/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_fermat1-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 10:55:58,069 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 10:55:58,154 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 10:55:58,160 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 10:55:58,161 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 10:55:58,188 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 10:55:58,189 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 10:55:58,189 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 10:55:58,189 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 10:55:58,193 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 10:55:58,193 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 10:55:58,194 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 10:55:58,194 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 10:55:58,195 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 10:55:58,196 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 10:55:58,196 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 10:55:58,196 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 10:55:58,196 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 10:55:58,196 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 10:55:58,197 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 10:55:58,197 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 10:55:58,197 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 10:55:58,197 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 10:55:58,198 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 10:55:58,198 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 10:55:58,198 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 10:55:58,198 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 10:55:58,198 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 10:55:58,199 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 10:55:58,199 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 10:55:58,200 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 10:55:58,200 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 10:55:58,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:55:58,200 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 10:55:58,200 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 10:55:58,201 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 10:55:58,201 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 10:55:58,201 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 10:55:58,201 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 10:55:58,201 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 10:55:58,201 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 10:55:58,202 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 10:55:58,202 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 10:55:58,202 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 10:55:58,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 10:55:58,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 10:55:58,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 10:55:58,445 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 10:55:58,445 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 10:55:58,446 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_fermat1-ll.c [2023-12-21 10:55:59,547 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 10:55:59,747 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 10:55:59,748 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_fermat1-ll.c [2023-12-21 10:55:59,756 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2362ab619/00d76e0d392644e69c08f22df20eea3d/FLAG0a90926e8 [2023-12-21 10:55:59,770 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2362ab619/00d76e0d392644e69c08f22df20eea3d [2023-12-21 10:55:59,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 10:55:59,773 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 10:55:59,776 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 10:55:59,776 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 10:55:59,780 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 10:55:59,780 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:55:59" (1/1) ... [2023-12-21 10:55:59,781 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57930e4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:55:59, skipping insertion in model container [2023-12-21 10:55:59,781 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:55:59" (1/1) ... [2023-12-21 10:55:59,809 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 10:55:59,934 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_fermat1-ll.c[1101,1114] [2023-12-21 10:55:59,957 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:55:59,965 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 10:55:59,975 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_fermat1-ll.c[1101,1114] [2023-12-21 10:55:59,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 10:56:00,002 INFO L206 MainTranslator]: Completed translation [2023-12-21 10:56:00,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:00 WrapperNode [2023-12-21 10:56:00,002 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 10:56:00,003 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 10:56:00,003 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 10:56:00,003 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 10:56:00,009 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:00" (1/1) ... [2023-12-21 10:56:00,016 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:00" (1/1) ... [2023-12-21 10:56:00,031 INFO L138 Inliner]: procedures = 18, calls = 82, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-12-21 10:56:00,031 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 10:56:00,032 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 10:56:00,032 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 10:56:00,032 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 10:56:00,040 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:00" (1/1) ... [2023-12-21 10:56:00,041 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:00" (1/1) ... [2023-12-21 10:56:00,044 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:00" (1/1) ... [2023-12-21 10:56:00,062 INFO L175 MemorySlicer]: Split 53 memory accesses to 5 slices as follows [2, 11, 16, 16, 8]. 30 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 8 writes are split as follows [0, 3, 2, 2, 1]. [2023-12-21 10:56:00,062 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:00" (1/1) ... [2023-12-21 10:56:00,063 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:00" (1/1) ... [2023-12-21 10:56:00,069 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:00" (1/1) ... [2023-12-21 10:56:00,074 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:00" (1/1) ... [2023-12-21 10:56:00,075 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:00" (1/1) ... [2023-12-21 10:56:00,077 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:00" (1/1) ... [2023-12-21 10:56:00,079 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 10:56:00,081 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 10:56:00,081 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 10:56:00,081 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 10:56:00,081 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:00" (1/1) ... [2023-12-21 10:56:00,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 10:56:00,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:56:00,117 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 10:56:00,127 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 10:56:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 10:56:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_36_0 [2023-12-21 10:56:00,146 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_36_0 [2023-12-21 10:56:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-21 10:56:00,146 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-21 10:56:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 10:56:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-21 10:56:00,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-21 10:56:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-21 10:56:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-21 10:56:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-21 10:56:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-21 10:56:00,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-21 10:56:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-21 10:56:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-21 10:56:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-21 10:56:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_38_to_43_0 [2023-12-21 10:56:00,150 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_38_to_43_0 [2023-12-21 10:56:00,150 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_46_to_51_0 [2023-12-21 10:56:00,150 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_46_to_51_0 [2023-12-21 10:56:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 10:56:00,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 10:56:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-21 10:56:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-21 10:56:00,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-21 10:56:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-21 10:56:00,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-21 10:56:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-21 10:56:00,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-21 10:56:00,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-21 10:56:00,272 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 10:56:00,276 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 10:56:00,528 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 10:56:00,548 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 10:56:00,548 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-21 10:56:00,549 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:56:00 BoogieIcfgContainer [2023-12-21 10:56:00,549 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 10:56:00,551 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 10:56:00,551 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 10:56:00,553 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 10:56:00,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:55:59" (1/3) ... [2023-12-21 10:56:00,554 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b0e0983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:56:00, skipping insertion in model container [2023-12-21 10:56:00,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:56:00" (2/3) ... [2023-12-21 10:56:00,554 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b0e0983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:56:00, skipping insertion in model container [2023-12-21 10:56:00,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:56:00" (3/3) ... [2023-12-21 10:56:00,555 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_fermat1-ll.c [2023-12-21 10:56:00,566 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 10:56:00,566 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 10:56:00,600 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 10:56:00,605 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;@75ce383, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 10:56:00,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 10:56:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 31 states have internal predecessors, (36), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-21 10:56:00,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-21 10:56:00,615 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:56:00,615 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:56:00,616 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:56:00,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:56:00,620 INFO L85 PathProgramCache]: Analyzing trace with hash -63826277, now seen corresponding path program 1 times [2023-12-21 10:56:00,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:56:00,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644017029] [2023-12-21 10:56:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:00,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:56:00,765 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:56:00,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060116706] [2023-12-21 10:56:00,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:00,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:56:00,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:56:00,768 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 10:56:00,769 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 10:56:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:56:00,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-21 10:56:00,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:56:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 10:56:00,888 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 10:56:00,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:56:00,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644017029] [2023-12-21 10:56:00,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:56:00,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060116706] [2023-12-21 10:56:00,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060116706] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:56:00,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:56:00,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 10:56:00,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386412689] [2023-12-21 10:56:00,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:56:00,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 10:56:00,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:56:00,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 10:56:00,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 10:56:00,918 INFO L87 Difference]: Start difference. First operand has 46 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 31 states have internal predecessors, (36), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 10:56:00,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:56:00,944 INFO L93 Difference]: Finished difference Result 90 states and 129 transitions. [2023-12-21 10:56:00,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 10:56:00,947 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-12-21 10:56:00,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:56:00,952 INFO L225 Difference]: With dead ends: 90 [2023-12-21 10:56:00,953 INFO L226 Difference]: Without dead ends: 44 [2023-12-21 10:56:00,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 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 10:56:00,958 INFO L413 NwaCegarLoop]: 53 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, 53 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 10:56:00,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 10:56:00,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-21 10:56:00,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-12-21 10:56:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 30 states have internal predecessors, (30), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-21 10:56:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2023-12-21 10:56:00,989 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 20 [2023-12-21 10:56:00,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:56:00,990 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2023-12-21 10:56:00,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 10:56:00,990 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2023-12-21 10:56:00,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-21 10:56:00,991 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:56:00,991 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:56:00,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-21 10:56:01,197 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 10:56:01,197 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:56:01,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:56:01,198 INFO L85 PathProgramCache]: Analyzing trace with hash -951109601, now seen corresponding path program 1 times [2023-12-21 10:56:01,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:56:01,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998016726] [2023-12-21 10:56:01,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:01,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:56:01,232 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:56:01,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013754889] [2023-12-21 10:56:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:01,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:56:01,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:56:01,237 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 10:56:01,239 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 10:56:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:56:01,377 WARN L260 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 91 conjunts are in the unsatisfiable core [2023-12-21 10:56:01,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:56:01,446 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 10:56:01,653 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 10:56:01,668 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 21 treesize of output 15 [2023-12-21 10:56:01,676 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 10:56:02,077 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 43 treesize of output 35 [2023-12-21 10:56:02,096 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 55 treesize of output 39 [2023-12-21 10:56:02,109 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 60 treesize of output 36 [2023-12-21 10:56:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 10:56:02,284 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 10:56:02,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:56:02,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998016726] [2023-12-21 10:56:02,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:56:02,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013754889] [2023-12-21 10:56:02,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013754889] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:56:02,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:56:02,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-12-21 10:56:02,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626663886] [2023-12-21 10:56:02,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:56:02,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-21 10:56:02,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:56:02,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-21 10:56:02,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-12-21 10:56:02,288 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 13 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 10:56:04,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 10:56:05,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:56:05,150 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2023-12-21 10:56:05,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 10:56:05,151 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-12-21 10:56:05,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:56:05,153 INFO L225 Difference]: With dead ends: 60 [2023-12-21 10:56:05,153 INFO L226 Difference]: Without dead ends: 58 [2023-12-21 10:56:05,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-12-21 10:56:05,155 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 21 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-21 10:56:05,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 344 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-21 10:56:05,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-21 10:56:05,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2023-12-21 10:56:05,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 38 states have internal predecessors, (39), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-12-21 10:56:05,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2023-12-21 10:56:05,168 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 20 [2023-12-21 10:56:05,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:56:05,168 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2023-12-21 10:56:05,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 10:56:05,169 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2023-12-21 10:56:05,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-21 10:56:05,170 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:56:05,170 INFO L195 NwaCegarLoop]: trace histogram [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 10:56:05,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 10:56:05,376 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 10:56:05,377 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:56:05,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:56:05,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1139007694, now seen corresponding path program 1 times [2023-12-21 10:56:05,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:56:05,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851663205] [2023-12-21 10:56:05,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:05,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:56:05,419 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:56:05,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371309543] [2023-12-21 10:56:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:05,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:56:05,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:56:05,422 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 10:56:05,442 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 10:56:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:56:05,589 WARN L260 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 140 conjunts are in the unsatisfiable core [2023-12-21 10:56:05,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:56:05,608 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 10:56:05,665 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 10:56:05,671 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 10:56:05,676 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 10:56:06,336 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 44 treesize of output 36 [2023-12-21 10:56:06,346 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 54 treesize of output 30 [2023-12-21 10:56:06,351 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 20 [2023-12-21 10:56:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 10:56:06,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:56:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 10:56:07,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:56:07,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851663205] [2023-12-21 10:56:07,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:56:07,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371309543] [2023-12-21 10:56:07,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371309543] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:56:07,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:56:07,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2023-12-21 10:56:07,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687477144] [2023-12-21 10:56:07,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 10:56:07,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 10:56:07,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:56:07,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 10:56:07,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2023-12-21 10:56:07,238 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 27 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 9 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-21 10:56:12,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-21 10:56:14,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:56:14,563 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2023-12-21 10:56:14,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-21 10:56:14,563 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 9 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 30 [2023-12-21 10:56:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:56:14,565 INFO L225 Difference]: With dead ends: 111 [2023-12-21 10:56:14,565 INFO L226 Difference]: Without dead ends: 109 [2023-12-21 10:56:14,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=201, Invalid=1521, Unknown=0, NotChecked=0, Total=1722 [2023-12-21 10:56:14,568 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 73 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-12-21 10:56:14,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 618 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-12-21 10:56:14,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-21 10:56:14,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2023-12-21 10:56:14,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 68 states have internal predecessors, (71), 21 states have call successors, (21), 13 states have call predecessors, (21), 16 states have return successors, (27), 20 states have call predecessors, (27), 19 states have call successors, (27) [2023-12-21 10:56:14,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2023-12-21 10:56:14,610 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 30 [2023-12-21 10:56:14,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:56:14,610 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2023-12-21 10:56:14,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 9 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-21 10:56:14,611 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2023-12-21 10:56:14,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-21 10:56:14,611 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:56:14,612 INFO L195 NwaCegarLoop]: trace histogram [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 10:56:14,624 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 10:56:14,818 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 10:56:14,818 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:56:14,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:56:14,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1135914954, now seen corresponding path program 1 times [2023-12-21 10:56:14,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:56:14,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228492761] [2023-12-21 10:56:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:14,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:56:14,838 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:56:14,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222058633] [2023-12-21 10:56:14,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:14,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:56:14,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:56:14,845 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 10:56:14,863 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 10:56:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:56:14,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 96 conjunts are in the unsatisfiable core [2023-12-21 10:56:14,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:56:14,973 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 10:56:15,102 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 10:56:15,115 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 10:56:15,171 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 56 treesize of output 40 [2023-12-21 10:56:15,534 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 61 treesize of output 53 [2023-12-21 10:56:23,840 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 106 treesize of output 66 [2023-12-21 10:56:23,890 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:56:23,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 91 [2023-12-21 10:56:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 10:56:28,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:56:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 10:56:28,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:56:28,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228492761] [2023-12-21 10:56:28,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:56:28,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222058633] [2023-12-21 10:56:28,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222058633] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:56:28,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:56:28,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 31 [2023-12-21 10:56:28,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887582638] [2023-12-21 10:56:28,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 10:56:28,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-21 10:56:28,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:56:28,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-21 10:56:28,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2023-12-21 10:56:28,984 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand has 31 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 8 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-21 10:56:33,025 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 [0] [2023-12-21 10:56:46,830 WARN L293 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 10:56:48,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:56:48,401 INFO L93 Difference]: Finished difference Result 140 states and 186 transitions. [2023-12-21 10:56:48,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-21 10:56:48,402 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 8 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 30 [2023-12-21 10:56:48,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:56:48,404 INFO L225 Difference]: With dead ends: 140 [2023-12-21 10:56:48,404 INFO L226 Difference]: Without dead ends: 122 [2023-12-21 10:56:48,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=296, Invalid=2356, Unknown=0, NotChecked=0, Total=2652 [2023-12-21 10:56:48,406 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-12-21 10:56:48,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 124 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 987 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2023-12-21 10:56:48,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-12-21 10:56:48,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2023-12-21 10:56:48,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 73 states have internal predecessors, (76), 25 states have call successors, (25), 14 states have call predecessors, (25), 20 states have return successors, (46), 28 states have call predecessors, (46), 23 states have call successors, (46) [2023-12-21 10:56:48,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 147 transitions. [2023-12-21 10:56:48,432 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 147 transitions. Word has length 30 [2023-12-21 10:56:48,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:56:48,432 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 147 transitions. [2023-12-21 10:56:48,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 8 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-21 10:56:48,433 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 147 transitions. [2023-12-21 10:56:48,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 10:56:48,434 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:56:48,434 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:56:48,440 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 10:56:48,640 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 10:56:48,641 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:56:48,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:56:48,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1338850680, now seen corresponding path program 1 times [2023-12-21 10:56:48,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:56:48,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041293538] [2023-12-21 10:56:48,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:48,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:56:48,658 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:56:48,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671627789] [2023-12-21 10:56:48,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:48,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:56:48,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:56:48,665 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 10:56:48,665 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 10:56:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:56:48,833 WARN L260 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 178 conjunts are in the unsatisfiable core [2023-12-21 10:56:48,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:56:48,847 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 10:56:48,879 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 10:56:48,885 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 10:56:48,887 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 10:56:49,323 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 61 treesize of output 53 [2023-12-21 10:56:49,328 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 57 treesize of output 49 [2023-12-21 10:56:49,332 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 67 treesize of output 43 [2023-12-21 10:56:49,336 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 55 treesize of output 31 [2023-12-21 10:56:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 10:56:49,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:56:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 10:56:50,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:56:50,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041293538] [2023-12-21 10:56:50,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:56:50,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671627789] [2023-12-21 10:56:50,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671627789] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 10:56:50,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 10:56:50,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 28 [2023-12-21 10:56:50,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750504038] [2023-12-21 10:56:50,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 10:56:50,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-21 10:56:50,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:56:50,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-21 10:56:50,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2023-12-21 10:56:50,148 INFO L87 Difference]: Start difference. First operand 114 states and 147 transitions. Second operand has 28 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 10 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-21 10:56:52,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:56:52,111 INFO L93 Difference]: Finished difference Result 140 states and 185 transitions. [2023-12-21 10:56:52,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-21 10:56:52,112 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 10 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 42 [2023-12-21 10:56:52,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:56:52,114 INFO L225 Difference]: With dead ends: 140 [2023-12-21 10:56:52,114 INFO L226 Difference]: Without dead ends: 138 [2023-12-21 10:56:52,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=208, Invalid=1772, Unknown=0, NotChecked=0, Total=1980 [2023-12-21 10:56:52,115 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 67 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-21 10:56:52,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 189 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-21 10:56:52,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-12-21 10:56:52,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2023-12-21 10:56:52,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 87 states have internal predecessors, (90), 28 states have call successors, (28), 17 states have call predecessors, (28), 25 states have return successors, (57), 32 states have call predecessors, (57), 26 states have call successors, (57) [2023-12-21 10:56:52,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 175 transitions. [2023-12-21 10:56:52,147 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 175 transitions. Word has length 42 [2023-12-21 10:56:52,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:56:52,147 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 175 transitions. [2023-12-21 10:56:52,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 10 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-21 10:56:52,148 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 175 transitions. [2023-12-21 10:56:52,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-21 10:56:52,149 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:56:52,149 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 10:56:52,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 10:56:52,358 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 10:56:52,358 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:56:52,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:56:52,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1459348665, now seen corresponding path program 1 times [2023-12-21 10:56:52,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:56:52,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208107657] [2023-12-21 10:56:52,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:52,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:56:52,389 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:56:52,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036767859] [2023-12-21 10:56:52,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:52,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:56:52,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:56:52,397 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 10:56:52,421 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 10:56:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:56:52,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-21 10:56:52,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:56:52,537 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 10:56:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-21 10:56:52,694 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 10:56:52,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:56:52,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208107657] [2023-12-21 10:56:52,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:56:52,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036767859] [2023-12-21 10:56:52,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036767859] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 10:56:52,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 10:56:52,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-12-21 10:56:52,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57743214] [2023-12-21 10:56:52,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 10:56:52,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 10:56:52,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:56:52,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 10:56:52,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-12-21 10:56:52,697 INFO L87 Difference]: Start difference. First operand 135 states and 175 transitions. Second operand has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-21 10:56:53,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 10:56:53,072 INFO L93 Difference]: Finished difference Result 245 states and 328 transitions. [2023-12-21 10:56:53,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 10:56:53,072 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 54 [2023-12-21 10:56:53,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 10:56:53,074 INFO L225 Difference]: With dead ends: 245 [2023-12-21 10:56:53,074 INFO L226 Difference]: Without dead ends: 133 [2023-12-21 10:56:53,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2023-12-21 10:56:53,076 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 10:56:53,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 124 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 10:56:53,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-12-21 10:56:53,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2023-12-21 10:56:53,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 87 states have internal predecessors, (90), 26 states have call successors, (26), 17 states have call predecessors, (26), 25 states have return successors, (47), 28 states have call predecessors, (47), 24 states have call successors, (47) [2023-12-21 10:56:53,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 163 transitions. [2023-12-21 10:56:53,107 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 163 transitions. Word has length 54 [2023-12-21 10:56:53,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 10:56:53,107 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 163 transitions. [2023-12-21 10:56:53,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-21 10:56:53,107 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 163 transitions. [2023-12-21 10:56:53,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-21 10:56:53,109 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 10:56:53,109 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1] [2023-12-21 10:56:53,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-21 10:56:53,314 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 10:56:53,315 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 10:56:53,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 10:56:53,315 INFO L85 PathProgramCache]: Analyzing trace with hash -48276930, now seen corresponding path program 1 times [2023-12-21 10:56:53,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 10:56:53,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317695127] [2023-12-21 10:56:53,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:53,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 10:56:53,330 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 10:56:53,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311256399] [2023-12-21 10:56:53,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 10:56:53,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 10:56:53,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 10:56:53,332 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 10:56:53,354 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 10:56:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 10:56:53,467 WARN L260 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 264 conjunts are in the unsatisfiable core [2023-12-21 10:56:53,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 10:56:53,476 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 10:56:53,519 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 21 treesize of output 15 [2023-12-21 10:56:53,523 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 15 treesize of output 11 [2023-12-21 10:56:53,537 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 10:56:53,894 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 35 treesize of output 31 [2023-12-21 10:56:55,636 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 53 treesize of output 41 [2023-12-21 10:56:55,658 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 10:57:12,097 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 10:57:32,238 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 10:57:48,557 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 10:57:48,604 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 44 treesize of output 36 [2023-12-21 10:57:48,613 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 32 [2023-12-21 10:57:48,622 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 10:57:48,623 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 89 treesize of output 61 [2023-12-21 10:58:04,790 WARN L293 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 10:58:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-21 10:58:04,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 10:58:31,878 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 134 treesize of output 126 [2023-12-21 10:58:31,891 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 126 treesize of output 94 [2023-12-21 10:58:35,997 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse11 (select |c_old(#memory_int#3)| |c_func_to_recursive_line_38_to_43_0_#in~v.base|)) (.cse10 (select |c_old(#memory_int#1)| |c_func_to_recursive_line_38_to_43_0_#in~r.base|)) (.cse1 (select (select |c_#memory_int#2| |c_func_to_recursive_line_38_to_43_0_#in~u.base|) |c_func_to_recursive_line_38_to_43_0_#in~u.offset|))) (let ((.cse3 (* .cse1 .cse1)) (.cse4 (forall ((|v_func_to_recursive_line_38_to_43_0_#in~r.offset_BEFORE_CALL_9| Int) (|v_func_to_recursive_line_38_to_43_0_#in~u.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_38_to_43_0_#in~r.base_BEFORE_CALL_9| Int) (|v_func_to_recursive_line_38_to_43_0_#in~A.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_38_to_43_0_#in~u.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_38_to_43_0_#in~A.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_38_to_43_0_#in~v.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_38_to_43_0_#in~v.base_BEFORE_CALL_8| Int)) (let ((.cse13 (select (select |c_#memory_int#2| |v_func_to_recursive_line_38_to_43_0_#in~u.base_BEFORE_CALL_8|) |v_func_to_recursive_line_38_to_43_0_#in~u.offset_BEFORE_CALL_8|)) (.cse14 (select (select |c_#memory_int#3| |v_func_to_recursive_line_38_to_43_0_#in~v.base_BEFORE_CALL_8|) |v_func_to_recursive_line_38_to_43_0_#in~v.offset_BEFORE_CALL_8|))) (= (+ (* (select (select |c_#memory_int#4| |v_func_to_recursive_line_38_to_43_0_#in~A.base_BEFORE_CALL_8|) |v_func_to_recursive_line_38_to_43_0_#in~A.offset_BEFORE_CALL_8|) 4) (* 2 .cse13) (* (select (select |c_#memory_int#1| |v_func_to_recursive_line_38_to_43_0_#in~r.base_BEFORE_CALL_9|) |v_func_to_recursive_line_38_to_43_0_#in~r.offset_BEFORE_CALL_9|) 4) (* .cse14 .cse14)) (+ (* .cse13 .cse13) (* 2 .cse14)))))) (.cse0 (select .cse10 |c_func_to_recursive_line_38_to_43_0_#in~r.offset|)) (.cse2 (select .cse11 |c_func_to_recursive_line_38_to_43_0_#in~v.offset|))) (and (or (< (+ (* 2 .cse0) .cse1 (* 2 (select (select |c_#memory_int#4| |c_func_to_recursive_line_38_to_43_0_#in~A.base|) |c_func_to_recursive_line_38_to_43_0_#in~A.offset|))) (+ (div (+ (* (- 1) .cse2 .cse2) .cse3) 2) .cse2 1)) .cse4) (or (= (mod (+ .cse3 (* .cse2 .cse2)) 2) 0) .cse4) (forall ((|v_func_to_recursive_line_38_to_43_0_#in~r.offset_BEFORE_CALL_9| Int) (|v_func_to_recursive_line_38_to_43_0_#in~u.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_38_to_43_0_#in~r.base_BEFORE_CALL_9| Int) (|v_func_to_recursive_line_38_to_43_0_#in~A.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_38_to_43_0_#in~u.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_38_to_43_0_#in~A.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_38_to_43_0_#in~v.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_38_to_43_0_#in~v.base_BEFORE_CALL_8| Int)) (let ((.cse12 (select (select |c_#memory_int#2| |v_func_to_recursive_line_38_to_43_0_#in~u.base_BEFORE_CALL_8|) |v_func_to_recursive_line_38_to_43_0_#in~u.offset_BEFORE_CALL_8|))) (let ((.cse5 (* (select (select |c_#memory_int#4| |v_func_to_recursive_line_38_to_43_0_#in~A.base_BEFORE_CALL_8|) |v_func_to_recursive_line_38_to_43_0_#in~A.offset_BEFORE_CALL_8|) 4)) (.cse6 (* 2 .cse12)) (.cse8 (* .cse12 .cse12))) (or (let ((.cse7 (select (select |c_#memory_int#3| |v_func_to_recursive_line_38_to_43_0_#in~v.base_BEFORE_CALL_8|) |v_func_to_recursive_line_38_to_43_0_#in~v.offset_BEFORE_CALL_8|))) (= (+ .cse5 .cse6 (* (select (select |c_#memory_int#1| |v_func_to_recursive_line_38_to_43_0_#in~r.base_BEFORE_CALL_9|) |v_func_to_recursive_line_38_to_43_0_#in~r.offset_BEFORE_CALL_9|) 4) (* .cse7 .cse7)) (+ .cse8 (* 2 .cse7)))) (not (let ((.cse9 (select (select (store |c_old(#memory_int#3)| |c_func_to_recursive_line_38_to_43_0_#in~v.base| (store .cse11 |c_func_to_recursive_line_38_to_43_0_#in~v.offset| (+ 2 .cse2))) |v_func_to_recursive_line_38_to_43_0_#in~v.base_BEFORE_CALL_8|) |v_func_to_recursive_line_38_to_43_0_#in~v.offset_BEFORE_CALL_8|))) (= (+ (* .cse9 .cse9) .cse5 .cse6 (* (select (select (store |c_old(#memory_int#1)| |c_func_to_recursive_line_38_to_43_0_#in~r.base| (store .cse10 |c_func_to_recursive_line_38_to_43_0_#in~r.offset| (+ (* (- 1) .cse2) .cse0))) |v_func_to_recursive_line_38_to_43_0_#in~r.base_BEFORE_CALL_9|) |v_func_to_recursive_line_38_to_43_0_#in~r.offset_BEFORE_CALL_9|) 4)) (+ .cse8 (* 2 .cse9)))))))))))) is different from false [2023-12-21 10:58:49,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 10:58:49,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317695127] [2023-12-21 10:58:49,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 10:58:49,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311256399] [2023-12-21 10:58:49,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311256399] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 10:58:49,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 10:58:49,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-12-21 10:58:49,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946401639] [2023-12-21 10:58:49,593 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 10:58:49,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-21 10:58:49,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 10:58:49,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-21 10:58:49,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1078, Unknown=11, NotChecked=66, Total=1260 [2023-12-21 10:58:49,594 INFO L87 Difference]: Start difference. First operand 133 states and 163 transitions. Second operand has 25 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 8 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-21 10:58:57,222 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 [0] [2023-12-21 10:59:06,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 10:59:10,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 10:59:16,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 10:59:42,911 WARN L293 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 10:59:59,739 WARN L293 SmtUtils]: Spent 16.20s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 11:00:25,085 WARN L293 SmtUtils]: Spent 24.39s on a formula simplification that was a NOOP. DAG size: 116 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 11:00:32,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:00:33,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:00:33,428 INFO L93 Difference]: Finished difference Result 174 states and 216 transitions. [2023-12-21 11:00:33,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-21 11:00:33,429 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 8 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 66 [2023-12-21 11:00:33,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:00:33,433 INFO L225 Difference]: With dead ends: 174 [2023-12-21 11:00:33,434 INFO L226 Difference]: Without dead ends: 170 [2023-12-21 11:00:33,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 155.0s TimeCoverageRelationStatistics Valid=298, Invalid=2873, Unknown=25, NotChecked=110, Total=3306 [2023-12-21 11:00:33,435 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 97 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 49 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.0s IncrementalHoareTripleChecker+Time [2023-12-21 11:00:33,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 294 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1136 Invalid, 12 Unknown, 0 Unchecked, 27.0s Time] [2023-12-21 11:00:33,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-21 11:00:33,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2023-12-21 11:00:33,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 105 states have (on average 1.1047619047619048) internal successors, (116), 111 states have internal predecessors, (116), 33 states have call successors, (33), 23 states have call predecessors, (33), 31 states have return successors, (62), 35 states have call predecessors, (62), 31 states have call successors, (62) [2023-12-21 11:00:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 211 transitions. [2023-12-21 11:00:33,488 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 211 transitions. Word has length 66 [2023-12-21 11:00:33,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:00:33,490 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 211 transitions. [2023-12-21 11:00:33,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 8 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-21 11:00:33,490 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 211 transitions. [2023-12-21 11:00:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-21 11:00:33,495 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:00:33,495 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1] [2023-12-21 11:00:33,507 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 11:00:33,702 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 11:00:33,703 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:00:33,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:00:33,703 INFO L85 PathProgramCache]: Analyzing trace with hash 271653945, now seen corresponding path program 2 times [2023-12-21 11:00:33,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:00:33,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709267068] [2023-12-21 11:00:33,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:00:33,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:00:33,728 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:00:33,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843160462] [2023-12-21 11:00:33,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 11:00:33,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:00:33,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:00:33,731 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 11:00:33,736 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 11:00:33,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 11:00:33,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:00:33,915 WARN L260 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 284 conjunts are in the unsatisfiable core [2023-12-21 11:00:33,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:00:33,930 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 11:00:33,971 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 11:00:33,978 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 11:00:34,724 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 13 [2023-12-21 11:00:35,660 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 11:00:56,421 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 43 treesize of output 35 [2023-12-21 11:00:56,429 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 31 [2023-12-21 11:00:56,438 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:00:56,439 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 71 treesize of output 47 [2023-12-21 11:01:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-21 11:01:04,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:01:29,588 WARN L293 SmtUtils]: Spent 7.10s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-21 11:01:40,028 WARN L293 SmtUtils]: Spent 7.38s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 302] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-21 11:01:50,194 WARN L293 SmtUtils]: Spent 9.84s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-21 11:01:57,786 WARN L293 SmtUtils]: Spent 7.59s on a formula simplification that was a NOOP. DAG size: 88 (called from [L 302] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-21 11:01:57,813 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:01:57,813 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 269 treesize of output 268 [2023-12-21 11:02:36,075 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:02:36,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 674 treesize of output 687 [2023-12-21 11:02:55,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:02:55,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709267068] [2023-12-21 11:02:55,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:02:55,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843160462] [2023-12-21 11:02:55,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843160462] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:02:55,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:02:55,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-12-21 11:02:55,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916507025] [2023-12-21 11:02:55,006 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:02:55,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-21 11:02:55,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:02:55,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-21 11:02:55,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1277, Unknown=8, NotChecked=0, Total=1406 [2023-12-21 11:02:55,008 INFO L87 Difference]: Start difference. First operand 170 states and 211 transitions. Second operand has 28 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 8 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-21 11:03:19,462 WARN L293 SmtUtils]: Spent 8.24s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 11:03:33,721 WARN L293 SmtUtils]: Spent 12.89s on a formula simplification that was a NOOP. DAG size: 102 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 11:03:42,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:03:42,378 INFO L93 Difference]: Finished difference Result 204 states and 266 transitions. [2023-12-21 11:03:42,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-21 11:03:42,379 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 8 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) Word has length 78 [2023-12-21 11:03:42,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:03:42,383 INFO L225 Difference]: With dead ends: 204 [2023-12-21 11:03:42,383 INFO L226 Difference]: Without dead ends: 202 [2023-12-21 11:03:42,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 111.2s TimeCoverageRelationStatistics Valid=370, Invalid=3527, Unknown=9, NotChecked=0, Total=3906 [2023-12-21 11:03:42,385 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 186 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 144 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-12-21 11:03:42,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 292 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1486 Invalid, 7 Unknown, 0 Unchecked, 4.9s Time] [2023-12-21 11:03:42,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-12-21 11:03:42,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 190. [2023-12-21 11:03:42,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 116 states have (on average 1.103448275862069) internal successors, (128), 123 states have internal predecessors, (128), 37 states have call successors, (37), 25 states have call predecessors, (37), 36 states have return successors, (80), 41 states have call predecessors, (80), 35 states have call successors, (80) [2023-12-21 11:03:42,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 245 transitions. [2023-12-21 11:03:42,442 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 245 transitions. Word has length 78 [2023-12-21 11:03:42,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:03:42,443 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 245 transitions. [2023-12-21 11:03:42,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 8 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-21 11:03:42,443 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 245 transitions. [2023-12-21 11:03:42,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-21 11:03:42,445 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:03:42,445 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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] [2023-12-21 11:03:42,454 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 11:03:42,653 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 11:03:42,654 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:03:42,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:03:42,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1675105036, now seen corresponding path program 3 times [2023-12-21 11:03:42,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:03:42,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479089966] [2023-12-21 11:03:42,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:03:42,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:03:42,687 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:03:42,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507762101] [2023-12-21 11:03:42,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 11:03:42,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:03:42,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:03:42,697 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 11:03:42,699 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 11:03:57,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-21 11:03:57,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:03:57,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 296 conjunts are in the unsatisfiable core [2023-12-21 11:03:57,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:03:57,239 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 11:03:57,275 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 11:03:57,788 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 41 treesize of output 29 [2023-12-21 11:03:57,794 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 24 treesize of output 15 [2023-12-21 11:03:58,312 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 61 treesize of output 53 [2023-12-21 11:03:58,319 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 57 treesize of output 49 [2023-12-21 11:03:58,324 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 67 treesize of output 43 [2023-12-21 11:03:58,330 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 55 treesize of output 31 [2023-12-21 11:03:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 42 proven. 22 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-12-21 11:03:58,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:04:13,478 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:04:13,478 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 217 treesize of output 184 [2023-12-21 11:04:13,498 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:04:13,498 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 262 treesize of output 253 [2023-12-21 11:04:37,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:04:37,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479089966] [2023-12-21 11:04:37,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:04:37,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507762101] [2023-12-21 11:04:37,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507762101] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:04:37,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:04:37,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-12-21 11:04:37,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037334891] [2023-12-21 11:04:37,934 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:04:37,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 11:04:37,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:04:37,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 11:04:37,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=537, Unknown=2, NotChecked=0, Total=600 [2023-12-21 11:04:37,935 INFO L87 Difference]: Start difference. First operand 190 states and 245 transitions. Second operand has 19 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 6 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-21 11:04:42,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:04:42,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:04:42,732 INFO L93 Difference]: Finished difference Result 207 states and 265 transitions. [2023-12-21 11:04:42,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 11:04:42,733 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 6 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 90 [2023-12-21 11:04:42,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:04:42,734 INFO L225 Difference]: With dead ends: 207 [2023-12-21 11:04:42,734 INFO L226 Difference]: Without dead ends: 205 [2023-12-21 11:04:42,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=178, Invalid=1460, Unknown=2, NotChecked=0, Total=1640 [2023-12-21 11:04:42,735 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-12-21 11:04:42,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 189 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-12-21 11:04:42,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-12-21 11:04:42,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 196. [2023-12-21 11:04:42,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 120 states have (on average 1.1) internal successors, (132), 127 states have internal predecessors, (132), 37 states have call successors, (37), 26 states have call predecessors, (37), 38 states have return successors, (83), 42 states have call predecessors, (83), 35 states have call successors, (83) [2023-12-21 11:04:42,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 252 transitions. [2023-12-21 11:04:42,787 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 252 transitions. Word has length 90 [2023-12-21 11:04:42,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:04:42,787 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 252 transitions. [2023-12-21 11:04:42,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.9375) internal successors, (31), 14 states have internal predecessors, (31), 6 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-21 11:04:42,787 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 252 transitions. [2023-12-21 11:04:42,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-21 11:04:42,788 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:04:42,788 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:04:42,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-21 11:04:42,989 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 11:04:42,989 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:04:42,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:04:42,989 INFO L85 PathProgramCache]: Analyzing trace with hash -613939461, now seen corresponding path program 1 times [2023-12-21 11:04:42,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:04:42,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483392604] [2023-12-21 11:04:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:04:42,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:04:43,008 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:04:43,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945014803] [2023-12-21 11:04:43,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:04:43,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:04:43,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:04:43,010 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 11:04:43,022 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 11:04:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:04:43,262 WARN L260 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 259 conjunts are in the unsatisfiable core [2023-12-21 11:04:43,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:04:43,273 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 11:04:43,356 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 11:04:43,363 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 11:04:43,373 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 11:05:00,727 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 32 [2023-12-21 11:06:29,953 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 32 [2023-12-21 11:06:29,964 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:06:29,964 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 55 treesize of output 43 [2023-12-21 11:06:36,209 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 58 treesize of output 46 [2023-12-21 11:06:36,294 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2023-12-21 11:06:36,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 67 [2023-12-21 11:06:53,471 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:06:53,471 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 80 treesize of output 56 [2023-12-21 11:06:53,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:06:53,496 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 64 treesize of output 48 [2023-12-21 11:06:53,505 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 20 [2023-12-21 11:06:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 11:06:57,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:10,615 WARN L293 SmtUtils]: Spent 12.08s on a formula simplification that was a NOOP. DAG size: 119 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-21 11:07:22,556 WARN L293 SmtUtils]: Spent 11.89s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-21 11:07:31,895 WARN L293 SmtUtils]: Spent 9.34s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 302] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-21 11:08:46,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:08:46,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483392604] [2023-12-21 11:08:46,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:08:46,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945014803] [2023-12-21 11:08:46,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945014803] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:08:46,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:08:46,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2023-12-21 11:08:46,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390341060] [2023-12-21 11:08:46,115 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:08:46,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-21 11:08:46,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:08:46,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-21 11:08:46,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1323, Unknown=24, NotChecked=0, Total=1482 [2023-12-21 11:08:46,117 INFO L87 Difference]: Start difference. First operand 196 states and 252 transitions. Second operand has 30 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 10 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-21 11:09:09,291 WARN L293 SmtUtils]: Spent 5.19s on a formula simplification that was a NOOP. DAG size: 137 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 11:09:35,452 WARN L293 SmtUtils]: Spent 10.02s on a formula simplification. DAG size of input: 159 DAG size of output: 144 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 11:09:46,095 WARN L293 SmtUtils]: Spent 9.12s on a formula simplification that was a NOOP. DAG size: 128 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 11:10:03,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:10:05,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:10:19,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:10:28,868 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 [0] Received shutdown request... [2023-12-21 11:10:30,208 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 11:10:30,208 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 11:10:31,218 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 11:10:31,409 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 11:10:31,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 [2023-12-21 11:10:31,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 215.6s TimeCoverageRelationStatistics Valid=334, Invalid=2721, Unknown=25, NotChecked=0, Total=3080 [2023-12-21 11:10:31,458 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 38 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:31,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 108 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 718 Invalid, 5 Unknown, 0 Unchecked, 16.6s Time] [2023-12-21 11:10:31,459 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 11:10:31,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-21 11:10:31,459 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-12-21 11:10:31,462 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:10:31,464 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 11:10:31,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 11:10:31 BoogieIcfgContainer [2023-12-21 11:10:31,466 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 11:10:31,466 INFO L158 Benchmark]: Toolchain (without parser) took 871692.98ms. Allocated memory was 337.6MB in the beginning and 417.3MB in the end (delta: 79.7MB). Free memory was 286.1MB in the beginning and 371.7MB in the end (delta: -85.6MB). Peak memory consumption was 233.7MB. Max. memory is 8.0GB. [2023-12-21 11:10:31,466 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 180.4MB. Free memory was 130.6MB in the beginning and 130.4MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 11:10:31,466 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.83ms. Allocated memory is still 337.6MB. Free memory was 285.7MB in the beginning and 273.6MB in the end (delta: 12.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 11:10:31,467 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.92ms. Allocated memory is still 337.6MB. Free memory was 273.6MB in the beginning and 271.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 11:10:31,467 INFO L158 Benchmark]: Boogie Preprocessor took 47.95ms. Allocated memory is still 337.6MB. Free memory was 271.8MB in the beginning and 269.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 11:10:31,467 INFO L158 Benchmark]: RCFGBuilder took 468.46ms. Allocated memory is still 337.6MB. Free memory was 269.4MB in the beginning and 250.1MB in the end (delta: 19.3MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-12-21 11:10:31,467 INFO L158 Benchmark]: TraceAbstraction took 870915.06ms. Allocated memory was 337.6MB in the beginning and 417.3MB in the end (delta: 79.7MB). Free memory was 249.4MB in the beginning and 371.7MB in the end (delta: -122.3MB). Peak memory consumption was 197.0MB. Max. memory is 8.0GB. [2023-12-21 11:10:31,468 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 180.4MB. Free memory was 130.6MB in the beginning and 130.4MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 226.83ms. Allocated memory is still 337.6MB. Free memory was 285.7MB in the beginning and 273.6MB in the end (delta: 12.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.92ms. Allocated memory is still 337.6MB. Free memory was 273.6MB in the beginning and 271.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 47.95ms. Allocated memory is still 337.6MB. Free memory was 271.8MB in the beginning and 269.4MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 468.46ms. Allocated memory is still 337.6MB. Free memory was 269.4MB in the beginning and 250.1MB in the end (delta: 19.3MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * TraceAbstraction took 870915.06ms. Allocated memory was 337.6MB in the beginning and 417.3MB in the end (delta: 79.7MB). Free memory was 249.4MB in the beginning and 371.7MB in the end (delta: -122.3MB). Peak memory consumption was 197.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 38]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 38). Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 870.9s, OverallIterations: 10, TraceHistogramMax: 7, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 293.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 mSolverCounterUnknown, 672 SdHoareTripleChecker+Valid, 66.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 654 mSDsluCounter, 2335 SdHoareTripleChecker+Invalid, 65.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2060 mSDsCounter, 473 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7136 IncrementalHoareTripleChecker+Invalid, 7635 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 473 mSolverCounterUnsat, 275 mSDtfsCounter, 7136 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 793 GetRequests, 404 SyntacticMatches, 7 SemanticMatches, 382 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3447 ImplicationChecksByTransitivity, 527.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=196occurred in iteration=9, InterpolantAutomatonStates: 211, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 9 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 15.1s SatisfiabilityAnalysisTime, 558.9s InterpolantComputationTime, 496 NumberOfCodeBlocks, 496 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 585 ConstructedInterpolants, 175 QuantifiedInterpolants, 16391 SizeOfPredicates, 493 NumberOfNonLiveVariables, 3429 ConjunctsInSsa, 1654 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 283/436 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown