/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/recursified_nla-digbench/recursified_prod4br-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 11:03:37,291 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 11:03:37,347 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 11:03:37,350 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 11:03:37,350 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 11:03:37,374 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 11:03:37,375 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 11:03:37,375 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 11:03:37,376 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 11:03:37,378 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 11:03:37,378 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 11:03:37,378 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 11:03:37,379 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 11:03:37,380 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 11:03:37,380 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 11:03:37,380 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 11:03:37,380 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 11:03:37,380 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 11:03:37,380 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 11:03:37,380 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 11:03:37,381 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 11:03:37,381 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 11:03:37,381 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 11:03:37,381 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 11:03:37,381 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 11:03:37,381 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 11:03:37,382 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 11:03:37,382 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 11:03:37,382 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 11:03:37,382 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 11:03:37,383 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 11:03:37,383 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 11:03:37,383 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 11:03:37,383 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 11:03:37,383 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 11:03:37,383 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 11:03:37,383 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 11:03:37,384 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 11:03:37,384 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 11:03:37,384 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 11:03:37,384 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 11:03:37,384 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 11:03:37,385 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 11:03:37,385 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 11:03:37,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 11:03:37,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 11:03:37,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 11:03:37,579 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 11:03:37,580 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 11:03:37,580 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_prod4br-ll.c [2023-12-21 11:03:38,613 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 11:03:38,754 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 11:03:38,755 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_prod4br-ll.c [2023-12-21 11:03:38,759 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/342fd3c43/07cc724c960f48eea9872d86ce4a3729/FLAG9559c9bdf [2023-12-21 11:03:38,768 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/342fd3c43/07cc724c960f48eea9872d86ce4a3729 [2023-12-21 11:03:38,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 11:03:38,770 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 11:03:38,772 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 11:03:38,779 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 11:03:38,782 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 11:03:38,783 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:03:38" (1/1) ... [2023-12-21 11:03:38,783 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e5dff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:03:38, skipping insertion in model container [2023-12-21 11:03:38,783 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:03:38" (1/1) ... [2023-12-21 11:03:38,797 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 11:03:38,905 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_prod4br-ll.c[1060,1073] [2023-12-21 11:03:38,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 11:03:38,928 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 11:03:38,936 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_prod4br-ll.c[1060,1073] [2023-12-21 11:03:38,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 11:03:38,953 INFO L206 MainTranslator]: Completed translation [2023-12-21 11:03:38,953 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:03:38 WrapperNode [2023-12-21 11:03:38,954 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 11:03:38,954 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 11:03:38,954 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 11:03:38,954 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 11:03:38,959 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:03:38" (1/1) ... [2023-12-21 11:03:38,964 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:03:38" (1/1) ... [2023-12-21 11:03:38,975 INFO L138 Inliner]: procedures = 16, calls = 86, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 76 [2023-12-21 11:03:38,976 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 11:03:38,976 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 11:03:38,976 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 11:03:38,976 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 11:03:38,984 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:03:38" (1/1) ... [2023-12-21 11:03:38,984 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:03:38" (1/1) ... [2023-12-21 11:03:38,986 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:03:38" (1/1) ... [2023-12-21 11:03:38,997 INFO L175 MemorySlicer]: Split 57 memory accesses to 7 slices as follows [2, 15, 9, 15, 7, 5, 4]. 26 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 16 writes are split as follows [0, 4, 4, 4, 2, 1, 1]. [2023-12-21 11:03:38,997 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:03:38" (1/1) ... [2023-12-21 11:03:38,997 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:03:38" (1/1) ... [2023-12-21 11:03:39,003 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:03:38" (1/1) ... [2023-12-21 11:03:39,005 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:03:38" (1/1) ... [2023-12-21 11:03:39,007 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:03:38" (1/1) ... [2023-12-21 11:03:39,008 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:03:38" (1/1) ... [2023-12-21 11:03:39,011 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 11:03:39,012 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 11:03:39,012 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 11:03:39,012 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 11:03:39,013 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:03:38" (1/1) ... [2023-12-21 11:03:39,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 11:03:39,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:03:39,046 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 11:03:39,067 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 11:03:39,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 11:03:39,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 11:03:39,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-21 11:03:39,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-21 11:03:39,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-21 11:03:39,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-21 11:03:39,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-12-21 11:03:39,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-12-21 11:03:39,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-21 11:03:39,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-21 11:03:39,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-21 11:03:39,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-21 11:03:39,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-21 11:03:39,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-21 11:03:39,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-12-21 11:03:39,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-12-21 11:03:39,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 11:03:39,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 11:03:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-21 11:03:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-21 11:03:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-21 11:03:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-21 11:03:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-21 11:03:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-12-21 11:03:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-12-21 11:03:39,077 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_0_to_51_0 [2023-12-21 11:03:39,078 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_0_to_51_0 [2023-12-21 11:03:39,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-21 11:03:39,079 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-21 11:03:39,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-21 11:03:39,162 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 11:03:39,164 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 11:03:39,344 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 11:03:39,364 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 11:03:39,364 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-21 11:03:39,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:03:39 BoogieIcfgContainer [2023-12-21 11:03:39,364 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 11:03:39,366 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 11:03:39,366 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 11:03:39,368 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 11:03:39,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:03:38" (1/3) ... [2023-12-21 11:03:39,368 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c83ba37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:03:39, skipping insertion in model container [2023-12-21 11:03:39,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:03:38" (2/3) ... [2023-12-21 11:03:39,369 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c83ba37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:03:39, skipping insertion in model container [2023-12-21 11:03:39,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:03:39" (3/3) ... [2023-12-21 11:03:39,370 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_prod4br-ll.c [2023-12-21 11:03:39,381 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 11:03:39,381 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 11:03:39,414 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 11:03:39,418 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;@1215aef6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 11:03:39,418 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 11:03:39,421 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 11:03:39,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-21 11:03:39,425 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:03:39,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:03:39,426 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:03:39,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:03:39,429 INFO L85 PathProgramCache]: Analyzing trace with hash 2057612999, now seen corresponding path program 1 times [2023-12-21 11:03:39,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:03:39,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10921052] [2023-12-21 11:03:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:03:39,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:03:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:03:39,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:03:39,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10921052] [2023-12-21 11:03:39,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-21 11:03:39,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150538206] [2023-12-21 11:03:39,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:03:39,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:03:39,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:03:39,552 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 11:03:39,558 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 11:03:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:03:39,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-21 11:03:39,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:03:39,675 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 11:03:39,676 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 11:03:39,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150538206] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:03:39,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:03:39,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 11:03:39,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138539231] [2023-12-21 11:03:39,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:03:39,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 11:03:39,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:03:39,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 11:03:39,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 11:03:39,699 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 24 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 11:03:39,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:03:39,727 INFO L93 Difference]: Finished difference Result 60 states and 90 transitions. [2023-12-21 11:03:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 11:03:39,728 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-21 11:03:39,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:03:39,732 INFO L225 Difference]: With dead ends: 60 [2023-12-21 11:03:39,733 INFO L226 Difference]: Without dead ends: 29 [2023-12-21 11:03:39,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 11:03:39,738 INFO L413 NwaCegarLoop]: 39 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, 39 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 11:03:39,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 11:03:39,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-21 11:03:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-12-21 11:03:39,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 11:03:39,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2023-12-21 11:03:39,768 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 10 [2023-12-21 11:03:39,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:03:39,768 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2023-12-21 11:03:39,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 11:03:39,769 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2023-12-21 11:03:39,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-21 11:03:39,770 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:03:39,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:03:39,775 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 11:03:39,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-21 11:03:39,978 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:03:39,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:03:39,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1557295927, now seen corresponding path program 1 times [2023-12-21 11:03:39,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:03:39,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159576996] [2023-12-21 11:03:39,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:03:39,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:03:40,028 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:03:40,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625179684] [2023-12-21 11:03:40,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:03:40,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:03:40,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:03:40,030 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 11:03:40,052 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 11:03:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:03:40,147 WARN L260 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 108 conjunts are in the unsatisfiable core [2023-12-21 11:03:40,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:03:40,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:03:40,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:03:40,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:03:40,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:03:40,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:03:40,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:03:40,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 11:03:40,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 11:03:40,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 11:03:40,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 11:03:40,599 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 11:03:40,599 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 11:03:40,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:03:40,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159576996] [2023-12-21 11:03:40,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:03:40,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625179684] [2023-12-21 11:03:40,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625179684] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:03:40,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:03:40,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-21 11:03:40,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567694183] [2023-12-21 11:03:40,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:03:40,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-21 11:03:40,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:03:40,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-21 11:03:40,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-12-21 11:03:40,604 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 9 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 11:03:40,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:03:40,959 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2023-12-21 11:03:40,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 11:03:40,963 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-21 11:03:40,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:03:40,966 INFO L225 Difference]: With dead ends: 53 [2023-12-21 11:03:40,966 INFO L226 Difference]: Without dead ends: 51 [2023-12-21 11:03:40,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-12-21 11:03:40,969 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 11:03:40,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 118 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 11:03:40,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-21 11:03:40,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2023-12-21 11:03:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 32 states have internal predecessors, (41), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-21 11:03:40,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2023-12-21 11:03:40,980 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 10 [2023-12-21 11:03:40,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:03:40,980 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2023-12-21 11:03:40,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 11:03:40,980 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2023-12-21 11:03:40,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-21 11:03:40,981 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:03:40,981 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:03:40,989 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 11:03:41,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-21 11:03:41,186 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:03:41,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:03:41,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1474177464, now seen corresponding path program 1 times [2023-12-21 11:03:41,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:03:41,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885160858] [2023-12-21 11:03:41,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:03:41,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:03:41,227 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:03:41,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784911554] [2023-12-21 11:03:41,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:03:41,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:03:41,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:03:41,229 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 11:03:41,249 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 11:03:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:03:41,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-21 11:03:41,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:03:41,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 11:03:41,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:03:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:03:41,465 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 11:03:41,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:03:41,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885160858] [2023-12-21 11:03:41,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:03:41,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784911554] [2023-12-21 11:03:41,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784911554] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:03:41,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:03:41,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-21 11:03:41,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123007889] [2023-12-21 11:03:41,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:03:41,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-21 11:03:41,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:03:41,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-21 11:03:41,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-21 11:03:41,473 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 11:03:41,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:03:41,704 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2023-12-21 11:03:41,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 11:03:41,704 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-12-21 11:03:41,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:03:41,707 INFO L225 Difference]: With dead ends: 64 [2023-12-21 11:03:41,707 INFO L226 Difference]: Without dead ends: 52 [2023-12-21 11:03:41,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-12-21 11:03:41,709 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 11:03:41,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 64 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 11:03:41,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-21 11:03:41,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2023-12-21 11:03:41,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 37 states have internal predecessors, (45), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-21 11:03:41,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2023-12-21 11:03:41,720 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 21 [2023-12-21 11:03:41,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:03:41,720 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2023-12-21 11:03:41,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 11:03:41,721 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2023-12-21 11:03:41,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-21 11:03:41,721 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:03:41,721 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:03:41,732 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 11:03:41,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:03:41,926 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:03:41,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:03:41,927 INFO L85 PathProgramCache]: Analyzing trace with hash -794119094, now seen corresponding path program 1 times [2023-12-21 11:03:41,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:03:41,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970533189] [2023-12-21 11:03:41,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:03:41,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:03:41,946 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:03:41,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867424544] [2023-12-21 11:03:41,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:03:41,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:03:41,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:03:41,948 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 11:03:41,970 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 11:03:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:03:42,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 77 conjunts are in the unsatisfiable core [2023-12-21 11:03:42,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:03:42,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:03:42,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:03:42,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:03:42,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:03:42,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:03:42,418 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:03:42,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2023-12-21 11:03:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:03:42,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:03:42,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:03:42,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970533189] [2023-12-21 11:03:42,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:03:42,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867424544] [2023-12-21 11:03:42,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867424544] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:03:42,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:03:42,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-12-21 11:03:42,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544893098] [2023-12-21 11:03:42,972 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:03:42,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 11:03:42,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:03:42,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 11:03:42,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2023-12-21 11:03:42,973 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 18 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 11:03:46,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 11:03:47,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:03:47,661 INFO L93 Difference]: Finished difference Result 87 states and 122 transitions. [2023-12-21 11:03:47,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-21 11:03:47,662 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-12-21 11:03:47,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:03:47,663 INFO L225 Difference]: With dead ends: 87 [2023-12-21 11:03:47,663 INFO L226 Difference]: Without dead ends: 58 [2023-12-21 11:03:47,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=1149, Unknown=0, NotChecked=0, Total=1332 [2023-12-21 11:03:47,664 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-21 11:03:47,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 112 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 404 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-12-21 11:03:47,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-21 11:03:47,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2023-12-21 11:03:47,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.263157894736842) internal successors, (48), 42 states have internal predecessors, (48), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-21 11:03:47,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2023-12-21 11:03:47,672 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 21 [2023-12-21 11:03:47,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:03:47,672 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2023-12-21 11:03:47,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 11:03:47,673 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2023-12-21 11:03:47,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-21 11:03:47,673 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:03:47,673 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:03:47,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-21 11:03:47,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:03:47,881 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:03:47,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:03:47,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1237036607, now seen corresponding path program 1 times [2023-12-21 11:03:47,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:03:47,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64925879] [2023-12-21 11:03:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:03:47,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:03:47,895 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:03:47,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782509276] [2023-12-21 11:03:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:03:47,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:03:47,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:03:47,896 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 11:03:47,923 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 11:03:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:03:48,015 WARN L260 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 202 conjunts are in the unsatisfiable core [2023-12-21 11:03:48,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:03:48,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:03:48,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:03:48,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:03:48,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:03:48,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:03:48,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:03:48,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2023-12-21 11:03:48,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 11:03:48,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2023-12-21 11:03:49,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2023-12-21 11:03:49,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-21 11:03:49,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2023-12-21 11:03:49,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-21 11:03:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:03:49,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:03:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:03:50,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:03:50,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64925879] [2023-12-21 11:03:50,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:03:50,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782509276] [2023-12-21 11:03:50,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782509276] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 11:03:50,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:03:50,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 29 [2023-12-21 11:03:50,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371236667] [2023-12-21 11:03:50,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 11:03:50,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-21 11:03:50,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:03:50,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-21 11:03:50,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2023-12-21 11:03:50,764 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 29 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 11:04:00,145 WARN L293 SmtUtils]: Spent 8.12s on a formula simplification. DAG size of input: 137 DAG size of output: 96 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 11:04:26,139 WARN L293 SmtUtils]: Spent 15.12s on a formula simplification. DAG size of input: 110 DAG size of output: 88 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 11:04:32,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-21 11:04:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:04:32,607 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2023-12-21 11:04:32,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-21 11:04:32,607 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-12-21 11:04:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:04:32,609 INFO L225 Difference]: With dead ends: 105 [2023-12-21 11:04:32,609 INFO L226 Difference]: Without dead ends: 101 [2023-12-21 11:04:32,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=323, Invalid=2029, Unknown=0, NotChecked=0, Total=2352 [2023-12-21 11:04:32,610 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 265 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-12-21 11:04:32,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 194 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 709 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2023-12-21 11:04:32,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-21 11:04:32,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2023-12-21 11:04:32,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 59 states have internal predecessors, (69), 11 states have call successors, (11), 8 states have call predecessors, (11), 11 states have return successors, (19), 10 states have call predecessors, (19), 9 states have call successors, (19) [2023-12-21 11:04:32,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2023-12-21 11:04:32,622 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 23 [2023-12-21 11:04:32,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:04:32,623 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2023-12-21 11:04:32,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 11:04:32,623 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2023-12-21 11:04:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-21 11:04:32,623 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:04:32,624 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:04:32,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-21 11:04:32,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:04:32,831 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:04:32,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:04:32,831 INFO L85 PathProgramCache]: Analyzing trace with hash -61793774, now seen corresponding path program 1 times [2023-12-21 11:04:32,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:04:32,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646585922] [2023-12-21 11:04:32,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:04:32,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:04:32,843 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:04:32,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420087565] [2023-12-21 11:04:32,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:04:32,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:04:32,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:04:32,844 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 11:04:32,846 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 11:04:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:04:32,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-21 11:04:32,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:04:32,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:04:32,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:04:32,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:04:32,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:04:32,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:04:33,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 11:04:33,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 11:04:33,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-21 11:04:33,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-21 11:04:33,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:04:33,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:04:41,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:04:41,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646585922] [2023-12-21 11:04:41,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:04:41,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420087565] [2023-12-21 11:04:41,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420087565] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:04:41,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:04:41,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-12-21 11:04:41,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270015281] [2023-12-21 11:04:41,176 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:04:41,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 11:04:41,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:04:41,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 11:04:41,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=227, Unknown=1, NotChecked=0, Total=272 [2023-12-21 11:04:41,177 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-21 11:04:41,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:04:41,584 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2023-12-21 11:04:41,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 11:04:41,584 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2023-12-21 11:04:41,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:04:41,585 INFO L225 Difference]: With dead ends: 80 [2023-12-21 11:04:41,585 INFO L226 Difference]: Without dead ends: 65 [2023-12-21 11:04:41,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=103, Invalid=448, Unknown=1, NotChecked=0, Total=552 [2023-12-21 11:04:41,586 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 11:04:41,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 110 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 11:04:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-21 11:04:41,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-12-21 11:04:41,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 50 states have internal predecessors, (59), 9 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2023-12-21 11:04:41,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 85 transitions. [2023-12-21 11:04:41,598 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 85 transitions. Word has length 27 [2023-12-21 11:04:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:04:41,598 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 85 transitions. [2023-12-21 11:04:41,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-21 11:04:41,598 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 85 transitions. [2023-12-21 11:04:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-21 11:04:41,599 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:04:41,599 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:04:41,606 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 11:04:41,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:04:41,804 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:04:41,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:04:41,804 INFO L85 PathProgramCache]: Analyzing trace with hash -736922499, now seen corresponding path program 1 times [2023-12-21 11:04:41,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:04:41,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221954268] [2023-12-21 11:04:41,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:04:41,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:04:41,816 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:04:41,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155043766] [2023-12-21 11:04:41,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:04:41,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:04:41,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:04:41,817 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 11:04:41,828 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 11:04:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:04:41,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-21 11:04:41,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:04:41,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 11:04:41,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:04:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 11:04:42,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:04:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:04:43,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:04:43,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221954268] [2023-12-21 11:04:43,038 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:04:43,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155043766] [2023-12-21 11:04:43,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155043766] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 11:04:43,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:04:43,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2023-12-21 11:04:43,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762593362] [2023-12-21 11:04:43,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 11:04:43,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-21 11:04:43,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:04:43,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-21 11:04:43,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2023-12-21 11:04:43,040 INFO L87 Difference]: Start difference. First operand 65 states and 85 transitions. Second operand has 28 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-21 11:04:43,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:04:43,946 INFO L93 Difference]: Finished difference Result 100 states and 165 transitions. [2023-12-21 11:04:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-21 11:04:43,946 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 36 [2023-12-21 11:04:43,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:04:43,947 INFO L225 Difference]: With dead ends: 100 [2023-12-21 11:04:43,947 INFO L226 Difference]: Without dead ends: 86 [2023-12-21 11:04:43,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2023-12-21 11:04:43,948 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 143 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 11:04:43,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 109 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 11:04:43,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-21 11:04:43,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 63. [2023-12-21 11:04:43,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 49 states have internal predecessors, (57), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-12-21 11:04:43,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2023-12-21 11:04:43,961 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 36 [2023-12-21 11:04:43,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:04:43,961 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2023-12-21 11:04:43,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-21 11:04:43,962 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2023-12-21 11:04:43,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-21 11:04:43,962 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:04:43,963 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:04:43,972 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 11:04:44,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:04:44,170 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:04:44,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:04:44,171 INFO L85 PathProgramCache]: Analyzing trace with hash -35857921, now seen corresponding path program 1 times [2023-12-21 11:04:44,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:04:44,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460212919] [2023-12-21 11:04:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:04:44,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:04:44,190 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:04:44,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132176589] [2023-12-21 11:04:44,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:04:44,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:04:44,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:04:44,196 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 11:04:44,198 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 11:04:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:04:44,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-21 11:04:44,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:04:44,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2023-12-21 11:04:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:04:44,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:04:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:04:44,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:04:44,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460212919] [2023-12-21 11:04:44,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:04:44,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132176589] [2023-12-21 11:04:44,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132176589] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 11:04:44,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:04:44,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-12-21 11:04:44,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883139300] [2023-12-21 11:04:44,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 11:04:44,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 11:04:44,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:04:44,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 11:04:44,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-12-21 11:04:44,649 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-21 11:04:45,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:04:45,223 INFO L93 Difference]: Finished difference Result 102 states and 200 transitions. [2023-12-21 11:04:45,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 11:04:45,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2023-12-21 11:04:45,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:04:45,225 INFO L225 Difference]: With dead ends: 102 [2023-12-21 11:04:45,225 INFO L226 Difference]: Without dead ends: 85 [2023-12-21 11:04:45,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2023-12-21 11:04:45,226 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 102 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 11:04:45,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 119 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 11:04:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-21 11:04:45,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2023-12-21 11:04:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 52 states have internal predecessors, (63), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (16), 7 states have call predecessors, (16), 10 states have call successors, (16) [2023-12-21 11:04:45,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 90 transitions. [2023-12-21 11:04:45,237 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 90 transitions. Word has length 36 [2023-12-21 11:04:45,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:04:45,237 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 90 transitions. [2023-12-21 11:04:45,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-21 11:04:45,238 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 90 transitions. [2023-12-21 11:04:45,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 11:04:45,239 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:04:45,239 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:04:45,248 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 11:04:45,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-21 11:04:45,448 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:04:45,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:04:45,449 INFO L85 PathProgramCache]: Analyzing trace with hash 2055654893, now seen corresponding path program 1 times [2023-12-21 11:04:45,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:04:45,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302013345] [2023-12-21 11:04:45,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:04:45,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:04:45,460 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:04:45,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136273884] [2023-12-21 11:04:45,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:04:45,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:04:45,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:04:45,462 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 11:04:45,480 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 11:04:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:04:45,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-21 11:04:45,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:04:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:04:45,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 11:04:45,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:04:45,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302013345] [2023-12-21 11:04:45,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:04:45,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136273884] [2023-12-21 11:04:45,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136273884] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:04:45,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:04:45,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 11:04:45,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928546974] [2023-12-21 11:04:45,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:04:45,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 11:04:45,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:04:45,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 11:04:45,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 11:04:45,609 INFO L87 Difference]: Start difference. First operand 65 states and 90 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 11:04:45,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:04:45,739 INFO L93 Difference]: Finished difference Result 109 states and 169 transitions. [2023-12-21 11:04:45,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 11:04:45,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2023-12-21 11:04:45,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:04:45,740 INFO L225 Difference]: With dead ends: 109 [2023-12-21 11:04:45,740 INFO L226 Difference]: Without dead ends: 67 [2023-12-21 11:04:45,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 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 11:04:45,741 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:04:45,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 109 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 11:04:45,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-21 11:04:45,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2023-12-21 11:04:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 53 states have internal predecessors, (62), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (16), 7 states have call predecessors, (16), 10 states have call successors, (16) [2023-12-21 11:04:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 89 transitions. [2023-12-21 11:04:45,755 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 89 transitions. Word has length 40 [2023-12-21 11:04:45,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:04:45,757 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 89 transitions. [2023-12-21 11:04:45,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 11:04:45,757 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 89 transitions. [2023-12-21 11:04:45,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 11:04:45,761 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:04:45,761 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:04:45,766 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 11:04:45,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:04:45,961 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:04:45,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:04:45,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1921641387, now seen corresponding path program 1 times [2023-12-21 11:04:45,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:04:45,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980740946] [2023-12-21 11:04:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:04:45,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:04:45,973 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:04:45,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299289029] [2023-12-21 11:04:45,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:04:45,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:04:45,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:04:45,974 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 11:04:45,979 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 11:04:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:04:46,102 WARN L260 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 173 conjunts are in the unsatisfiable core [2023-12-21 11:04:46,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:04:46,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:04:46,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:04:46,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:04:46,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:04:46,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:04:46,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:04:46,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:04:46,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:04:47,597 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 11:04:47,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-21 11:04:47,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:04:47,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 11:04:47,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 11:04:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 11:04:47,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:04:56,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:04:56,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980740946] [2023-12-21 11:04:56,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:04:56,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299289029] [2023-12-21 11:04:56,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299289029] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:04:56,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:04:56,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-12-21 11:04:56,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458530139] [2023-12-21 11:04:56,515 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:04:56,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 11:04:56,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:04:56,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 11:04:56,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2023-12-21 11:04:56,516 INFO L87 Difference]: Start difference. First operand 66 states and 89 transitions. Second operand has 21 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 11:04:58,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:04:58,662 INFO L93 Difference]: Finished difference Result 81 states and 116 transitions. [2023-12-21 11:04:58,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-21 11:04:58,663 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 40 [2023-12-21 11:04:58,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:04:58,663 INFO L225 Difference]: With dead ends: 81 [2023-12-21 11:04:58,663 INFO L226 Difference]: Without dead ends: 79 [2023-12-21 11:04:58,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=214, Invalid=1508, Unknown=0, NotChecked=0, Total=1722 [2023-12-21 11:04:58,664 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 51 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-21 11:04:58,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 130 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-21 11:04:58,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-21 11:04:58,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2023-12-21 11:04:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 60 states have internal predecessors, (68), 13 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (31), 9 states have call predecessors, (31), 12 states have call successors, (31) [2023-12-21 11:04:58,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 112 transitions. [2023-12-21 11:04:58,673 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 112 transitions. Word has length 40 [2023-12-21 11:04:58,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:04:58,673 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 112 transitions. [2023-12-21 11:04:58,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 11:04:58,673 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 112 transitions. [2023-12-21 11:04:58,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-21 11:04:58,674 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:04:58,674 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:04:58,679 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 11:04:58,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-21 11:04:58,879 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:04:58,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:04:58,880 INFO L85 PathProgramCache]: Analyzing trace with hash 800419013, now seen corresponding path program 1 times [2023-12-21 11:04:58,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:04:58,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022625609] [2023-12-21 11:04:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:04:58,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:04:58,892 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:04:58,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666207594] [2023-12-21 11:04:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:04:58,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:04:58,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:04:58,910 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 11:04:58,912 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 11:04:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:04:59,044 WARN L260 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 189 conjunts are in the unsatisfiable core [2023-12-21 11:04:59,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:04:59,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:04:59,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:04:59,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:04:59,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:04:59,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:04:59,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:04:59,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:04:59,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:05:00,702 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 11:05:00,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-21 11:05:00,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:05:00,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 11:05:00,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 11:05:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 11:05:00,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:05:14,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:05:14,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022625609] [2023-12-21 11:05:14,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:05:14,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666207594] [2023-12-21 11:05:14,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666207594] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:05:14,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:05:14,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-21 11:05:14,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73645189] [2023-12-21 11:05:14,668 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:05:14,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 11:05:14,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:05:14,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 11:05:14,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=715, Unknown=1, NotChecked=0, Total=812 [2023-12-21 11:05:14,669 INFO L87 Difference]: Start difference. First operand 77 states and 112 transitions. Second operand has 20 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 11:05:17,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:05:17,439 INFO L93 Difference]: Finished difference Result 105 states and 163 transitions. [2023-12-21 11:05:17,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 11:05:17,440 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2023-12-21 11:05:17,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:05:17,441 INFO L225 Difference]: With dead ends: 105 [2023-12-21 11:05:17,441 INFO L226 Difference]: Without dead ends: 91 [2023-12-21 11:05:17,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=228, Invalid=1663, Unknown=1, NotChecked=0, Total=1892 [2023-12-21 11:05:17,442 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-21 11:05:17,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 187 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-21 11:05:17,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-21 11:05:17,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2023-12-21 11:05:17,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.25) internal successors, (70), 62 states have internal predecessors, (70), 13 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (41), 11 states have call predecessors, (41), 12 states have call successors, (41) [2023-12-21 11:05:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 124 transitions. [2023-12-21 11:05:17,451 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 124 transitions. Word has length 38 [2023-12-21 11:05:17,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:05:17,451 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 124 transitions. [2023-12-21 11:05:17,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 11:05:17,451 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 124 transitions. [2023-12-21 11:05:17,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 11:05:17,452 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:05:17,452 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:05:17,457 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 11:05:17,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-21 11:05:17,657 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:05:17,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:05:17,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1950624083, now seen corresponding path program 1 times [2023-12-21 11:05:17,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:05:17,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953465436] [2023-12-21 11:05:17,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:17,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:05:17,671 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:05:17,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389271640] [2023-12-21 11:05:17,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:17,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:05:17,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:05:17,672 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 11:05:17,673 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 11:05:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:05:17,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-21 11:05:17,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:05:17,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 11:05:17,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:05:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:05:18,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:05:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:05:18,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:05:18,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953465436] [2023-12-21 11:05:18,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:05:18,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389271640] [2023-12-21 11:05:18,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389271640] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 11:05:18,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:05:18,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-12-21 11:05:18,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033603601] [2023-12-21 11:05:18,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 11:05:18,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 11:05:18,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:05:18,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 11:05:18,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-12-21 11:05:18,385 INFO L87 Difference]: Start difference. First operand 81 states and 124 transitions. Second operand has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 7 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 11:05:19,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:05:19,000 INFO L93 Difference]: Finished difference Result 112 states and 203 transitions. [2023-12-21 11:05:19,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-21 11:05:19,001 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 7 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2023-12-21 11:05:19,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:05:19,002 INFO L225 Difference]: With dead ends: 112 [2023-12-21 11:05:19,002 INFO L226 Difference]: Without dead ends: 102 [2023-12-21 11:05:19,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2023-12-21 11:05:19,003 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 76 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 11:05:19,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 120 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 11:05:19,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-21 11:05:19,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2023-12-21 11:05:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 66 states have internal predecessors, (73), 15 states have call successors, (15), 7 states have call predecessors, (15), 12 states have return successors, (61), 12 states have call predecessors, (61), 14 states have call successors, (61) [2023-12-21 11:05:19,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 149 transitions. [2023-12-21 11:05:19,015 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 149 transitions. Word has length 40 [2023-12-21 11:05:19,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:05:19,015 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 149 transitions. [2023-12-21 11:05:19,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 7 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 11:05:19,015 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 149 transitions. [2023-12-21 11:05:19,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 11:05:19,016 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:05:19,016 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:05:19,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-21 11:05:19,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-21 11:05:19,221 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:05:19,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:05:19,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1731769365, now seen corresponding path program 1 times [2023-12-21 11:05:19,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:05:19,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168062607] [2023-12-21 11:05:19,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:19,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:05:19,232 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:05:19,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862789700] [2023-12-21 11:05:19,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:19,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:05:19,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:05:19,234 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:05:19,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-21 11:05:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:05:19,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 11:05:19,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:05:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:05:19,379 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 11:05:19,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:05:19,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168062607] [2023-12-21 11:05:19,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:05:19,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862789700] [2023-12-21 11:05:19,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862789700] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:05:19,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:05:19,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 11:05:19,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089193450] [2023-12-21 11:05:19,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:05:19,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 11:05:19,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:05:19,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 11:05:19,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 11:05:19,381 INFO L87 Difference]: Start difference. First operand 86 states and 149 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 11:05:19,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:05:19,534 INFO L93 Difference]: Finished difference Result 147 states and 278 transitions. [2023-12-21 11:05:19,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 11:05:19,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2023-12-21 11:05:19,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:05:19,535 INFO L225 Difference]: With dead ends: 147 [2023-12-21 11:05:19,535 INFO L226 Difference]: Without dead ends: 84 [2023-12-21 11:05:19,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 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 11:05:19,536 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 4 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:05:19,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 110 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 11:05:19,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-21 11:05:19,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-12-21 11:05:19,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 64 states have internal predecessors, (70), 14 states have call successors, (14), 7 states have call predecessors, (14), 12 states have return successors, (54), 12 states have call predecessors, (54), 13 states have call successors, (54) [2023-12-21 11:05:19,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 138 transitions. [2023-12-21 11:05:19,546 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 138 transitions. Word has length 40 [2023-12-21 11:05:19,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:05:19,546 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 138 transitions. [2023-12-21 11:05:19,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 11:05:19,546 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 138 transitions. [2023-12-21 11:05:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 11:05:19,547 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:05:19,547 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:05:19,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-21 11:05:19,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-21 11:05:19,748 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:05:19,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:05:19,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1754570963, now seen corresponding path program 1 times [2023-12-21 11:05:19,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:05:19,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636338185] [2023-12-21 11:05:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:19,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:05:19,759 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:05:19,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472213734] [2023-12-21 11:05:19,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:19,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:05:19,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:05:19,762 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:05:19,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-21 11:05:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:05:19,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-21 11:05:19,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:05:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:05:19,910 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 11:05:19,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:05:19,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636338185] [2023-12-21 11:05:19,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:05:19,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472213734] [2023-12-21 11:05:19,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472213734] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:05:19,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:05:19,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 11:05:19,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968628894] [2023-12-21 11:05:19,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:05:19,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 11:05:19,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:05:19,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 11:05:19,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 11:05:19,912 INFO L87 Difference]: Start difference. First operand 84 states and 138 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 11:05:20,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:05:20,030 INFO L93 Difference]: Finished difference Result 148 states and 272 transitions. [2023-12-21 11:05:20,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 11:05:20,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2023-12-21 11:05:20,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:05:20,031 INFO L225 Difference]: With dead ends: 148 [2023-12-21 11:05:20,031 INFO L226 Difference]: Without dead ends: 87 [2023-12-21 11:05:20,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 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 11:05:20,032 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:05:20,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 110 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 11:05:20,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-21 11:05:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2023-12-21 11:05:20,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 66 states have internal predecessors, (72), 14 states have call successors, (14), 7 states have call predecessors, (14), 12 states have return successors, (54), 12 states have call predecessors, (54), 13 states have call successors, (54) [2023-12-21 11:05:20,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 140 transitions. [2023-12-21 11:05:20,055 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 140 transitions. Word has length 40 [2023-12-21 11:05:20,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:05:20,055 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 140 transitions. [2023-12-21 11:05:20,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 11:05:20,055 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 140 transitions. [2023-12-21 11:05:20,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 11:05:20,057 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:05:20,057 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:05:20,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-21 11:05:20,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:05:20,261 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:05:20,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:05:20,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1535716245, now seen corresponding path program 1 times [2023-12-21 11:05:20,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:05:20,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452655172] [2023-12-21 11:05:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:20,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:05:20,281 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:05:20,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478164906] [2023-12-21 11:05:20,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:20,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:05:20,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:05:20,283 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:05:20,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-21 11:05:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:05:20,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 166 conjunts are in the unsatisfiable core [2023-12-21 11:05:20,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:05:20,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:05:20,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:05:20,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:05:20,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:05:20,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:05:20,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:05:21,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:05:21,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:05:21,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 11:05:21,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 11:05:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 11:05:22,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:05:26,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:05:26,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452655172] [2023-12-21 11:05:26,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:05:26,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478164906] [2023-12-21 11:05:26,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478164906] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:05:26,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:05:26,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-12-21 11:05:26,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932004517] [2023-12-21 11:05:26,760 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:05:26,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-21 11:05:26,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:05:26,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-21 11:05:26,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 11:05:26,761 INFO L87 Difference]: Start difference. First operand 86 states and 140 transitions. Second operand has 25 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 19 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 11:05:30,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 11:05:32,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:05:32,796 INFO L93 Difference]: Finished difference Result 102 states and 176 transitions. [2023-12-21 11:05:32,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 11:05:32,797 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 19 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 40 [2023-12-21 11:05:32,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:05:32,798 INFO L225 Difference]: With dead ends: 102 [2023-12-21 11:05:32,798 INFO L226 Difference]: Without dead ends: 100 [2023-12-21 11:05:32,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=291, Invalid=2061, Unknown=0, NotChecked=0, Total=2352 [2023-12-21 11:05:32,799 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 103 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:05:32,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 127 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 698 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2023-12-21 11:05:32,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-21 11:05:32,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2023-12-21 11:05:32,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 66 states have internal predecessors, (72), 14 states have call successors, (14), 7 states have call predecessors, (14), 12 states have return successors, (54), 12 states have call predecessors, (54), 13 states have call successors, (54) [2023-12-21 11:05:32,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 140 transitions. [2023-12-21 11:05:32,810 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 140 transitions. Word has length 40 [2023-12-21 11:05:32,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:05:32,810 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 140 transitions. [2023-12-21 11:05:32,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 19 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 11:05:32,810 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 140 transitions. [2023-12-21 11:05:32,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 11:05:32,811 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:05:32,811 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:05:32,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-21 11:05:33,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-21 11:05:33,017 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:05:33,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:05:33,017 INFO L85 PathProgramCache]: Analyzing trace with hash -834651667, now seen corresponding path program 1 times [2023-12-21 11:05:33,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:05:33,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529018031] [2023-12-21 11:05:33,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:33,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:05:33,032 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:05:33,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251647256] [2023-12-21 11:05:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:33,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:05:33,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:05:33,034 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:05:33,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-21 11:05:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:05:33,172 WARN L260 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 194 conjunts are in the unsatisfiable core [2023-12-21 11:05:33,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:05:33,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:05:33,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:05:33,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:05:33,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:05:33,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:05:33,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:05:33,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:05:33,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:05:34,989 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-21 11:05:34,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-21 11:05:34,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:05:35,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 11:05:35,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 11:05:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-21 11:05:35,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:05:41,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:05:41,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529018031] [2023-12-21 11:05:41,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:05:41,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251647256] [2023-12-21 11:05:41,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251647256] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:05:41,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:05:41,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-12-21 11:05:41,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436717640] [2023-12-21 11:05:41,571 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:05:41,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 11:05:41,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:05:41,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 11:05:41,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2023-12-21 11:05:41,571 INFO L87 Difference]: Start difference. First operand 86 states and 140 transitions. Second operand has 22 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 11:05:47,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:05:48,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:05:48,496 INFO L93 Difference]: Finished difference Result 102 states and 180 transitions. [2023-12-21 11:05:48,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 11:05:48,497 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 40 [2023-12-21 11:05:48,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:05:48,500 INFO L225 Difference]: With dead ends: 102 [2023-12-21 11:05:48,501 INFO L226 Difference]: Without dead ends: 100 [2023-12-21 11:05:48,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=248, Invalid=1822, Unknown=0, NotChecked=0, Total=2070 [2023-12-21 11:05:48,502 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-12-21 11:05:48,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 139 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 603 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2023-12-21 11:05:48,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-21 11:05:48,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 88. [2023-12-21 11:05:48,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 68 states have internal predecessors, (73), 15 states have call successors, (15), 7 states have call predecessors, (15), 12 states have return successors, (62), 12 states have call predecessors, (62), 14 states have call successors, (62) [2023-12-21 11:05:48,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 150 transitions. [2023-12-21 11:05:48,522 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 150 transitions. Word has length 40 [2023-12-21 11:05:48,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:05:48,522 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 150 transitions. [2023-12-21 11:05:48,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 11:05:48,522 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 150 transitions. [2023-12-21 11:05:48,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 11:05:48,523 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:05:48,523 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:05:48,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-21 11:05:48,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-21 11:05:48,729 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:05:48,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:05:48,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1187519891, now seen corresponding path program 1 times [2023-12-21 11:05:48,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:05:48,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943865462] [2023-12-21 11:05:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:48,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:05:48,741 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:05:48,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319971015] [2023-12-21 11:05:48,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:48,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:05:48,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:05:48,742 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:05:48,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-21 11:05:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:05:48,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-21 11:05:48,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:05:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:05:48,919 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 11:05:48,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:05:48,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943865462] [2023-12-21 11:05:48,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:05:48,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319971015] [2023-12-21 11:05:48,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319971015] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:05:48,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:05:48,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 11:05:48,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735370727] [2023-12-21 11:05:48,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:05:48,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 11:05:48,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:05:48,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 11:05:48,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 11:05:48,920 INFO L87 Difference]: Start difference. First operand 88 states and 150 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 11:05:49,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:05:49,061 INFO L93 Difference]: Finished difference Result 151 states and 286 transitions. [2023-12-21 11:05:49,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 11:05:49,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2023-12-21 11:05:49,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:05:49,062 INFO L225 Difference]: With dead ends: 151 [2023-12-21 11:05:49,062 INFO L226 Difference]: Without dead ends: 86 [2023-12-21 11:05:49,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-21 11:05:49,063 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:05:49,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 112 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 11:05:49,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-21 11:05:49,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-12-21 11:05:49,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 66 states have internal predecessors, (69), 14 states have call successors, (14), 7 states have call predecessors, (14), 12 states have return successors, (55), 12 states have call predecessors, (55), 13 states have call successors, (55) [2023-12-21 11:05:49,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 138 transitions. [2023-12-21 11:05:49,073 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 138 transitions. Word has length 40 [2023-12-21 11:05:49,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:05:49,074 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 138 transitions. [2023-12-21 11:05:49,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 11:05:49,074 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 138 transitions. [2023-12-21 11:05:49,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-21 11:05:49,074 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:05:49,074 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:05:49,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-21 11:05:49,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-21 11:05:49,279 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:05:49,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:05:49,279 INFO L85 PathProgramCache]: Analyzing trace with hash -968665173, now seen corresponding path program 1 times [2023-12-21 11:05:49,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:05:49,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577323525] [2023-12-21 11:05:49,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:49,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:05:49,291 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:05:49,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136501760] [2023-12-21 11:05:49,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:49,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:05:49,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:05:49,308 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:05:49,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-21 11:05:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:05:49,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-21 11:05:49,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:05:49,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2023-12-21 11:05:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:05:49,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:05:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:05:49,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:05:49,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577323525] [2023-12-21 11:05:49,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:05:49,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136501760] [2023-12-21 11:05:49,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136501760] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 11:05:49,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:05:49,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 22 [2023-12-21 11:05:49,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548705042] [2023-12-21 11:05:49,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:05:49,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 11:05:49,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:05:49,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 11:05:49,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-12-21 11:05:49,911 INFO L87 Difference]: Start difference. First operand 86 states and 138 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-21 11:05:50,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:05:50,258 INFO L93 Difference]: Finished difference Result 110 states and 208 transitions. [2023-12-21 11:05:50,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 11:05:50,259 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2023-12-21 11:05:50,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:05:50,260 INFO L225 Difference]: With dead ends: 110 [2023-12-21 11:05:50,260 INFO L226 Difference]: Without dead ends: 96 [2023-12-21 11:05:50,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2023-12-21 11:05:50,261 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 48 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 11:05:50,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 69 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 11:05:50,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-21 11:05:50,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2023-12-21 11:05:50,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 69 states have internal predecessors, (72), 14 states have call successors, (14), 7 states have call predecessors, (14), 15 states have return successors, (73), 15 states have call predecessors, (73), 13 states have call successors, (73) [2023-12-21 11:05:50,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 159 transitions. [2023-12-21 11:05:50,275 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 159 transitions. Word has length 40 [2023-12-21 11:05:50,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:05:50,275 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 159 transitions. [2023-12-21 11:05:50,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-21 11:05:50,276 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 159 transitions. [2023-12-21 11:05:50,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-21 11:05:50,276 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:05:50,276 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:05:50,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-21 11:05:50,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-21 11:05:50,482 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:05:50,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:05:50,483 INFO L85 PathProgramCache]: Analyzing trace with hash 14393446, now seen corresponding path program 1 times [2023-12-21 11:05:50,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:05:50,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553024328] [2023-12-21 11:05:50,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:50,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:05:50,497 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:05:50,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920745989] [2023-12-21 11:05:50,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:50,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:05:50,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:05:50,498 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:05:50,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-21 11:05:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:05:50,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 166 conjunts are in the unsatisfiable core [2023-12-21 11:05:50,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:05:50,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:05:50,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:05:50,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:05:50,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:05:50,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:05:50,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:05:50,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:05:50,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:05:51,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2023-12-21 11:05:51,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2023-12-21 11:05:51,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-12-21 11:05:52,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-12-21 11:05:52,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-12-21 11:05:52,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 11:05:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 11:05:52,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:05:55,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:05:55,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553024328] [2023-12-21 11:05:55,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:05:55,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920745989] [2023-12-21 11:05:55,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920745989] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:05:55,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:05:55,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-21 11:05:55,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928820548] [2023-12-21 11:05:55,757 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:05:55,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 11:05:55,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:05:55,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 11:05:55,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2023-12-21 11:05:55,758 INFO L87 Difference]: Start difference. First operand 92 states and 159 transitions. Second operand has 20 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 11:05:57,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:05:57,983 INFO L93 Difference]: Finished difference Result 106 states and 185 transitions. [2023-12-21 11:05:57,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-21 11:05:57,984 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 53 [2023-12-21 11:05:57,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:05:57,985 INFO L225 Difference]: With dead ends: 106 [2023-12-21 11:05:57,985 INFO L226 Difference]: Without dead ends: 104 [2023-12-21 11:05:57,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 11:05:57,986 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-21 11:05:57,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 177 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-21 11:05:57,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-12-21 11:05:57,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2023-12-21 11:05:57,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 69 states have internal predecessors, (72), 14 states have call successors, (14), 7 states have call predecessors, (14), 15 states have return successors, (73), 15 states have call predecessors, (73), 13 states have call successors, (73) [2023-12-21 11:05:57,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 159 transitions. [2023-12-21 11:05:57,998 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 159 transitions. Word has length 53 [2023-12-21 11:05:57,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:05:57,998 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 159 transitions. [2023-12-21 11:05:57,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 11:05:57,998 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 159 transitions. [2023-12-21 11:05:57,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-21 11:05:57,999 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:05:57,999 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:05:58,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-21 11:05:58,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:05:58,205 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:05:58,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:05:58,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1063511988, now seen corresponding path program 1 times [2023-12-21 11:05:58,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:05:58,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157675681] [2023-12-21 11:05:58,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:58,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:05:58,218 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:05:58,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657017041] [2023-12-21 11:05:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:58,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:05:58,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:05:58,219 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:05:58,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-21 11:05:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:05:58,413 WARN L260 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 245 conjunts are in the unsatisfiable core [2023-12-21 11:05:58,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:05:58,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:05:58,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:05:58,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:05:58,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:05:58,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:05:58,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:05:58,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:06:00,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 50 [2023-12-21 11:06:00,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-12-21 11:06:00,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2023-12-21 11:06:00,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2023-12-21 11:06:00,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2023-12-21 11:06:00,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2023-12-21 11:06:00,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-21 11:06:01,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2023-12-21 11:06:01,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2023-12-21 11:06:01,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-21 11:06:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 23 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 11:06:01,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:06:09,646 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:06:09,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 93 [2023-12-21 11:06:10,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:06:10,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157675681] [2023-12-21 11:06:10,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:06:10,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657017041] [2023-12-21 11:06:10,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657017041] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:06:10,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:06:10,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-12-21 11:06:10,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589315410] [2023-12-21 11:06:10,505 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:06:10,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-21 11:06:10,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:06:10,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-21 11:06:10,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2023-12-21 11:06:10,506 INFO L87 Difference]: Start difference. First operand 92 states and 159 transitions. Second operand has 26 states, 20 states have (on average 1.9) internal successors, (38), 22 states have internal predecessors, (38), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 11:06:17,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:06:17,299 INFO L93 Difference]: Finished difference Result 108 states and 194 transitions. [2023-12-21 11:06:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 11:06:17,300 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 1.9) internal successors, (38), 22 states have internal predecessors, (38), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 55 [2023-12-21 11:06:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:06:17,301 INFO L225 Difference]: With dead ends: 108 [2023-12-21 11:06:17,301 INFO L226 Difference]: Without dead ends: 106 [2023-12-21 11:06:17,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=255, Invalid=2097, Unknown=0, NotChecked=0, Total=2352 [2023-12-21 11:06:17,302 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 76 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-12-21 11:06:17,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 183 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-12-21 11:06:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-12-21 11:06:17,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2023-12-21 11:06:17,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 70 states have internal predecessors, (73), 14 states have call successors, (14), 7 states have call predecessors, (14), 16 states have return successors, (81), 16 states have call predecessors, (81), 13 states have call successors, (81) [2023-12-21 11:06:17,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 168 transitions. [2023-12-21 11:06:17,315 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 168 transitions. Word has length 55 [2023-12-21 11:06:17,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:06:17,315 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 168 transitions. [2023-12-21 11:06:17,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 1.9) internal successors, (38), 22 states have internal predecessors, (38), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 11:06:17,315 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 168 transitions. [2023-12-21 11:06:17,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-21 11:06:17,316 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:06:17,316 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:06:17,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-21 11:06:17,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:06:17,522 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:06:17,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:06:17,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1426016974, now seen corresponding path program 1 times [2023-12-21 11:06:17,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:06:17,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840502552] [2023-12-21 11:06:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:06:17,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:06:17,539 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:06:17,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685060666] [2023-12-21 11:06:17,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:06:17,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:06:17,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:06:17,554 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:06:17,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-21 11:06:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:06:17,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-21 11:06:17,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:06:17,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 11:06:17,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:06:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-21 11:06:18,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:06:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 11:06:19,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:06:19,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840502552] [2023-12-21 11:06:19,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:06:19,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685060666] [2023-12-21 11:06:19,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685060666] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 11:06:19,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:06:19,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2023-12-21 11:06:19,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217351241] [2023-12-21 11:06:19,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 11:06:19,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-21 11:06:19,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:06:19,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-21 11:06:19,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2023-12-21 11:06:19,203 INFO L87 Difference]: Start difference. First operand 94 states and 168 transitions. Second operand has 29 states, 25 states have (on average 2.16) internal successors, (54), 26 states have internal predecessors, (54), 10 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 11:06:20,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:06:20,996 INFO L93 Difference]: Finished difference Result 164 states and 392 transitions. [2023-12-21 11:06:20,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-21 11:06:20,997 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.16) internal successors, (54), 26 states have internal predecessors, (54), 10 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) Word has length 55 [2023-12-21 11:06:20,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:06:20,998 INFO L225 Difference]: With dead ends: 164 [2023-12-21 11:06:20,998 INFO L226 Difference]: Without dead ends: 146 [2023-12-21 11:06:20,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=294, Invalid=1598, Unknown=0, NotChecked=0, Total=1892 [2023-12-21 11:06:20,999 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 86 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:06:20,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 156 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-21 11:06:21,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-12-21 11:06:21,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 96. [2023-12-21 11:06:21,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 64 states have (on average 1.15625) internal successors, (74), 71 states have internal predecessors, (74), 14 states have call successors, (14), 7 states have call predecessors, (14), 17 states have return successors, (82), 17 states have call predecessors, (82), 13 states have call successors, (82) [2023-12-21 11:06:21,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 170 transitions. [2023-12-21 11:06:21,024 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 170 transitions. Word has length 55 [2023-12-21 11:06:21,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:06:21,024 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 170 transitions. [2023-12-21 11:06:21,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.16) internal successors, (54), 26 states have internal predecessors, (54), 10 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 11:06:21,024 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 170 transitions. [2023-12-21 11:06:21,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-21 11:06:21,025 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:06:21,025 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:06:21,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-21 11:06:21,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:06:21,231 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:06:21,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:06:21,231 INFO L85 PathProgramCache]: Analyzing trace with hash 720490764, now seen corresponding path program 1 times [2023-12-21 11:06:21,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:06:21,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564227145] [2023-12-21 11:06:21,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:06:21,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:06:21,248 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:06:21,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92608739] [2023-12-21 11:06:21,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:06:21,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:06:21,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:06:21,249 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:06:21,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-21 11:06:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:06:21,473 WARN L260 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 253 conjunts are in the unsatisfiable core [2023-12-21 11:06:21,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:06:21,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:06:21,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:06:21,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:06:21,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:06:21,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:06:21,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:06:21,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:06:21,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:06:26,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-12-21 11:06:26,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2023-12-21 11:06:26,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2023-12-21 11:06:26,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 11:06:26,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-12-21 11:06:26,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-12-21 11:06:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 11:06:26,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:06:45,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:06:45,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564227145] [2023-12-21 11:06:45,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:06:45,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92608739] [2023-12-21 11:06:45,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92608739] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:06:45,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:06:45,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-12-21 11:06:45,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279968945] [2023-12-21 11:06:45,350 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:06:45,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-21 11:06:45,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:06:45,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-21 11:06:45,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2023-12-21 11:06:45,351 INFO L87 Difference]: Start difference. First operand 96 states and 170 transitions. Second operand has 25 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 11:06:53,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:06:53,526 INFO L93 Difference]: Finished difference Result 116 states and 218 transitions. [2023-12-21 11:06:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 11:06:53,527 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 55 [2023-12-21 11:06:53,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:06:53,528 INFO L225 Difference]: With dead ends: 116 [2023-12-21 11:06:53,528 INFO L226 Difference]: Without dead ends: 114 [2023-12-21 11:06:53,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=225, Invalid=1845, Unknown=0, NotChecked=0, Total=2070 [2023-12-21 11:06:53,529 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-12-21 11:06:53,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 180 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-12-21 11:06:53,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-21 11:06:53,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2023-12-21 11:06:53,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 64 states have (on average 1.15625) internal successors, (74), 71 states have internal predecessors, (74), 14 states have call successors, (14), 7 states have call predecessors, (14), 17 states have return successors, (82), 17 states have call predecessors, (82), 13 states have call successors, (82) [2023-12-21 11:06:53,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 170 transitions. [2023-12-21 11:06:53,545 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 170 transitions. Word has length 55 [2023-12-21 11:06:53,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:06:53,545 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 170 transitions. [2023-12-21 11:06:53,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 11:06:53,545 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 170 transitions. [2023-12-21 11:06:53,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-21 11:06:53,546 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:06:53,546 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:06:53,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-21 11:06:53,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:06:53,755 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:06:53,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:06:53,755 INFO L85 PathProgramCache]: Analyzing trace with hash 133684750, now seen corresponding path program 1 times [2023-12-21 11:06:53,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:06:53,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715608650] [2023-12-21 11:06:53,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:06:53,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:06:53,768 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:06:53,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610375183] [2023-12-21 11:06:53,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:06:53,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:06:53,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:06:53,769 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:06:53,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-21 11:06:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:06:53,984 WARN L260 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 237 conjunts are in the unsatisfiable core [2023-12-21 11:06:53,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:06:53,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:06:53,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:06:54,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:06:54,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:06:54,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:06:54,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:06:54,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-21 11:06:55,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-21 11:06:55,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-21 11:06:55,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2023-12-21 11:06:55,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2023-12-21 11:06:55,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-21 11:06:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-21 11:06:55,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:06:58,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:06:58,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2023-12-21 11:06:59,780 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:06:59,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2023-12-21 11:07:00,479 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:07:00,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2023-12-21 11:07:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-21 11:07:02,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:02,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715608650] [2023-12-21 11:07:02,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:02,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610375183] [2023-12-21 11:07:02,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610375183] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 11:07:02,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:07:02,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17] total 38 [2023-12-21 11:07:02,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883993407] [2023-12-21 11:07:02,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:02,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-21 11:07:02,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:02,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-21 11:07:02,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2023-12-21 11:07:02,785 INFO L87 Difference]: Start difference. First operand 96 states and 170 transitions. Second operand has 38 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 11 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-21 11:07:09,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:09,624 INFO L93 Difference]: Finished difference Result 120 states and 230 transitions. [2023-12-21 11:07:09,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-21 11:07:09,625 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 11 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 55 [2023-12-21 11:07:09,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:09,626 INFO L225 Difference]: With dead ends: 120 [2023-12-21 11:07:09,626 INFO L226 Difference]: Without dead ends: 116 [2023-12-21 11:07:09,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=542, Invalid=3748, Unknown=0, NotChecked=0, Total=4290 [2023-12-21 11:07:09,627 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 78 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 47 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:09,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 215 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1243 Invalid, 2 Unknown, 0 Unchecked, 3.6s Time] [2023-12-21 11:07:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-12-21 11:07:09,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 86. [2023-12-21 11:07:09,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.152542372881356) internal successors, (68), 65 states have internal predecessors, (68), 13 states have call successors, (13), 7 states have call predecessors, (13), 13 states have return successors, (58), 13 states have call predecessors, (58), 12 states have call successors, (58) [2023-12-21 11:07:09,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 139 transitions. [2023-12-21 11:07:09,641 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 139 transitions. Word has length 55 [2023-12-21 11:07:09,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:09,641 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 139 transitions. [2023-12-21 11:07:09,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 31 states have (on average 2.225806451612903) internal successors, (69), 31 states have internal predecessors, (69), 11 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2023-12-21 11:07:09,641 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 139 transitions. [2023-12-21 11:07:09,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-21 11:07:09,642 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:09,642 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:09,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-21 11:07:09,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:09,848 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:09,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:09,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1360022093, now seen corresponding path program 1 times [2023-12-21 11:07:09,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:09,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421191426] [2023-12-21 11:07:09,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:09,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:09,863 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:09,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386417146] [2023-12-21 11:07:09,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:09,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:09,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:09,865 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:07:09,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-21 11:07:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:10,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-21 11:07:10,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:10,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 11:07:10,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:07:10,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-21 11:07:10,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-21 11:07:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:07:10,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:10,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:10,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421191426] [2023-12-21 11:07:10,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:10,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386417146] [2023-12-21 11:07:10,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386417146] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:07:10,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:07:10,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-12-21 11:07:10,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418761527] [2023-12-21 11:07:10,635 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:10,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 11:07:10,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:10,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 11:07:10,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2023-12-21 11:07:10,636 INFO L87 Difference]: Start difference. First operand 86 states and 139 transitions. Second operand has 22 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 11:07:11,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:11,404 INFO L93 Difference]: Finished difference Result 98 states and 150 transitions. [2023-12-21 11:07:11,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 11:07:11,405 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 44 [2023-12-21 11:07:11,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:11,406 INFO L225 Difference]: With dead ends: 98 [2023-12-21 11:07:11,406 INFO L226 Difference]: Without dead ends: 86 [2023-12-21 11:07:11,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2023-12-21 11:07:11,407 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 17 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:11,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 136 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 614 Invalid, 7 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 11:07:11,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-21 11:07:11,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-12-21 11:07:11,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.152542372881356) internal successors, (68), 65 states have internal predecessors, (68), 13 states have call successors, (13), 7 states have call predecessors, (13), 13 states have return successors, (57), 13 states have call predecessors, (57), 12 states have call successors, (57) [2023-12-21 11:07:11,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 138 transitions. [2023-12-21 11:07:11,420 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 138 transitions. Word has length 44 [2023-12-21 11:07:11,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:11,420 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 138 transitions. [2023-12-21 11:07:11,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 11:07:11,420 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 138 transitions. [2023-12-21 11:07:11,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-21 11:07:11,421 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:11,421 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:11,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-21 11:07:11,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:11,627 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:11,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:11,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1613946227, now seen corresponding path program 1 times [2023-12-21 11:07:11,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:11,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661550555] [2023-12-21 11:07:11,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:11,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:11,639 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:11,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298355502] [2023-12-21 11:07:11,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:11,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:11,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:11,640 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:07:11,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-21 11:07:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:11,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 77 conjunts are in the unsatisfiable core [2023-12-21 11:07:11,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:11,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 11:07:11,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:07:12,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-21 11:07:12,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-21 11:07:12,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-21 11:07:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:07:12,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:12,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:12,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661550555] [2023-12-21 11:07:12,684 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:12,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298355502] [2023-12-21 11:07:12,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298355502] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:07:12,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:07:12,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-12-21 11:07:12,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012908369] [2023-12-21 11:07:12,685 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:12,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-21 11:07:12,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:12,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-21 11:07:12,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2023-12-21 11:07:12,686 INFO L87 Difference]: Start difference. First operand 86 states and 138 transitions. Second operand has 23 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 11:07:13,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:13,750 INFO L93 Difference]: Finished difference Result 102 states and 166 transitions. [2023-12-21 11:07:13,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 11:07:13,751 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 46 [2023-12-21 11:07:13,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:13,751 INFO L225 Difference]: With dead ends: 102 [2023-12-21 11:07:13,751 INFO L226 Difference]: Without dead ends: 90 [2023-12-21 11:07:13,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2023-12-21 11:07:13,752 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 58 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 17 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:13,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 132 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 904 Invalid, 6 Unknown, 0 Unchecked, 0.7s Time] [2023-12-21 11:07:13,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-21 11:07:13,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2023-12-21 11:07:13,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.15) internal successors, (69), 66 states have internal predecessors, (69), 13 states have call successors, (13), 7 states have call predecessors, (13), 14 states have return successors, (64), 14 states have call predecessors, (64), 12 states have call successors, (64) [2023-12-21 11:07:13,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 146 transitions. [2023-12-21 11:07:13,765 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 146 transitions. Word has length 46 [2023-12-21 11:07:13,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:13,765 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 146 transitions. [2023-12-21 11:07:13,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 11:07:13,765 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 146 transitions. [2023-12-21 11:07:13,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-21 11:07:13,766 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:13,766 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:13,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-21 11:07:13,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-21 11:07:13,973 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:13,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:13,973 INFO L85 PathProgramCache]: Analyzing trace with hash -51936077, now seen corresponding path program 1 times [2023-12-21 11:07:13,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:13,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616503889] [2023-12-21 11:07:13,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:13,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:13,986 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:13,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605247714] [2023-12-21 11:07:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:13,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:13,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:13,988 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:07:13,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-21 11:07:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:14,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-21 11:07:14,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:14,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:07:14,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:07:14,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-21 11:07:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-21 11:07:14,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:14,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:14,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616503889] [2023-12-21 11:07:14,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:14,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605247714] [2023-12-21 11:07:14,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605247714] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:07:14,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:07:14,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-12-21 11:07:14,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719147940] [2023-12-21 11:07:14,984 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:14,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 11:07:14,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:14,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 11:07:14,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2023-12-21 11:07:14,985 INFO L87 Difference]: Start difference. First operand 88 states and 146 transitions. Second operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 11:07:15,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:15,538 INFO L93 Difference]: Finished difference Result 120 states and 206 transitions. [2023-12-21 11:07:15,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 11:07:15,539 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2023-12-21 11:07:15,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:15,539 INFO L225 Difference]: With dead ends: 120 [2023-12-21 11:07:15,539 INFO L226 Difference]: Without dead ends: 92 [2023-12-21 11:07:15,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2023-12-21 11:07:15,540 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 18 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:15,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 216 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 567 Invalid, 3 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 11:07:15,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-21 11:07:15,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2023-12-21 11:07:15,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.15) internal successors, (69), 66 states have internal predecessors, (69), 13 states have call successors, (13), 7 states have call predecessors, (13), 14 states have return successors, (63), 14 states have call predecessors, (63), 12 states have call successors, (63) [2023-12-21 11:07:15,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 145 transitions. [2023-12-21 11:07:15,553 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 145 transitions. Word has length 46 [2023-12-21 11:07:15,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:15,553 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 145 transitions. [2023-12-21 11:07:15,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 11:07:15,553 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 145 transitions. [2023-12-21 11:07:15,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-21 11:07:15,554 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:15,554 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:15,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-21 11:07:15,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-21 11:07:15,760 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:15,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:15,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1636578481, now seen corresponding path program 1 times [2023-12-21 11:07:15,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:15,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710372459] [2023-12-21 11:07:15,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:15,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:15,772 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:15,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027116972] [2023-12-21 11:07:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:15,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:15,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:15,773 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:07:15,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-21 11:07:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:15,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-21 11:07:15,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:16,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 11:07:16,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:07:16,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2023-12-21 11:07:16,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-21 11:07:16,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-12-21 11:07:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 11:07:16,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:16,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:16,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710372459] [2023-12-21 11:07:16,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:16,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027116972] [2023-12-21 11:07:16,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027116972] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:07:16,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:07:16,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-12-21 11:07:16,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667329878] [2023-12-21 11:07:16,816 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:16,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 11:07:16,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:16,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 11:07:16,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2023-12-21 11:07:16,818 INFO L87 Difference]: Start difference. First operand 88 states and 145 transitions. Second operand has 24 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 11:07:18,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:18,051 INFO L93 Difference]: Finished difference Result 102 states and 165 transitions. [2023-12-21 11:07:18,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-21 11:07:18,052 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 46 [2023-12-21 11:07:18,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:18,053 INFO L225 Difference]: With dead ends: 102 [2023-12-21 11:07:18,053 INFO L226 Difference]: Without dead ends: 90 [2023-12-21 11:07:18,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=248, Invalid=2008, Unknown=0, NotChecked=0, Total=2256 [2023-12-21 11:07:18,054 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 58 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 24 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:18,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 132 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 728 Invalid, 8 Unknown, 0 Unchecked, 0.7s Time] [2023-12-21 11:07:18,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-21 11:07:18,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2023-12-21 11:07:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 60 states have (on average 1.15) internal successors, (69), 66 states have internal predecessors, (69), 13 states have call successors, (13), 7 states have call predecessors, (13), 14 states have return successors, (63), 14 states have call predecessors, (63), 12 states have call successors, (63) [2023-12-21 11:07:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 145 transitions. [2023-12-21 11:07:18,066 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 145 transitions. Word has length 46 [2023-12-21 11:07:18,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:18,066 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 145 transitions. [2023-12-21 11:07:18,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 11:07:18,066 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 145 transitions. [2023-12-21 11:07:18,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-21 11:07:18,067 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:18,067 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:18,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-21 11:07:18,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-21 11:07:18,282 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:18,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:18,283 INFO L85 PathProgramCache]: Analyzing trace with hash 25598325, now seen corresponding path program 1 times [2023-12-21 11:07:18,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:18,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000773314] [2023-12-21 11:07:18,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:18,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:18,297 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:18,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024229933] [2023-12-21 11:07:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:18,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:18,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:18,298 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:07:18,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-21 11:07:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:18,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-21 11:07:18,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:18,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-21 11:07:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:07:18,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:19,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:19,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000773314] [2023-12-21 11:07:19,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:19,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024229933] [2023-12-21 11:07:19,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024229933] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:07:19,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:07:19,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-12-21 11:07:19,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40109654] [2023-12-21 11:07:19,028 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:19,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 11:07:19,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:19,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 11:07:19,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-12-21 11:07:19,029 INFO L87 Difference]: Start difference. First operand 88 states and 145 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-21 11:07:19,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:19,388 INFO L93 Difference]: Finished difference Result 110 states and 195 transitions. [2023-12-21 11:07:19,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-21 11:07:19,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2023-12-21 11:07:19,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:19,389 INFO L225 Difference]: With dead ends: 110 [2023-12-21 11:07:19,389 INFO L226 Difference]: Without dead ends: 83 [2023-12-21 11:07:19,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=679, Unknown=1, NotChecked=0, Total=812 [2023-12-21 11:07:19,390 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 9 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:19,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 147 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 374 Invalid, 6 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 11:07:19,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-21 11:07:19,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2023-12-21 11:07:19,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 12 states have call successors, (12), 7 states have call predecessors, (12), 10 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2023-12-21 11:07:19,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 112 transitions. [2023-12-21 11:07:19,403 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 112 transitions. Word has length 46 [2023-12-21 11:07:19,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:19,404 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 112 transitions. [2023-12-21 11:07:19,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-21 11:07:19,404 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 112 transitions. [2023-12-21 11:07:19,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-21 11:07:19,405 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:19,405 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:19,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-21 11:07:19,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-21 11:07:19,611 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:19,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:19,611 INFO L85 PathProgramCache]: Analyzing trace with hash -864815980, now seen corresponding path program 1 times [2023-12-21 11:07:19,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:19,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471496254] [2023-12-21 11:07:19,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:19,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:19,626 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:19,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144670799] [2023-12-21 11:07:19,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:19,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:19,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:19,627 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:07:19,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-21 11:07:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:19,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-21 11:07:19,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:19,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-21 11:07:19,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:07:20,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2023-12-21 11:07:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-21 11:07:20,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:21,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:21,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471496254] [2023-12-21 11:07:21,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:21,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144670799] [2023-12-21 11:07:21,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144670799] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:07:21,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:07:21,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-21 11:07:21,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140018751] [2023-12-21 11:07:21,137 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:21,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 11:07:21,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:21,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 11:07:21,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2023-12-21 11:07:21,138 INFO L87 Difference]: Start difference. First operand 76 states and 112 transitions. Second operand has 20 states, 17 states have (on average 2.0) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 11:07:21,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:21,876 INFO L93 Difference]: Finished difference Result 112 states and 181 transitions. [2023-12-21 11:07:21,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-21 11:07:21,876 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 61 [2023-12-21 11:07:21,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:21,877 INFO L225 Difference]: With dead ends: 112 [2023-12-21 11:07:21,877 INFO L226 Difference]: Without dead ends: 80 [2023-12-21 11:07:21,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2023-12-21 11:07:21,878 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:21,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 174 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 11:07:21,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-21 11:07:21,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2023-12-21 11:07:21,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 12 states have call successors, (12), 7 states have call predecessors, (12), 10 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2023-12-21 11:07:21,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 112 transitions. [2023-12-21 11:07:21,895 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 112 transitions. Word has length 61 [2023-12-21 11:07:21,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:21,895 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 112 transitions. [2023-12-21 11:07:21,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 11:07:21,895 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 112 transitions. [2023-12-21 11:07:21,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-21 11:07:21,896 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:21,896 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:21,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-21 11:07:22,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-21 11:07:22,104 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:22,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:22,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1974723244, now seen corresponding path program 1 times [2023-12-21 11:07:22,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:22,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261045202] [2023-12-21 11:07:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:22,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:22,141 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:22,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119263424] [2023-12-21 11:07:22,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:22,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:22,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:22,142 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:07:22,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-21 11:07:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:22,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 105 conjunts are in the unsatisfiable core [2023-12-21 11:07:22,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:22,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 11:07:22,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:07:22,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-21 11:07:23,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2023-12-21 11:07:23,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-21 11:07:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-21 11:07:23,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:23,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:23,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261045202] [2023-12-21 11:07:23,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:23,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119263424] [2023-12-21 11:07:23,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119263424] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:07:23,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:07:23,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-12-21 11:07:23,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945795729] [2023-12-21 11:07:23,576 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:23,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 11:07:23,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:23,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 11:07:23,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2023-12-21 11:07:23,577 INFO L87 Difference]: Start difference. First operand 76 states and 112 transitions. Second operand has 27 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 11:07:24,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:24,895 INFO L93 Difference]: Finished difference Result 95 states and 150 transitions. [2023-12-21 11:07:24,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-21 11:07:24,895 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 61 [2023-12-21 11:07:24,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:24,896 INFO L225 Difference]: With dead ends: 95 [2023-12-21 11:07:24,896 INFO L226 Difference]: Without dead ends: 83 [2023-12-21 11:07:24,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=209, Invalid=1953, Unknown=0, NotChecked=0, Total=2162 [2023-12-21 11:07:24,897 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 22 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:24,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 130 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 862 Invalid, 1 Unknown, 0 Unchecked, 0.8s Time] [2023-12-21 11:07:24,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-21 11:07:24,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2023-12-21 11:07:24,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 61 states have internal predecessors, (64), 13 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (52), 12 states have call predecessors, (52), 12 states have call successors, (52) [2023-12-21 11:07:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 129 transitions. [2023-12-21 11:07:24,910 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 129 transitions. Word has length 61 [2023-12-21 11:07:24,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:24,910 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 129 transitions. [2023-12-21 11:07:24,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 11:07:24,910 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 129 transitions. [2023-12-21 11:07:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-21 11:07:24,911 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:24,911 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:24,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-21 11:07:25,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:25,118 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:25,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:25,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1699963630, now seen corresponding path program 1 times [2023-12-21 11:07:25,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:25,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932503573] [2023-12-21 11:07:25,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:25,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:25,133 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:25,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622269317] [2023-12-21 11:07:25,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:25,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:25,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:25,135 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:07:25,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-21 11:07:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:25,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 81 conjunts are in the unsatisfiable core [2023-12-21 11:07:25,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:25,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2023-12-21 11:07:25,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-12-21 11:07:26,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-12-21 11:07:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 11:07:26,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:26,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:26,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932503573] [2023-12-21 11:07:26,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:26,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622269317] [2023-12-21 11:07:26,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622269317] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:07:26,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:07:26,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-12-21 11:07:26,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119858642] [2023-12-21 11:07:26,256 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:26,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 11:07:26,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:26,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 11:07:26,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2023-12-21 11:07:26,257 INFO L87 Difference]: Start difference. First operand 81 states and 129 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-21 11:07:27,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:27,357 INFO L93 Difference]: Finished difference Result 101 states and 170 transitions. [2023-12-21 11:07:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 11:07:27,357 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 61 [2023-12-21 11:07:27,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:27,358 INFO L225 Difference]: With dead ends: 101 [2023-12-21 11:07:27,358 INFO L226 Difference]: Without dead ends: 81 [2023-12-21 11:07:27,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2023-12-21 11:07:27,359 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 10 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:27,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 143 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 719 Invalid, 6 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 11:07:27,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-12-21 11:07:27,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-12-21 11:07:27,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 61 states have internal predecessors, (64), 13 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (51), 12 states have call predecessors, (51), 12 states have call successors, (51) [2023-12-21 11:07:27,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 128 transitions. [2023-12-21 11:07:27,371 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 128 transitions. Word has length 61 [2023-12-21 11:07:27,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:27,371 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 128 transitions. [2023-12-21 11:07:27,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-21 11:07:27,371 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 128 transitions. [2023-12-21 11:07:27,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-21 11:07:27,372 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:27,372 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:27,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-21 11:07:27,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:27,578 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:27,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:27,579 INFO L85 PathProgramCache]: Analyzing trace with hash 2136259686, now seen corresponding path program 1 times [2023-12-21 11:07:27,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:27,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789318320] [2023-12-21 11:07:27,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:27,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:27,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:27,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070818327] [2023-12-21 11:07:27,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:27,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:27,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:27,593 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:07:27,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-21 11:07:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:27,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-21 11:07:27,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:27,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-12-21 11:07:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 33 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 11:07:28,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 11:07:28,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:28,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789318320] [2023-12-21 11:07:28,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:28,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070818327] [2023-12-21 11:07:28,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070818327] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 11:07:28,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:07:28,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2023-12-21 11:07:28,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258795699] [2023-12-21 11:07:28,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:28,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 11:07:28,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:28,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 11:07:28,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-12-21 11:07:28,410 INFO L87 Difference]: Start difference. First operand 81 states and 128 transitions. Second operand has 18 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 7 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-21 11:07:29,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:29,012 INFO L93 Difference]: Finished difference Result 119 states and 236 transitions. [2023-12-21 11:07:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 11:07:29,012 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 7 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 65 [2023-12-21 11:07:29,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:29,014 INFO L225 Difference]: With dead ends: 119 [2023-12-21 11:07:29,014 INFO L226 Difference]: Without dead ends: 97 [2023-12-21 11:07:29,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2023-12-21 11:07:29,014 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 47 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:29,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 101 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 11:07:29,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-21 11:07:29,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2023-12-21 11:07:29,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 63 states have internal predecessors, (66), 13 states have call successors, (13), 7 states have call predecessors, (13), 13 states have return successors, (57), 14 states have call predecessors, (57), 12 states have call successors, (57) [2023-12-21 11:07:29,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 136 transitions. [2023-12-21 11:07:29,028 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 136 transitions. Word has length 65 [2023-12-21 11:07:29,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:29,028 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 136 transitions. [2023-12-21 11:07:29,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 7 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-21 11:07:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 136 transitions. [2023-12-21 11:07:29,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-21 11:07:29,030 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:29,031 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:29,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-21 11:07:29,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:29,237 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:29,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:29,237 INFO L85 PathProgramCache]: Analyzing trace with hash -772504216, now seen corresponding path program 1 times [2023-12-21 11:07:29,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:29,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036311297] [2023-12-21 11:07:29,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:29,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:29,250 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:29,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367730044] [2023-12-21 11:07:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:29,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:29,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:29,252 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:07:29,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-21 11:07:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:29,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-21 11:07:29,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:29,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-21 11:07:29,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:07:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-21 11:07:29,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-21 11:07:30,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:30,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036311297] [2023-12-21 11:07:30,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:30,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367730044] [2023-12-21 11:07:30,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367730044] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 11:07:30,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:07:30,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2023-12-21 11:07:30,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408112088] [2023-12-21 11:07:30,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:30,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 11:07:30,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:30,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 11:07:30,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-12-21 11:07:30,538 INFO L87 Difference]: Start difference. First operand 85 states and 136 transitions. Second operand has 24 states, 20 states have (on average 3.15) internal successors, (63), 21 states have internal predecessors, (63), 10 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-21 11:07:32,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:32,357 INFO L93 Difference]: Finished difference Result 242 states and 549 transitions. [2023-12-21 11:07:32,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-21 11:07:32,357 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 3.15) internal successors, (63), 21 states have internal predecessors, (63), 10 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 10 states have call successors, (11) Word has length 65 [2023-12-21 11:07:32,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:32,369 INFO L225 Difference]: With dead ends: 242 [2023-12-21 11:07:32,369 INFO L226 Difference]: Without dead ends: 180 [2023-12-21 11:07:32,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=323, Invalid=1657, Unknown=0, NotChecked=0, Total=1980 [2023-12-21 11:07:32,371 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 138 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:32,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 266 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-21 11:07:32,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-12-21 11:07:32,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 140. [2023-12-21 11:07:32,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 98 states have (on average 1.163265306122449) internal successors, (114), 110 states have internal predecessors, (114), 22 states have call successors, (22), 9 states have call predecessors, (22), 19 states have return successors, (89), 20 states have call predecessors, (89), 21 states have call successors, (89) [2023-12-21 11:07:32,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 225 transitions. [2023-12-21 11:07:32,395 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 225 transitions. Word has length 65 [2023-12-21 11:07:32,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:32,395 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 225 transitions. [2023-12-21 11:07:32,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 3.15) internal successors, (63), 21 states have internal predecessors, (63), 10 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-21 11:07:32,395 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 225 transitions. [2023-12-21 11:07:32,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-21 11:07:32,396 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:32,396 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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 11:07:32,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-21 11:07:32,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-12-21 11:07:32,602 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:32,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:32,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1026352422, now seen corresponding path program 2 times [2023-12-21 11:07:32,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:32,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397356077] [2023-12-21 11:07:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:32,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:32,615 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:32,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911205743] [2023-12-21 11:07:32,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 11:07:32,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:32,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:32,619 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:07:32,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-21 11:07:32,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 11:07:32,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:07:32,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-21 11:07:32,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:32,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-12-21 11:07:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-21 11:07:33,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-21 11:07:33,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:33,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397356077] [2023-12-21 11:07:33,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:33,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911205743] [2023-12-21 11:07:33,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911205743] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 11:07:33,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:07:33,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-12-21 11:07:33,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965850838] [2023-12-21 11:07:33,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:33,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 11:07:33,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:33,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 11:07:33,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2023-12-21 11:07:33,558 INFO L87 Difference]: Start difference. First operand 140 states and 225 transitions. Second operand has 24 states, 20 states have (on average 3.6) internal successors, (72), 21 states have internal predecessors, (72), 11 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 8 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-21 11:07:34,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:34,032 INFO L93 Difference]: Finished difference Result 180 states and 333 transitions. [2023-12-21 11:07:34,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 11:07:34,036 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 3.6) internal successors, (72), 21 states have internal predecessors, (72), 11 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 8 states have call predecessors, (13), 11 states have call successors, (13) Word has length 65 [2023-12-21 11:07:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:34,039 INFO L225 Difference]: With dead ends: 180 [2023-12-21 11:07:34,039 INFO L226 Difference]: Without dead ends: 148 [2023-12-21 11:07:34,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=856, Unknown=0, NotChecked=0, Total=1056 [2023-12-21 11:07:34,039 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:34,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 112 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 11:07:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-12-21 11:07:34,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2023-12-21 11:07:34,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 113 states have internal predecessors, (117), 22 states have call successors, (22), 9 states have call predecessors, (22), 22 states have return successors, (94), 23 states have call predecessors, (94), 21 states have call successors, (94) [2023-12-21 11:07:34,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 233 transitions. [2023-12-21 11:07:34,064 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 233 transitions. Word has length 65 [2023-12-21 11:07:34,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:34,064 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 233 transitions. [2023-12-21 11:07:34,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 3.6) internal successors, (72), 21 states have internal predecessors, (72), 11 states have call successors, (14), 5 states have call predecessors, (14), 6 states have return successors, (13), 8 states have call predecessors, (13), 11 states have call successors, (13) [2023-12-21 11:07:34,065 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 233 transitions. [2023-12-21 11:07:34,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-21 11:07:34,065 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:34,065 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:34,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-21 11:07:34,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:34,272 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:34,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:34,272 INFO L85 PathProgramCache]: Analyzing trace with hash 2120740968, now seen corresponding path program 1 times [2023-12-21 11:07:34,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:34,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933497706] [2023-12-21 11:07:34,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:34,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:34,285 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:34,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971383230] [2023-12-21 11:07:34,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:34,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:34,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:34,286 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:07:34,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-21 11:07:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:34,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 65 conjunts are in the unsatisfiable core [2023-12-21 11:07:34,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:34,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2023-12-21 11:07:35,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-12-21 11:07:35,107 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-21 11:07:35,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:35,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:35,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933497706] [2023-12-21 11:07:35,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:35,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971383230] [2023-12-21 11:07:35,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971383230] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:07:35,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:07:35,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-12-21 11:07:35,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526228648] [2023-12-21 11:07:35,211 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:35,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 11:07:35,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:35,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 11:07:35,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2023-12-21 11:07:35,211 INFO L87 Difference]: Start difference. First operand 146 states and 233 transitions. Second operand has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-21 11:07:36,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:36,141 INFO L93 Difference]: Finished difference Result 174 states and 303 transitions. [2023-12-21 11:07:36,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-21 11:07:36,141 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 65 [2023-12-21 11:07:36,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:36,143 INFO L225 Difference]: With dead ends: 174 [2023-12-21 11:07:36,143 INFO L226 Difference]: Without dead ends: 148 [2023-12-21 11:07:36,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=1236, Unknown=0, NotChecked=0, Total=1406 [2023-12-21 11:07:36,144 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 10 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:36,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 138 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 586 Invalid, 5 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 11:07:36,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-12-21 11:07:36,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2023-12-21 11:07:36,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 102 states have (on average 1.1568627450980393) internal successors, (118), 114 states have internal predecessors, (118), 22 states have call successors, (22), 9 states have call predecessors, (22), 23 states have return successors, (96), 24 states have call predecessors, (96), 21 states have call successors, (96) [2023-12-21 11:07:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 236 transitions. [2023-12-21 11:07:36,175 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 236 transitions. Word has length 65 [2023-12-21 11:07:36,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:36,175 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 236 transitions. [2023-12-21 11:07:36,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-21 11:07:36,175 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 236 transitions. [2023-12-21 11:07:36,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-21 11:07:36,176 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:36,177 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:36,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-12-21 11:07:36,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-21 11:07:36,384 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:36,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:36,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1464235494, now seen corresponding path program 2 times [2023-12-21 11:07:36,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:36,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554429978] [2023-12-21 11:07:36,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:36,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:36,399 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:36,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547865517] [2023-12-21 11:07:36,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 11:07:36,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:36,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:36,400 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:07:36,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-21 11:07:36,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 11:07:36,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:07:36,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-21 11:07:36,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:36,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:07:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 11:07:36,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 11:07:37,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:37,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554429978] [2023-12-21 11:07:37,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:37,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547865517] [2023-12-21 11:07:37,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547865517] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 11:07:37,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:07:37,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-12-21 11:07:37,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084471994] [2023-12-21 11:07:37,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:37,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 11:07:37,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:37,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 11:07:37,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-12-21 11:07:37,193 INFO L87 Difference]: Start difference. First operand 148 states and 236 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 12 states have internal predecessors, (57), 8 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 8 states have call successors, (10) [2023-12-21 11:07:37,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:37,736 INFO L93 Difference]: Finished difference Result 196 states and 385 transitions. [2023-12-21 11:07:37,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-21 11:07:37,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 12 states have internal predecessors, (57), 8 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 8 states have call successors, (10) Word has length 65 [2023-12-21 11:07:37,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:37,749 INFO L225 Difference]: With dead ends: 196 [2023-12-21 11:07:37,750 INFO L226 Difference]: Without dead ends: 166 [2023-12-21 11:07:37,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2023-12-21 11:07:37,750 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:37,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 99 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 11:07:37,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-12-21 11:07:37,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 148. [2023-12-21 11:07:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 102 states have (on average 1.1568627450980393) internal successors, (118), 114 states have internal predecessors, (118), 22 states have call successors, (22), 9 states have call predecessors, (22), 23 states have return successors, (97), 24 states have call predecessors, (97), 21 states have call successors, (97) [2023-12-21 11:07:37,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 237 transitions. [2023-12-21 11:07:37,772 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 237 transitions. Word has length 65 [2023-12-21 11:07:37,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:37,772 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 237 transitions. [2023-12-21 11:07:37,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 12 states have internal predecessors, (57), 8 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 8 states have call successors, (10) [2023-12-21 11:07:37,772 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 237 transitions. [2023-12-21 11:07:37,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-21 11:07:37,773 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:37,773 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:37,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-12-21 11:07:37,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:37,980 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:37,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:37,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1010833704, now seen corresponding path program 1 times [2023-12-21 11:07:37,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:37,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657368667] [2023-12-21 11:07:37,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:37,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:37,994 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:37,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717863926] [2023-12-21 11:07:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:37,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:37,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:37,995 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:07:38,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-21 11:07:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:38,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-21 11:07:38,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:38,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2023-12-21 11:07:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 11:07:38,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 11:07:38,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:38,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657368667] [2023-12-21 11:07:38,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:38,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717863926] [2023-12-21 11:07:38,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717863926] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 11:07:38,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:07:38,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2023-12-21 11:07:38,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675830083] [2023-12-21 11:07:38,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:38,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 11:07:38,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:38,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 11:07:38,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-12-21 11:07:38,733 INFO L87 Difference]: Start difference. First operand 148 states and 237 transitions. Second operand has 18 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 7 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-21 11:07:39,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:39,283 INFO L93 Difference]: Finished difference Result 234 states and 503 transitions. [2023-12-21 11:07:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 11:07:39,284 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 7 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 65 [2023-12-21 11:07:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:39,286 INFO L225 Difference]: With dead ends: 234 [2023-12-21 11:07:39,286 INFO L226 Difference]: Without dead ends: 195 [2023-12-21 11:07:39,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2023-12-21 11:07:39,287 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 46 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:39,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 98 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 11:07:39,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-12-21 11:07:39,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 167. [2023-12-21 11:07:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 111 states have (on average 1.1261261261261262) internal successors, (125), 121 states have internal predecessors, (125), 20 states have call successors, (20), 9 states have call predecessors, (20), 35 states have return successors, (146), 36 states have call predecessors, (146), 19 states have call successors, (146) [2023-12-21 11:07:39,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 291 transitions. [2023-12-21 11:07:39,310 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 291 transitions. Word has length 65 [2023-12-21 11:07:39,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:39,310 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 291 transitions. [2023-12-21 11:07:39,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 7 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-21 11:07:39,310 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 291 transitions. [2023-12-21 11:07:39,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-21 11:07:39,312 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:39,312 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:39,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-12-21 11:07:39,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-21 11:07:39,518 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:39,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:39,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1699054534, now seen corresponding path program 2 times [2023-12-21 11:07:39,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:39,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816954650] [2023-12-21 11:07:39,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:39,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:39,541 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:39,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63581388] [2023-12-21 11:07:39,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 11:07:39,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:39,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:39,543 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:07:39,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-21 11:07:39,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 11:07:39,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:07:39,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-21 11:07:39,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:39,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2023-12-21 11:07:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-21 11:07:39,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-21 11:07:40,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:40,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816954650] [2023-12-21 11:07:40,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:40,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63581388] [2023-12-21 11:07:40,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63581388] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 11:07:40,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:07:40,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2023-12-21 11:07:40,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704926942] [2023-12-21 11:07:40,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:40,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 11:07:40,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:40,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 11:07:40,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-12-21 11:07:40,231 INFO L87 Difference]: Start difference. First operand 167 states and 291 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 16 states have internal predecessors, (59), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2023-12-21 11:07:42,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:07:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:42,427 INFO L93 Difference]: Finished difference Result 213 states and 405 transitions. [2023-12-21 11:07:42,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 11:07:42,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 16 states have internal predecessors, (59), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) Word has length 61 [2023-12-21 11:07:42,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:42,428 INFO L225 Difference]: With dead ends: 213 [2023-12-21 11:07:42,428 INFO L226 Difference]: Without dead ends: 159 [2023-12-21 11:07:42,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2023-12-21 11:07:42,429 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:42,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 92 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-21 11:07:42,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-12-21 11:07:42,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2023-12-21 11:07:42,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 107 states have (on average 1.1308411214953271) internal successors, (121), 117 states have internal predecessors, (121), 20 states have call successors, (20), 9 states have call predecessors, (20), 31 states have return successors, (127), 32 states have call predecessors, (127), 19 states have call successors, (127) [2023-12-21 11:07:42,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 268 transitions. [2023-12-21 11:07:42,450 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 268 transitions. Word has length 61 [2023-12-21 11:07:42,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:42,450 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 268 transitions. [2023-12-21 11:07:42,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 16 states have internal predecessors, (59), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2023-12-21 11:07:42,450 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 268 transitions. [2023-12-21 11:07:42,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-21 11:07:42,451 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:42,451 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:42,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-12-21 11:07:42,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-21 11:07:42,657 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:42,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:42,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1110642701, now seen corresponding path program 2 times [2023-12-21 11:07:42,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:42,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340101208] [2023-12-21 11:07:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:42,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:42,671 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:42,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164589453] [2023-12-21 11:07:42,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 11:07:42,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:42,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:42,672 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:07:42,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-21 11:07:42,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 11:07:42,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:07:42,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-21 11:07:42,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:42,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-21 11:07:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 34 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-21 11:07:43,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 26 proven. 33 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-21 11:07:43,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:43,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340101208] [2023-12-21 11:07:43,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:43,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164589453] [2023-12-21 11:07:43,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164589453] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 11:07:43,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:07:43,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-12-21 11:07:43,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581582125] [2023-12-21 11:07:43,333 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:43,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 11:07:43,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:43,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 11:07:43,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-12-21 11:07:43,334 INFO L87 Difference]: Start difference. First operand 159 states and 268 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 12 states have internal predecessors, (62), 8 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2023-12-21 11:07:43,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:43,706 INFO L93 Difference]: Finished difference Result 211 states and 406 transitions. [2023-12-21 11:07:43,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-21 11:07:43,706 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 12 states have internal predecessors, (62), 8 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) Word has length 84 [2023-12-21 11:07:43,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:43,708 INFO L225 Difference]: With dead ends: 211 [2023-12-21 11:07:43,708 INFO L226 Difference]: Without dead ends: 161 [2023-12-21 11:07:43,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2023-12-21 11:07:43,710 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:43,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 105 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 11:07:43,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-12-21 11:07:43,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2023-12-21 11:07:43,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 112 states have internal predecessors, (116), 19 states have call successors, (19), 9 states have call predecessors, (19), 32 states have return successors, (128), 33 states have call predecessors, (128), 18 states have call successors, (128) [2023-12-21 11:07:43,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 263 transitions. [2023-12-21 11:07:43,747 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 263 transitions. Word has length 84 [2023-12-21 11:07:43,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:43,747 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 263 transitions. [2023-12-21 11:07:43,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 12 states have internal predecessors, (62), 8 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2023-12-21 11:07:43,748 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 263 transitions. [2023-12-21 11:07:43,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-21 11:07:43,748 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:43,749 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:43,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-12-21 11:07:43,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-21 11:07:43,956 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:43,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:43,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1622527351, now seen corresponding path program 1 times [2023-12-21 11:07:43,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:43,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859000183] [2023-12-21 11:07:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:43,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:43,971 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:43,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687365247] [2023-12-21 11:07:43,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:43,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:43,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:43,972 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:07:44,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-21 11:07:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:44,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 120 conjunts are in the unsatisfiable core [2023-12-21 11:07:44,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:44,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-21 11:07:45,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-21 11:07:45,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2023-12-21 11:07:45,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-21 11:07:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 48 proven. 35 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-21 11:07:45,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:45,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:45,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859000183] [2023-12-21 11:07:45,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:45,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687365247] [2023-12-21 11:07:45,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687365247] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:07:45,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:07:45,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2023-12-21 11:07:45,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140563222] [2023-12-21 11:07:45,632 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:45,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-21 11:07:45,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:45,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-21 11:07:45,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2023-12-21 11:07:45,633 INFO L87 Difference]: Start difference. First operand 155 states and 263 transitions. Second operand has 33 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 30 states have internal predecessors, (50), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 11:07:51,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-21 11:07:51,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:51,227 INFO L93 Difference]: Finished difference Result 183 states and 320 transitions. [2023-12-21 11:07:51,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-21 11:07:51,228 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 30 states have internal predecessors, (50), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 80 [2023-12-21 11:07:51,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:51,229 INFO L225 Difference]: With dead ends: 183 [2023-12-21 11:07:51,229 INFO L226 Difference]: Without dead ends: 145 [2023-12-21 11:07:51,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=367, Invalid=2825, Unknown=0, NotChecked=0, Total=3192 [2023-12-21 11:07:51,229 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 67 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 34 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:51,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 197 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1058 Invalid, 5 Unknown, 0 Unchecked, 4.9s Time] [2023-12-21 11:07:51,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-12-21 11:07:51,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-12-21 11:07:51,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 106 states have internal predecessors, (110), 19 states have call successors, (19), 9 states have call predecessors, (19), 27 states have return successors, (112), 29 states have call predecessors, (112), 18 states have call successors, (112) [2023-12-21 11:07:51,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 241 transitions. [2023-12-21 11:07:51,249 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 241 transitions. Word has length 80 [2023-12-21 11:07:51,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:51,249 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 241 transitions. [2023-12-21 11:07:51,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 30 states have internal predecessors, (50), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 11:07:51,249 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 241 transitions. [2023-12-21 11:07:51,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-21 11:07:51,250 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:51,250 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:51,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-12-21 11:07:51,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-21 11:07:51,450 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:51,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:51,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1032490103, now seen corresponding path program 2 times [2023-12-21 11:07:51,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:51,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697397655] [2023-12-21 11:07:51,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:51,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:51,464 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:51,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685546339] [2023-12-21 11:07:51,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 11:07:51,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:51,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:51,465 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:07:51,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-21 11:07:51,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 11:07:51,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:07:51,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-21 11:07:51,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:51,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-21 11:07:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 39 proven. 11 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-21 11:07:51,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:52,474 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-12-21 11:07:52,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-12-21 11:07:52,621 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-12-21 11:07:52,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-12-21 11:07:52,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:52,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697397655] [2023-12-21 11:07:52,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:52,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685546339] [2023-12-21 11:07:52,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685546339] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:07:52,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:07:52,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-12-21 11:07:52,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102054715] [2023-12-21 11:07:52,820 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:52,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 11:07:52,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:52,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 11:07:52,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-12-21 11:07:52,821 INFO L87 Difference]: Start difference. First operand 145 states and 241 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-21 11:07:53,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:53,106 INFO L93 Difference]: Finished difference Result 145 states and 241 transitions. [2023-12-21 11:07:53,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 11:07:53,106 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 76 [2023-12-21 11:07:53,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:53,106 INFO L225 Difference]: With dead ends: 145 [2023-12-21 11:07:53,106 INFO L226 Difference]: Without dead ends: 0 [2023-12-21 11:07:53,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2023-12-21 11:07:53,121 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:53,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 101 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 11:07:53,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-21 11:07:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-21 11:07:53,122 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 11:07:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-21 11:07:53,122 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 76 [2023-12-21 11:07:53,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:53,122 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-21 11:07:53,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-21 11:07:53,122 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-21 11:07:53,122 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-21 11:07:53,124 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 11:07:53,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-12-21 11:07:53,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:53,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-21 11:08:01,050 WARN L293 SmtUtils]: Spent 6.86s on a formula simplification. DAG size of input: 177 DAG size of output: 98 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2023-12-21 11:08:10,747 WARN L293 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 263 DAG size of output: 1 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) Received shutdown request... [2023-12-21 11:18:05,649 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 11:18:06,850 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-21 11:18:06,895 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Not enough levels on assertion stack at de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.pop(UndoableWrapperScript.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.restore(UndoableWrapperScript.java:87) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:316) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter(HoareAnnotationComposer.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.(HoareAnnotationComposer.java:105) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeIcfgHoareAnnotation(NwaCegarLoop.java:539) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop$CegarLoopResultBuilder.getResult(AbstractCegarLoop.java:873) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-21 11:18:06,900 INFO L158 Benchmark]: Toolchain (without parser) took 868130.60ms. Allocated memory was 302.0MB in the beginning and 557.8MB in the end (delta: 255.9MB). Free memory was 250.0MB in the beginning and 346.9MB in the end (delta: -96.9MB). Peak memory consumption was 336.9MB. Max. memory is 8.0GB. [2023-12-21 11:18:06,901 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 195.0MB. Free memory is still 143.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 11:18:06,901 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.13ms. Allocated memory is still 302.0MB. Free memory was 249.8MB in the beginning and 238.0MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 11:18:06,901 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.45ms. Allocated memory is still 302.0MB. Free memory was 237.8MB in the beginning and 236.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 11:18:06,901 INFO L158 Benchmark]: Boogie Preprocessor took 35.01ms. Allocated memory is still 302.0MB. Free memory was 236.2MB in the beginning and 233.6MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 11:18:06,901 INFO L158 Benchmark]: RCFGBuilder took 352.65ms. Allocated memory is still 302.0MB. Free memory was 233.6MB in the beginning and 212.5MB in the end (delta: 21.1MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2023-12-21 11:18:06,901 INFO L158 Benchmark]: TraceAbstraction took 867534.41ms. Allocated memory was 302.0MB in the beginning and 557.8MB in the end (delta: 255.9MB). Free memory was 211.8MB in the beginning and 346.9MB in the end (delta: -135.1MB). Peak memory consumption was 299.2MB. Max. memory is 8.0GB. [2023-12-21 11:18:06,902 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### [2023-12-21 11:18:06,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 195.0MB. Free memory is still 143.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 183.13ms. Allocated memory is still 302.0MB. Free memory was 249.8MB in the beginning and 238.0MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.45ms. Allocated memory is still 302.0MB. Free memory was 237.8MB in the beginning and 236.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.01ms. Allocated memory is still 302.0MB. Free memory was 236.2MB in the beginning and 233.6MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 352.65ms. Allocated memory is still 302.0MB. Free memory was 233.6MB in the beginning and 212.5MB in the end (delta: 21.1MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. * TraceAbstraction took 867534.41ms. Allocated memory was 302.0MB in the beginning and 557.8MB in the end (delta: 255.9MB). Free memory was 211.8MB in the beginning and 346.9MB in the end (delta: -135.1MB). Peak memory consumption was 299.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Not enough levels on assertion stack de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Not enough levels on assertion stack: de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) RESULT: Ultimate could not prove your program: Toolchain returned no result. !ENTRY org.eclipse.osgi 4 0 2023-12-21 11:18:06.913 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/342fd3c43/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:190) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438) Completed graceful shutdown