34:37,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369345210] [2023-12-21 07:34:37,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 07:34:37,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126760947] [2023-12-21 07:34:37,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126760947] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 07:34:37,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 07:34:37,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-12-21 07:34:37,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354699486] [2023-12-21 07:34:37,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 07:34:37,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 07:34:37,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 07:34:37,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 07:34:37,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-21 07:34:37,837 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-21 07:34:37,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 07:34:37,920 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2023-12-21 07:34:37,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 07:34:37,920 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2023-12-21 07:34:37,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 07:34:37,921 INFO L225 Difference]: With dead ends: 65 [2023-12-21 07:34:37,921 INFO L226 Difference]: Without dead ends: 58 [2023-12-21 07:34:37,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-12-21 07:34:37,922 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 07:34:37,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 77 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 07:34:37,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-21 07:34:37,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2023-12-21 07:34:37,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 38 states have internal predecessors, (40), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-21 07:34:37,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2023-12-21 07:34:37,930 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 25 [2023-12-21 07:34:37,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 07:34:37,930 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2023-12-21 07:34:37,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-21 07:34:37,930 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2023-12-21 07:34:37,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-21 07:34:37,931 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 07:34:37,931 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 07:34:37,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-21 07:34:38,140 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 [2023-12-21 07:34:38,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 07:34:38,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 07:34:38,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1460518785, now seen corresponding path program 1 times [2023-12-21 07:34:38,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 07:34:38,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361000861] [2023-12-21 07:34:38,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:34:38,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 07:34:38,151 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 07:34:38,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287318699] [2023-12-21 07:34:38,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:34:38,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 07:34:38,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 07:34:38,152 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 07:34:38,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 07:34:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 07:34:38,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-21 07:34:38,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 07:34:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-21 07:34:38,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 07:34:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-21 07:34:39,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 07:34:39,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361000861] [2023-12-21 07:34:39,226 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 07:34:39,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287318699] [2023-12-21 07:34:39,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287318699] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 07:34:39,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 07:34:39,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-12-21 07:34:39,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677816198] [2023-12-21 07:34:39,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 07:34:39,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 07:34:39,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 07:34:39,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 07:34:39,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-12-21 07:34:39,228 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-12-21 07:34:48,356 WARN L293 SmtUtils]: Spent 9.04s on a formula simplification. DAG size of input: 50 DAG size of output: 48 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 07:34:48,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 07:34:48,842 INFO L93 Difference]: Finished difference Result 141 states and 192 transitions. [2023-12-21 07:34:48,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-21 07:34:48,842 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 55 [2023-12-21 07:34:48,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 07:34:48,843 INFO L225 Difference]: With dead ends: 141 [2023-12-21 07:34:48,843 INFO L226 Difference]: Without dead ends: 110 [2023-12-21 07:34:48,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-12-21 07:34:48,844 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 07:34:48,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 168 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 07:34:48,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-12-21 07:34:48,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2023-12-21 07:34:48,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 70 states have internal predecessors, (76), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (30), 24 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-21 07:34:48,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 137 transitions. [2023-12-21 07:34:48,878 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 137 transitions. Word has length 55 [2023-12-21 07:34:48,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 07:34:48,879 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 137 transitions. [2023-12-21 07:34:48,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-12-21 07:34:48,879 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 137 transitions. [2023-12-21 07:34:48,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-21 07:34:48,884 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 07:34:48,884 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 07:34:48,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 07:34:49,089 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 [2023-12-21 07:34:49,089 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 07:34:49,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 07:34:49,090 INFO L85 PathProgramCache]: Analyzing trace with hash -814878683, now seen corresponding path program 1 times [2023-12-21 07:34:49,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 07:34:49,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427660548] [2023-12-21 07:34:49,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:34:49,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 07:34:49,111 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 07:34:49,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141484587] [2023-12-21 07:34:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:34:49,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 07:34:49,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 07:34:49,113 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 07:34:49,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 07:34:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 07:34:49,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-21 07:34:49,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 07:34:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-12-21 07:34:49,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 07:34:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-12-21 07:34:49,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 07:34:49,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427660548] [2023-12-21 07:34:49,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 07:34:49,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141484587] [2023-12-21 07:34:49,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141484587] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 07:34:49,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 07:34:49,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-12-21 07:34:49,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817083799] [2023-12-21 07:34:49,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 07:34:49,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-21 07:34:49,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 07:34:49,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-21 07:34:49,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-12-21 07:34:49,702 INFO L87 Difference]: Start difference. First operand 105 states and 137 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-12-21 07:34:52,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 07:34:52,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 07:34:52,922 INFO L93 Difference]: Finished difference Result 160 states and 209 transitions. [2023-12-21 07:34:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 07:34:52,923 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 66 [2023-12-21 07:34:52,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 07:34:52,924 INFO L225 Difference]: With dead ends: 160 [2023-12-21 07:34:52,924 INFO L226 Difference]: Without dead ends: 122 [2023-12-21 07:34:52,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-12-21 07:34:52,925 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-21 07:34:52,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 168 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-21 07:34:52,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-12-21 07:34:52,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 100. [2023-12-21 07:34:52,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 65 states have internal predecessors, (71), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-21 07:34:52,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2023-12-21 07:34:52,943 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 66 [2023-12-21 07:34:52,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 07:34:52,943 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2023-12-21 07:34:52,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-12-21 07:34:52,943 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2023-12-21 07:34:52,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-21 07:34:52,944 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 07:34:52,944 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 07:34:52,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-21 07:34:53,156 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 [2023-12-21 07:34:53,157 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 07:34:53,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 07:34:53,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1399001704, now seen corresponding path program 1 times [2023-12-21 07:34:53,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 07:34:53,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103654394] [2023-12-21 07:34:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:34:53,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 07:34:53,163 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 07:34:53,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783953353] [2023-12-21 07:34:53,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:34:53,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 07:34:53,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 07:34:53,166 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 07:34:53,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 07:34:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 07:34:53,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-21 07:34:53,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 07:34:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-21 07:34:53,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 07:34:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-21 07:34:53,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 07:34:53,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103654394] [2023-12-21 07:34:53,618 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 07:34:53,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783953353] [2023-12-21 07:34:53,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783953353] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 07:34:53,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 07:34:53,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-12-21 07:34:53,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710289489] [2023-12-21 07:34:53,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 07:34:53,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-21 07:34:53,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 07:34:53,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-21 07:34:53,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-12-21 07:34:53,619 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-12-21 07:34:53,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 07:34:53,864 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2023-12-21 07:34:53,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-21 07:34:53,864 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 71 [2023-12-21 07:34:53,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 07:34:53,865 INFO L225 Difference]: With dead ends: 116 [2023-12-21 07:34:53,865 INFO L226 Difference]: Without dead ends: 85 [2023-12-21 07:34:53,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-12-21 07:34:53,866 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 07:34:53,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 158 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 07:34:53,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-21 07:34:53,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-12-21 07:34:53,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 56 states have internal predecessors, (59), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-21 07:34:53,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2023-12-21 07:34:53,879 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 71 [2023-12-21 07:34:53,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 07:34:53,879 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2023-12-21 07:34:53,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-12-21 07:34:53,880 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2023-12-21 07:34:53,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-21 07:34:53,880 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 07:34:53,880 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 07:34:53,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 07:34:54,081 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 [2023-12-21 07:34:54,081 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 07:34:54,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 07:34:54,082 INFO L85 PathProgramCache]: Analyzing trace with hash -2065528550, now seen corresponding path program 1 times [2023-12-21 07:34:54,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 07:34:54,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45657407] [2023-12-21 07:34:54,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:34:54,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 07:34:54,087 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 07:34:54,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2093875877] [2023-12-21 07:34:54,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:34:54,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 07:34:54,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 07:34:54,088 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 07:34:54,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 07:34:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 07:34:54,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 07:34:54,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 07:34:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2023-12-21 07:34:54,225 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 07:34:54,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 07:34:54,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45657407] [2023-12-21 07:34:54,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 07:34:54,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093875877] [2023-12-21 07:34:54,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093875877] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 07:34:54,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 07:34:54,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 07:34:54,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923749969] [2023-12-21 07:34:54,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 07:34:54,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 07:34:54,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 07:34:54,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 07:34:54,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-21 07:34:54,226 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-21 07:34:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 07:34:54,293 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2023-12-21 07:34:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 07:34:54,293 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 85 [2023-12-21 07:34:54,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 07:34:54,294 INFO L225 Difference]: With dead ends: 115 [2023-12-21 07:34:54,294 INFO L226 Difference]: Without dead ends: 85 [2023-12-21 07:34:54,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-21 07:34:54,295 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 07:34:54,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 85 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 07:34:54,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-21 07:34:54,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2023-12-21 07:34:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-21 07:34:54,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2023-12-21 07:34:54,307 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 85 [2023-12-21 07:34:54,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 07:34:54,308 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2023-12-21 07:34:54,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-21 07:34:54,308 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2023-12-21 07:34:54,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-21 07:34:54,308 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 07:34:54,309 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-21 07:34:54,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-21 07:34:54,523 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 [2023-12-21 07:34:54,524 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 07:34:54,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 07:34:54,524 INFO L85 PathProgramCache]: Analyzing trace with hash -376584808, now seen corresponding path program 2 times [2023-12-21 07:34:54,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 07:34:54,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509519128] [2023-12-21 07:34:54,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:34:54,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 07:34:54,530 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 07:34:54,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449185930] [2023-12-21 07:34:54,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 07:34:54,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 07:34:54,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 07:34:54,531 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 07:34:54,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 07:34:54,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 07:34:54,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 07:34:54,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-21 07:34:54,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 07:34:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-12-21 07:34:54,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 07:35:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-12-21 07:35:16,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 07:35:16,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509519128] [2023-12-21 07:35:16,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 07:35:16,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449185930] [2023-12-21 07:35:16,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449185930] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 07:35:16,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 07:35:16,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-12-21 07:35:16,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452974856] [2023-12-21 07:35:16,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 07:35:16,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 07:35:16,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 07:35:16,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 07:35:16,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-12-21 07:35:16,022 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-12-21 07:35:57,170 WARN L293 SmtUtils]: Spent 40.71s on a formula simplification. DAG size of input: 174 DAG size of output: 91 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 07:36:02,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 07:36:04,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 07:36:12,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 07:36:16,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 07:36:16,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 07:36:16,349 INFO L93 Difference]: Finished difference Result 153 states and 192 transitions. [2023-12-21 07:36:16,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 07:36:16,349 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 85 [2023-12-21 07:36:16,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 07:36:16,350 INFO L225 Difference]: With dead ends: 153 [2023-12-21 07:36:16,350 INFO L226 Difference]: Without dead ends: 130 [2023-12-21 07:36:16,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 48.5s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-12-21 07:36:16,351 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 89 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 111 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2023-12-21 07:36:16,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 254 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 380 Invalid, 1 Unknown, 0 Unchecked, 13.8s Time] [2023-12-21 07:36:16,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-21 07:36:16,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2023-12-21 07:36:16,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 79 states have (on average 1.139240506329114) internal successors, (90), 85 states have internal predecessors, (90), 35 states have call successors, (35), 13 states have call predecessors, (35), 13 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2023-12-21 07:36:16,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 159 transitions. [2023-12-21 07:36:16,388 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 159 transitions. Word has length 85 [2023-12-21 07:36:16,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 07:36:16,389 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 159 transitions. [2023-12-21 07:36:16,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-12-21 07:36:16,389 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 159 transitions. [2023-12-21 07:36:16,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-21 07:36:16,392 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 07:36:16,392 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 07:36:16,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-21 07:36:16,593 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 [2023-12-21 07:36:16,594 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 07:36:16,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 07:36:16,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1154059924, now seen corresponding path program 2 times [2023-12-21 07:36:16,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 07:36:16,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551415238] [2023-12-21 07:36:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:36:16,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 07:36:16,600 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 07:36:16,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221955047] [2023-12-21 07:36:16,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 07:36:16,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 07:36:16,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 07:36:16,636 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 07:36:16,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-21 07:36:16,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 07:36:16,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 07:36:16,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-21 07:36:16,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 07:36:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-12-21 07:36:16,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 07:36:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-12-21 07:36:28,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 07:36:28,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551415238] [2023-12-21 07:36:28,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 07:36:28,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221955047] [2023-12-21 07:36:28,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221955047] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 07:36:28,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 07:36:28,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-12-21 07:36:28,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586131556] [2023-12-21 07:36:28,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 07:36:28,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 07:36:28,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 07:36:28,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 07:36:28,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-12-21 07:36:28,028 INFO L87 Difference]: Start difference. First operand 128 states and 159 transitions. Second operand has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 20 states have internal predecessors, (45), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2023-12-21 07:36:32,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 07:36:32,375 INFO L93 Difference]: Finished difference Result 183 states and 230 transitions. [2023-12-21 07:36:32,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-21 07:36:32,375 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 20 states have internal predecessors, (45), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 96 [2023-12-21 07:36:32,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 07:36:32,376 INFO L225 Difference]: With dead ends: 183 [2023-12-21 07:36:32,376 INFO L226 Difference]: Without dead ends: 115 [2023-12-21 07:36:32,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2023-12-21 07:36:32,377 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-21 07:36:32,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 245 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-21 07:36:32,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-21 07:36:32,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2023-12-21 07:36:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 64 states have (on average 1.078125) internal successors, (69), 67 states have internal predecessors, (69), 23 states have call successors, (23), 13 states have call predecessors, (23), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-21 07:36:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 114 transitions. [2023-12-21 07:36:32,406 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 114 transitions. Word has length 96 [2023-12-21 07:36:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 07:36:32,406 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 114 transitions. [2023-12-21 07:36:32,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 20 states have internal predecessors, (45), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2023-12-21 07:36:32,407 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 114 transitions. [2023-12-21 07:36:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-21 07:36:32,407 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 07:36:32,407 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 07:36:32,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-21 07:36:32,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-21 07:36:32,612 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 07:36:32,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 07:36:32,613 INFO L85 PathProgramCache]: Analyzing trace with hash 395227745, now seen corresponding path program 2 times [2023-12-21 07:36:32,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 07:36:32,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8878821] [2023-12-21 07:36:32,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:36:32,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 07:36:32,618 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 07:36:32,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196397650] [2023-12-21 07:36:32,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 07:36:32,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 07:36:32,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 07:36:32,619 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 07:36:32,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-21 07:36:32,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 07:36:32,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 07:36:32,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-21 07:36:32,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 07:36:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 38 proven. 100 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-12-21 07:36:33,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 07:37:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 38 proven. 100 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-12-21 07:37:25,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 07:37:25,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8878821] [2023-12-21 07:37:25,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 07:37:25,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196397650] [2023-12-21 07:37:25,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196397650] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 07:37:25,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 07:37:25,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2023-12-21 07:37:25,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425698622] [2023-12-21 07:37:25,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 07:37:25,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-21 07:37:25,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 07:37:25,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-21 07:37:25,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2023-12-21 07:37:25,041 INFO L87 Difference]: Start difference. First operand 101 states and 114 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 26 states have internal predecessors, (53), 15 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) [2023-12-21 07:37:33,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 07:37:49,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 07:37:52,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 07:38:04,585 WARN L293 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 304 DAG size of output: 148 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 07:38:05,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 07:38:05,407 INFO L93 Difference]: Finished difference Result 207 states and 258 transitions. [2023-12-21 07:38:05,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-21 07:38:05,408 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 26 states have internal predecessors, (53), 15 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) Word has length 115 [2023-12-21 07:38:05,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 07:38:05,410 INFO L225 Difference]: With dead ends: 207 [2023-12-21 07:38:05,410 INFO L226 Difference]: Without dead ends: 189 [2023-12-21 07:38:05,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2023-12-21 07:38:05,411 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 73 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2023-12-21 07:38:05,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 534 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2023-12-21 07:38:05,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-12-21 07:38:05,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 177. [2023-12-21 07:38:05,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 111 states have (on average 1.1441441441441442) internal successors, (127), 116 states have internal predecessors, (127), 46 states have call successors, (46), 19 states have call predecessors, (46), 19 states have return successors, (45), 41 states have call predecessors, (45), 45 states have call successors, (45) [2023-12-21 07:38:05,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 218 transitions. [2023-12-21 07:38:05,499 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 218 transitions. Word has length 115 [2023-12-21 07:38:05,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 07:38:05,500 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 218 transitions. [2023-12-21 07:38:05,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 26 states have internal predecessors, (53), 15 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 13 states have call predecessors, (36), 13 states have call successors, (36) [2023-12-21 07:38:05,500 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 218 transitions. [2023-12-21 07:38:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-21 07:38:05,501 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 07:38:05,501 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-12-21 07:38:05,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-21 07:38:05,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 07:38:05,706 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 07:38:05,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 07:38:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2084171487, now seen corresponding path program 3 times [2023-12-21 07:38:05,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 07:38:05,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410228639] [2023-12-21 07:38:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:38:05,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 07:38:05,712 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 07:38:05,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146209318] [2023-12-21 07:38:05,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 07:38:05,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 07:38:05,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 07:38:05,733 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 07:38:05,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-21 07:38:05,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-21 07:38:05,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 07:38:05,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-21 07:38:05,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 07:38:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 156 proven. 44 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2023-12-21 07:38:05,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 07:38:07,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 07:38:07,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410228639] [2023-12-21 07:38:07,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 07:38:07,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146209318] [2023-12-21 07:38:07,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146209318] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 07:38:07,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 07:38:07,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-12-21 07:38:07,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907279434] [2023-12-21 07:38:07,999 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 07:38:07,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-21 07:38:08,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 07:38:08,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-21 07:38:08,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-12-21 07:38:08,000 INFO L87 Difference]: Start difference. First operand 177 states and 218 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-21 07:38:08,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 07:38:08,157 INFO L93 Difference]: Finished difference Result 183 states and 223 transitions. [2023-12-21 07:38:08,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 07:38:08,158 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 115 [2023-12-21 07:38:08,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 07:38:08,158 INFO L225 Difference]: With dead ends: 183 [2023-12-21 07:38:08,158 INFO L226 Difference]: Without dead ends: 179 [2023-12-21 07:38:08,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-12-21 07:38:08,159 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 07:38:08,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 67 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 07:38:08,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-12-21 07:38:08,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2023-12-21 07:38:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 113 states have (on average 1.1327433628318584) internal successors, (128), 117 states have internal predecessors, (128), 46 states have call successors, (46), 20 states have call predecessors, (46), 19 states have return successors, (45), 41 states have call predecessors, (45), 45 states have call successors, (45) [2023-12-21 07:38:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 219 transitions. [2023-12-21 07:38:08,233 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 219 transitions. Word has length 115 [2023-12-21 07:38:08,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 07:38:08,234 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 219 transitions. [2023-12-21 07:38:08,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-12-21 07:38:08,234 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 219 transitions. [2023-12-21 07:38:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-21 07:38:08,236 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 07:38:08,236 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 07:38:08,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-21 07:38:08,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-21 07:38:08,441 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 07:38:08,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 07:38:08,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1031313669, now seen corresponding path program 1 times [2023-12-21 07:38:08,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 07:38:08,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161942861] [2023-12-21 07:38:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:38:08,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 07:38:08,448 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 07:38:08,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304844108] [2023-12-21 07:38:08,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:38:08,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 07:38:08,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 07:38:08,467 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 07:38:08,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-21 07:38:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 07:38:08,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-21 07:38:08,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 07:38:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 42 proven. 112 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2023-12-21 07:38:08,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 07:38:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 42 proven. 112 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2023-12-21 07:38:44,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 07:38:44,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161942861] [2023-12-21 07:38:44,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 07:38:44,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304844108] [2023-12-21 07:38:44,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304844108] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 07:38:44,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 07:38:44,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2023-12-21 07:38:44,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034434724] [2023-12-21 07:38:44,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 07:38:44,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-21 07:38:44,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 07:38:44,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-21 07:38:44,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2023-12-21 07:38:44,318 INFO L87 Difference]: Start difference. First operand 179 states and 219 transitions. Second operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 17 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (40), 15 states have call predecessors, (40), 15 states have call successors, (40) [2023-12-21 07:39:05,198 WARN L293 SmtUtils]: Spent 5.40s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 07:39:11,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 07:39:13,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 07:39:13,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 07:39:13,396 INFO L93 Difference]: Finished difference Result 241 states and 318 transitions. [2023-12-21 07:39:13,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-21 07:39:13,397 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 17 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (40), 15 states have call predecessors, (40), 15 states have call successors, (40) Word has length 126 [2023-12-21 07:39:13,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 07:39:13,398 INFO L225 Difference]: With dead ends: 241 [2023-12-21 07:39:13,398 INFO L226 Difference]: Without dead ends: 231 [2023-12-21 07:39:13,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=470, Invalid=1422, Unknown=0, NotChecked=0, Total=1892 [2023-12-21 07:39:13,401 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 65 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-12-21 07:39:13,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 486 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-12-21 07:39:13,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-12-21 07:39:13,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 217. [2023-12-21 07:39:13,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 136 states have (on average 1.1764705882352942) internal successors, (160), 139 states have internal predecessors, (160), 60 states have call successors, (60), 21 states have call predecessors, (60), 20 states have return successors, (59), 56 states have call predecessors, (59), 59 states have call successors, (59) [2023-12-21 07:39:13,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 279 transitions. [2023-12-21 07:39:13,573 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 279 transitions. Word has length 126 [2023-12-21 07:39:13,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 07:39:13,574 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 279 transitions. [2023-12-21 07:39:13,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 17 states have call successors, (42), 3 states have call predecessors, (42), 2 states have return successors, (40), 15 states have call predecessors, (40), 15 states have call successors, (40) [2023-12-21 07:39:13,574 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 279 transitions. [2023-12-21 07:39:13,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-21 07:39:13,577 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 07:39:13,577 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 07:39:13,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-21 07:39:13,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-21 07:39:13,782 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 07:39:13,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 07:39:13,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1697937979, now seen corresponding path program 3 times [2023-12-21 07:39:13,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 07:39:13,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515914264] [2023-12-21 07:39:13,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 07:39:13,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 07:39:13,789 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 07:39:13,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93932176] [2023-12-21 07:39:13,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 07:39:13,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 07:39:13,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 07:39:13,790 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 07:39:13,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-21 07:39:13,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-21 07:39:13,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 07:39:13,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-21 07:39:13,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 07:39:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 163 proven. 53 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2023-12-21 07:39:13,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 07:39:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2023-12-21 07:39:14,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 07:39:14,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515914264] [2023-12-21 07:39:14,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 07:39:14,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93932176] [2023-12-21 07:39:14,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93932176] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 07:39:14,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 07:39:14,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-12-21 07:39:14,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642017324] [2023-12-21 07:39:14,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 07:39:14,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-21 07:39:14,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 07:39:14,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-21 07:39:14,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-12-21 07:39:14,096 INFO L87 Difference]: Start difference. First operand 217 states and 279 transitions. Second operand has 16 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-12-21 07:39:14,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 07:39:14,353 INFO L93 Difference]: Finished difference Result 217 states and 279 transitions. [2023-12-21 07:39:14,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 07:39:14,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 126 [2023-12-21 07:39:14,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 07:39:14,354 INFO L225 Difference]: With dead ends: 217 [2023-12-21 07:39:14,354 INFO L226 Difference]: Without dead ends: 0 [2023-12-21 07:39:14,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-12-21 07:39:14,355 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 07:39:14,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 83 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 07:39:14,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-21 07:39:14,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-21 07:39:14,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 07:39:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-21 07:39:14,355 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 126 [2023-12-21 07:39:14,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 07:39:14,356 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-21 07:39:14,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-12-21 07:39:14,356 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-21 07:39:14,356 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-21 07:39:14,374 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 07:39:14,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-21 07:39:14,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-21 07:39:14,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-21 07:39:31,911 WARN L293 SmtUtils]: Spent 9.89s on a formula simplification. DAG size of input: 617 DAG size of output: 13 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2023-12-21 07:39:33,705 INFO L899 garLoopResultBuilder]: For program point L52(lines 52 55) no Hoare annotation was computed. [2023-12-21 07:39:33,705 INFO L895 garLoopResultBuilder]: At program point L52-2(lines 44 56) the Hoare annotation is: (and (= |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2023-12-21 07:39:33,705 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 13) no Hoare annotation was computed. [2023-12-21 07:39:33,705 INFO L895 garLoopResultBuilder]: At program point L44-1(lines 44 56) the Hoare annotation is: (and (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) [2023-12-21 07:39:33,705 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse0 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse2 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (= |ULTIMATE.start_main_~p~0#1| 1) .cse0 .cse1 .cse2) (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse0 .cse1 .cse2 (= 2 |ULTIMATE.start_main_~d~0#1|)) (let ((.cse3 (div |ULTIMATE.start_main_~d~0#1| 2))) (and (<= 2 .cse3) .cse0 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= (+ .cse3 |ULTIMATE.start_main_~A~0#1|) (+ |ULTIMATE.start_main_~r~0#1| (div |ULTIMATE.start_main_~p~0#1| 2))) .cse2 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) (<= .cse3 |ULTIMATE.start_main_~r~0#1|))))) [2023-12-21 07:39:33,705 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (= |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2023-12-21 07:39:33,705 INFO L899 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2023-12-21 07:39:33,705 INFO L895 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (and (= |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2023-12-21 07:39:33,706 INFO L899 garLoopResultBuilder]: For program point L37(lines 34 42) no Hoare annotation was computed. [2023-12-21 07:39:33,706 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-21 07:39:33,706 INFO L895 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (or (and (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (and (= |ULTIMATE.start_main_~d~0#1| 1) (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1))) [2023-12-21 07:39:33,706 INFO L899 garLoopResultBuilder]: For program point L46(lines 44 56) no Hoare annotation was computed. [2023-12-21 07:39:33,706 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-21 07:39:33,706 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse0 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse2 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (= |ULTIMATE.start_main_~p~0#1| 1) .cse0 .cse1 .cse2) (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse0 .cse1 .cse2 (= 2 |ULTIMATE.start_main_~d~0#1|)) (let ((.cse3 (div |ULTIMATE.start_main_~d~0#1| 2))) (and (<= 2 .cse3) .cse0 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= (+ .cse3 |ULTIMATE.start_main_~A~0#1|) (+ |ULTIMATE.start_main_~r~0#1| (div |ULTIMATE.start_main_~p~0#1| 2))) .cse2 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) (<= .cse3 |ULTIMATE.start_main_~r~0#1|))))) [2023-12-21 07:39:33,706 INFO L899 garLoopResultBuilder]: For program point L59(line 59) no Hoare annotation was computed. [2023-12-21 07:39:33,706 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse0 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse2 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (= |ULTIMATE.start_main_~p~0#1| 1) .cse0 .cse1 .cse2) (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse0 .cse1 .cse2 (= 2 |ULTIMATE.start_main_~d~0#1|)) (let ((.cse3 (div |ULTIMATE.start_main_~d~0#1| 2))) (and (<= 2 .cse3) .cse0 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= (+ .cse3 |ULTIMATE.start_main_~A~0#1|) (+ |ULTIMATE.start_main_~r~0#1| (div |ULTIMATE.start_main_~p~0#1| 2))) .cse2 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) (<= .cse3 |ULTIMATE.start_main_~r~0#1|))))) [2023-12-21 07:39:33,706 INFO L895 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse0 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse2 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (= |ULTIMATE.start_main_~p~0#1| 1) .cse0 .cse1 .cse2) (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse0 .cse1 .cse2 (= 2 |ULTIMATE.start_main_~d~0#1|)) (let ((.cse3 (div |ULTIMATE.start_main_~d~0#1| 2))) (and (<= 2 .cse3) .cse0 (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) (= (+ .cse3 |ULTIMATE.start_main_~A~0#1|) (+ |ULTIMATE.start_main_~r~0#1| (div |ULTIMATE.start_main_~p~0#1| 2))) .cse2 (= (mod |ULTIMATE.start_main_~d~0#1| 2) 0) (<= .cse3 |ULTIMATE.start_main_~r~0#1|))))) [2023-12-21 07:39:33,706 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2023-12-21 07:39:33,706 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2023-12-21 07:39:33,706 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2023-12-21 07:39:33,706 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2023-12-21 07:39:33,706 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 14 20) the Hoare annotation is: true [2023-12-21 07:39:33,706 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2023-12-21 07:39:33,708 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 07:39:33,709 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 07:39:33,717 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 07:39:33 BoogieIcfgContainer [2023-12-21 07:39:33,717 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 07:39:33,717 INFO L158 Benchmark]: Toolchain (without parser) took 302172.07ms. Allocated memory was 212.9MB in the beginning and 369.1MB in the end (delta: 156.2MB). Free memory was 171.7MB in the beginning and 139.6MB in the end (delta: 32.1MB). Peak memory consumption was 218.2MB. Max. memory is 8.0GB. [2023-12-21 07:39:33,717 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 177.2MB. Free memory was 124.6MB in the beginning and 124.5MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 07:39:33,717 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.94ms. Allocated memory is still 212.9MB. Free memory was 171.7MB in the beginning and 160.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 07:39:33,717 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.87ms. Allocated memory is still 212.9MB. Free memory was 160.1MB in the beginning and 158.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 07:39:33,718 INFO L158 Benchmark]: Boogie Preprocessor took 30.91ms. Allocated memory is still 212.9MB. Free memory was 158.6MB in the beginning and 157.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 07:39:33,718 INFO L158 Benchmark]: RCFGBuilder took 205.85ms. Allocated memory is still 212.9MB. Free memory was 156.5MB in the beginning and 144.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 07:39:33,718 INFO L158 Benchmark]: TraceAbstraction took 301672.99ms. Allocated memory was 212.9MB in the beginning and 369.1MB in the end (delta: 156.2MB). Free memory was 144.4MB in the beginning and 139.6MB in the end (delta: 4.8MB). Peak memory consumption was 191.0MB. Max. memory is 8.0GB. [2023-12-21 07:39:33,719 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 177.2MB. Free memory was 124.6MB in the beginning and 124.5MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 225.94ms. Allocated memory is still 212.9MB. Free memory was 171.7MB in the beginning and 160.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 30.87ms. Allocated memory is still 212.9MB. Free memory was 160.1MB in the beginning and 158.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.91ms. Allocated memory is still 212.9MB. Free memory was 158.6MB in the beginning and 157.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 205.85ms. Allocated memory is still 212.9MB. Free memory was 156.5MB in the beginning and 144.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 301672.99ms. Allocated memory was 212.9MB in the beginning and 369.1MB in the end (delta: 156.2MB). Free memory was 144.4MB in the beginning and 139.6MB in the end (delta: 4.8MB). Peak memory consumption was 191.0MB. 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 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 301.6s, OverallIterations: 15, TraceHistogramMax: 21, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 152.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 19.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 551 SdHoareTripleChecker+Valid, 40.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 507 mSDsluCounter, 2610 SdHoareTripleChecker+Invalid, 39.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2243 mSDsCounter, 700 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3550 IncrementalHoareTripleChecker+Invalid, 4252 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 700 mSolverCounterUnsat, 367 mSDtfsCounter, 3550 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1841 GetRequests, 1577 SyntacticMatches, 1 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 131.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=217occurred in iteration=14, InterpolantAutomatonStates: 185, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 15 MinimizatonAttempts, 92 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 161 PreInvPairs, 286 NumberOfFragments, 359 HoareAnnotationTreeSize, 161 FormulaSimplifications, 155554 FormulaSimplificationTreeSizeReduction, 3.6s HoareSimplificationTime, 10 FormulaSimplificationsInter, 38751 FormulaSimplificationTreeSizeReductionInter, 15.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 126.0s InterpolantComputationTime, 1012 NumberOfCodeBlocks, 885 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1770 ConstructedInterpolants, 0 QuantifiedInterpolants, 38675 SizeOfPredicates, 52 NumberOfNonLiveVariables, 2253 ConjunctsInSsa, 404 ConjunctsInUnsatCore, 25 InterpolantComputations, 4 PerfectInterpolantSequences, 7832/8811 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: (((A == (q + r)) && (d == p)) && (B == 1)) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((((d == 1) && (p == 1)) && (q == 0)) && (A == r)) && (B == 1)) || (((((2 == p) && (q == 0)) && (A == r)) && (B == 1)) && (2 == d))) || (((((((2 <= (d / 2)) && (q == 0)) && (d == p)) && (((d / 2) + A) == (r + (p / 2)))) && (B == 1)) && ((d % 2) == 0)) && ((d / 2) <= r))) RESULT: Ultimate proved your program to be correct! [2023-12-21 07:39:33,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...