/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_cohendiv-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 05:52:30,331 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 05:52:30,382 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-16 05:52:30,386 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 05:52:30,387 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 05:52:30,405 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 05:52:30,406 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 05:52:30,406 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 05:52:30,407 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 05:52:30,409 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 05:52:30,409 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 05:52:30,409 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 05:52:30,410 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 05:52:30,410 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 05:52:30,410 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 05:52:30,410 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 05:52:30,411 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 05:52:30,411 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 05:52:30,411 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-16 05:52:30,411 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 05:52:30,412 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 05:52:30,415 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 05:52:30,416 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 05:52:30,416 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 05:52:30,416 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 05:52:30,416 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 05:52:30,416 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 05:52:30,417 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 05:52:30,418 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 05:52:30,418 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 05:52:30,419 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 05:52:30,419 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 05:52:30,419 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 05:52:30,419 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 05:52:30,419 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 05:52:30,419 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 05:52:30,420 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-16 05:52:30,420 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-16 05:52:30,420 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 05:52:30,420 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 05:52:30,420 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 05:52:30,421 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 05:52:30,421 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 05:52:30,421 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-16 05:52:30,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 05:52:30,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 05:52:30,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 05:52:30,682 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 05:52:30,683 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 05:52:30,684 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_cohendiv-ll.c [2023-12-16 05:52:31,811 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 05:52:32,007 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 05:52:32,009 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_cohendiv-ll.c [2023-12-16 05:52:32,017 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a42d87f0/876f16cc716441b688898a1015b05f34/FLAGed59447c9 [2023-12-16 05:52:32,031 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a42d87f0/876f16cc716441b688898a1015b05f34 [2023-12-16 05:52:32,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 05:52:32,035 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 05:52:32,038 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 05:52:32,039 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 05:52:32,042 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 05:52:32,043 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:52:32" (1/1) ... [2023-12-16 05:52:32,044 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@683ac30b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:32, skipping insertion in model container [2023-12-16 05:52:32,044 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:52:32" (1/1) ... [2023-12-16 05:52:32,070 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 05:52:32,186 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_cohendiv-ll.c[1136,1149] [2023-12-16 05:52:32,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 05:52:32,218 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 05:52:32,228 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_cohendiv-ll.c[1136,1149] [2023-12-16 05:52:32,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 05:52:32,251 INFO L206 MainTranslator]: Completed translation [2023-12-16 05:52:32,258 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:32 WrapperNode [2023-12-16 05:52:32,258 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 05:52:32,260 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 05:52:32,260 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 05:52:32,260 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 05:52:32,266 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:32" (1/1) ... [2023-12-16 05:52:32,279 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:32" (1/1) ... [2023-12-16 05:52:32,295 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2023-12-16 05:52:32,295 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 05:52:32,298 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 05:52:32,298 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 05:52:32,298 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 05:52:32,305 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:32" (1/1) ... [2023-12-16 05:52:32,306 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:32" (1/1) ... [2023-12-16 05:52:32,309 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:32" (1/1) ... [2023-12-16 05:52:32,331 INFO L175 MemorySlicer]: Split 49 memory accesses to 7 slices as follows [2, 5, 10, 8, 6, 8, 10]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 1, 1, 3, 2, 3, 2]. [2023-12-16 05:52:32,331 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:32" (1/1) ... [2023-12-16 05:52:32,331 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:32" (1/1) ... [2023-12-16 05:52:32,340 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:32" (1/1) ... [2023-12-16 05:52:32,342 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:32" (1/1) ... [2023-12-16 05:52:32,344 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:32" (1/1) ... [2023-12-16 05:52:32,345 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:32" (1/1) ... [2023-12-16 05:52:32,348 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 05:52:32,349 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 05:52:32,349 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 05:52:32,349 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 05:52:32,352 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:32" (1/1) ... [2023-12-16 05:52:32,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 05:52:32,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:52:32,376 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-16 05:52:32,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-16 05:52:32,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 05:52:32,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-16 05:52:32,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-16 05:52:32,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-16 05:52:32,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-16 05:52:32,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-16 05:52:32,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-12-16 05:52:32,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-12-16 05:52:32,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-16 05:52:32,404 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_52_0 [2023-12-16 05:52:32,404 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_52_0 [2023-12-16 05:52:32,404 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_32_to_55_0 [2023-12-16 05:52:32,404 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_32_to_55_0 [2023-12-16 05:52:32,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-16 05:52:32,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-16 05:52:32,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-16 05:52:32,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-16 05:52:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-16 05:52:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-12-16 05:52:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-12-16 05:52:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 05:52:32,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 05:52:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-16 05:52:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-16 05:52:32,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-16 05:52:32,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-16 05:52:32,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-16 05:52:32,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-12-16 05:52:32,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-12-16 05:52:32,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-16 05:52:32,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-16 05:52:32,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-16 05:52:32,508 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 05:52:32,512 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 05:52:32,710 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 05:52:32,736 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 05:52:32,736 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-16 05:52:32,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:52:32 BoogieIcfgContainer [2023-12-16 05:52:32,737 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 05:52:32,739 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 05:52:32,739 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 05:52:32,742 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 05:52:32,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:52:32" (1/3) ... [2023-12-16 05:52:32,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff757dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:52:32, skipping insertion in model container [2023-12-16 05:52:32,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:52:32" (2/3) ... [2023-12-16 05:52:32,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff757dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:52:32, skipping insertion in model container [2023-12-16 05:52:32,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:52:32" (3/3) ... [2023-12-16 05:52:32,744 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohendiv-ll.c [2023-12-16 05:52:32,761 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 05:52:32,761 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-16 05:52:32,799 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 05:52:32,804 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;@3f7faf0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 05:52:32,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-16 05:52:32,808 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-16 05:52:32,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-16 05:52:32,815 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:52:32,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:52:32,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:52:32,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:52:32,822 INFO L85 PathProgramCache]: Analyzing trace with hash 779716243, now seen corresponding path program 1 times [2023-12-16 05:52:32,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:52:32,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135742512] [2023-12-16 05:52:32,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:52:32,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:52:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:52:33,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:52:33,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135742512] [2023-12-16 05:52:33,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-16 05:52:33,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135949098] [2023-12-16 05:52:33,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:52:33,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:52:33,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:52:33,015 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:52:33,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-16 05:52:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:52:33,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-16 05:52:33,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:52:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 05:52:33,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 05:52:33,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135949098] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 05:52:33,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 05:52:33,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-16 05:52:33,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064149090] [2023-12-16 05:52:33,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:52:33,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-16 05:52:33,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:52:33,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-16 05:52:33,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-16 05:52:33,198 INFO L87 Difference]: Start difference. First operand has 40 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 05:52:33,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:52:33,243 INFO L93 Difference]: Finished difference Result 78 states and 114 transitions. [2023-12-16 05:52:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-16 05:52:33,246 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-16 05:52:33,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:52:33,252 INFO L225 Difference]: With dead ends: 78 [2023-12-16 05:52:33,253 INFO L226 Difference]: Without dead ends: 38 [2023-12-16 05:52:33,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-16 05:52:33,261 INFO L413 NwaCegarLoop]: 47 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, 47 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 [2023-12-16 05:52:33,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 05:52:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-16 05:52:33,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-12-16 05:52:33,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 26 states have internal predecessors, (26), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-16 05:52:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2023-12-16 05:52:33,306 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 10 [2023-12-16 05:52:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:52:33,307 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2023-12-16 05:52:33,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 05:52:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2023-12-16 05:52:33,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-16 05:52:33,309 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:52:33,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:52:33,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-16 05:52:33,514 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 [2023-12-16 05:52:33,514 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:52:33,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:52:33,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1459774613, now seen corresponding path program 1 times [2023-12-16 05:52:33,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:52:33,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920596910] [2023-12-16 05:52:33,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:52:33,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:52:33,581 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:52:33,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16393957] [2023-12-16 05:52:33,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:52:33,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:52:33,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:52:33,587 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:52:33,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-16 05:52:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:52:33,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-16 05:52:33,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:52:33,865 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 [2023-12-16 05:52:33,924 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 [2023-12-16 05:52:33,937 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 [2023-12-16 05:52:34,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-16 05:52:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 05:52:34,117 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 05:52:34,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:52:34,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920596910] [2023-12-16 05:52:34,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:52:34,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16393957] [2023-12-16 05:52:34,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16393957] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 05:52:34,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 05:52:34,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-16 05:52:34,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547020922] [2023-12-16 05:52:34,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:52:34,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-16 05:52:34,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:52:34,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-16 05:52:34,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-12-16 05:52:34,123 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 10 states, 8 states have (on average 1.0) internal successors, (8), 7 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 05:52:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:52:34,439 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2023-12-16 05:52:34,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-16 05:52:34,441 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.0) internal successors, (8), 7 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-16 05:52:34,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:52:34,446 INFO L225 Difference]: With dead ends: 55 [2023-12-16 05:52:34,450 INFO L226 Difference]: Without dead ends: 53 [2023-12-16 05:52:34,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-12-16 05:52:34,452 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 05:52:34,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 254 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 05:52:34,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-16 05:52:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2023-12-16 05:52:34,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-12-16 05:52:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2023-12-16 05:52:34,465 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 10 [2023-12-16 05:52:34,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:52:34,465 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2023-12-16 05:52:34,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.0) internal successors, (8), 7 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 05:52:34,466 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2023-12-16 05:52:34,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-16 05:52:34,466 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:52:34,466 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:52:34,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-16 05:52:34,673 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 [2023-12-16 05:52:34,673 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:52:34,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:52:34,674 INFO L85 PathProgramCache]: Analyzing trace with hash -860720822, now seen corresponding path program 1 times [2023-12-16 05:52:34,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:52:34,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815653096] [2023-12-16 05:52:34,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:52:34,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:52:34,702 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:52:34,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527534810] [2023-12-16 05:52:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:52:34,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:52:34,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:52:34,704 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:52:34,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-16 05:52:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:52:34,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 76 conjunts are in the unsatisfiable core [2023-12-16 05:52:34,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:52:34,865 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 [2023-12-16 05:52:34,869 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 [2023-12-16 05:52:34,941 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 [2023-12-16 05:52:34,948 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 [2023-12-16 05:52:35,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-16 05:52:35,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-16 05:52:35,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-16 05:52:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 05:52:35,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:52:37,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:52:37,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815653096] [2023-12-16 05:52:37,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:52:37,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527534810] [2023-12-16 05:52:37,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527534810] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:52:37,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 05:52:37,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-16 05:52:37,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34415596] [2023-12-16 05:52:37,467 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 05:52:37,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-16 05:52:37,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:52:37,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-16 05:52:37,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-12-16 05:52:37,469 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-16 05:52:38,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:52:38,077 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2023-12-16 05:52:38,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-16 05:52:38,078 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-12-16 05:52:38,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:52:38,079 INFO L225 Difference]: With dead ends: 81 [2023-12-16 05:52:38,079 INFO L226 Difference]: Without dead ends: 79 [2023-12-16 05:52:38,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-12-16 05:52:38,081 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 41 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-16 05:52:38,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 186 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-16 05:52:38,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-16 05:52:38,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2023-12-16 05:52:38,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 47 states have (on average 1.127659574468085) internal successors, (53), 52 states have internal predecessors, (53), 20 states have call successors, (20), 8 states have call predecessors, (20), 8 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2023-12-16 05:52:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2023-12-16 05:52:38,094 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 16 [2023-12-16 05:52:38,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:52:38,096 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2023-12-16 05:52:38,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-16 05:52:38,096 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2023-12-16 05:52:38,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-16 05:52:38,097 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:52:38,097 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:52:38,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-16 05:52:38,298 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 [2023-12-16 05:52:38,298 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:52:38,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:52:38,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1771378809, now seen corresponding path program 1 times [2023-12-16 05:52:38,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:52:38,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128666100] [2023-12-16 05:52:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:52:38,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:52:38,346 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:52:38,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939411392] [2023-12-16 05:52:38,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:52:38,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:52:38,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:52:38,351 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:52:38,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-16 05:52:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:52:38,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 65 conjunts are in the unsatisfiable core [2023-12-16 05:52:38,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:52:38,482 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 [2023-12-16 05:52:38,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 05:52:38,539 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 [2023-12-16 05:52:38,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-16 05:52:38,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-16 05:52:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 05:52:38,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:52:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-16 05:52:38,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:52:38,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128666100] [2023-12-16 05:52:38,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:52:38,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939411392] [2023-12-16 05:52:38,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939411392] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-16 05:52:38,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-16 05:52:38,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 18 [2023-12-16 05:52:38,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628241838] [2023-12-16 05:52:38,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:52:38,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-16 05:52:38,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:52:38,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-16 05:52:38,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2023-12-16 05:52:38,779 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-16 05:52:39,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:52:39,001 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2023-12-16 05:52:39,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-16 05:52:39,001 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-12-16 05:52:39,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:52:39,004 INFO L225 Difference]: With dead ends: 96 [2023-12-16 05:52:39,004 INFO L226 Difference]: Without dead ends: 94 [2023-12-16 05:52:39,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-12-16 05:52:39,005 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 21 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 05:52:39,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 189 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 05:52:39,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-16 05:52:39,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2023-12-16 05:52:39,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 58 states have internal predecessors, (59), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2023-12-16 05:52:39,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2023-12-16 05:52:39,032 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 26 [2023-12-16 05:52:39,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:52:39,032 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2023-12-16 05:52:39,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-16 05:52:39,032 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2023-12-16 05:52:39,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-16 05:52:39,033 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:52:39,033 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:52:39,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-16 05:52:39,239 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 [2023-12-16 05:52:39,239 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:52:39,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:52:39,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1321931825, now seen corresponding path program 1 times [2023-12-16 05:52:39,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:52:39,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391357172] [2023-12-16 05:52:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:52:39,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:52:39,258 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:52:39,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062578070] [2023-12-16 05:52:39,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:52:39,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:52:39,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:52:39,260 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:52:39,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-16 05:52:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:52:39,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-16 05:52:39,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:52:39,419 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 [2023-12-16 05:52:39,424 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 [2023-12-16 05:52:39,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 05:52:39,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-16 05:52:39,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-16 05:52:39,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-16 05:52:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 05:52:39,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:52:39,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:52:39,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391357172] [2023-12-16 05:52:39,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:52:39,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062578070] [2023-12-16 05:52:39,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062578070] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:52:39,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 05:52:39,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-12-16 05:52:39,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778352203] [2023-12-16 05:52:39,718 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 05:52:39,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-16 05:52:39,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:52:39,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-16 05:52:39,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-12-16 05:52:39,721 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-16 05:52:43,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-16 05:52:44,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:52:44,151 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2023-12-16 05:52:44,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-16 05:52:44,151 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-12-16 05:52:44,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:52:44,152 INFO L225 Difference]: With dead ends: 92 [2023-12-16 05:52:44,152 INFO L226 Difference]: Without dead ends: 82 [2023-12-16 05:52:44,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-12-16 05:52:44,153 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-12-16 05:52:44,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 56 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 330 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2023-12-16 05:52:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-16 05:52:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-12-16 05:52:44,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 56 states have internal predecessors, (57), 19 states have call successors, (19), 10 states have call predecessors, (19), 10 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2023-12-16 05:52:44,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2023-12-16 05:52:44,172 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 26 [2023-12-16 05:52:44,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:52:44,172 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2023-12-16 05:52:44,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-16 05:52:44,173 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2023-12-16 05:52:44,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-16 05:52:44,173 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:52:44,173 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:52:44,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-16 05:52:44,379 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 [2023-12-16 05:52:44,380 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:52:44,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:52:44,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1358287025, now seen corresponding path program 1 times [2023-12-16 05:52:44,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:52:44,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822476628] [2023-12-16 05:52:44,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:52:44,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:52:44,417 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:52:44,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601123665] [2023-12-16 05:52:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:52:44,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:52:44,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:52:44,428 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:52:44,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-16 05:52:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:52:44,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 108 conjunts are in the unsatisfiable core [2023-12-16 05:52:44,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:52:44,601 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 [2023-12-16 05:52:44,606 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 [2023-12-16 05:52:44,645 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 [2023-12-16 05:52:44,658 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 [2023-12-16 05:52:45,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-16 05:52:45,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-16 05:52:45,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-16 05:52:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-16 05:52:45,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:52:45,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:52:45,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822476628] [2023-12-16 05:52:45,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:52:45,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601123665] [2023-12-16 05:52:45,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601123665] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:52:45,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 05:52:45,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-12-16 05:52:45,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139030862] [2023-12-16 05:52:45,402 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 05:52:45,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-16 05:52:45,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:52:45,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-16 05:52:45,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-12-16 05:52:45,404 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-16 05:52:46,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:52:46,041 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2023-12-16 05:52:46,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-16 05:52:46,041 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2023-12-16 05:52:46,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:52:46,042 INFO L225 Difference]: With dead ends: 91 [2023-12-16 05:52:46,042 INFO L226 Difference]: Without dead ends: 89 [2023-12-16 05:52:46,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2023-12-16 05:52:46,044 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 33 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-16 05:52:46,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 187 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-16 05:52:46,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-16 05:52:46,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2023-12-16 05:52:46,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 59 states have internal predecessors, (60), 19 states have call successors, (19), 11 states have call predecessors, (19), 11 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2023-12-16 05:52:46,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2023-12-16 05:52:46,059 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 32 [2023-12-16 05:52:46,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:52:46,059 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2023-12-16 05:52:46,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-16 05:52:46,060 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2023-12-16 05:52:46,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-16 05:52:46,060 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:52:46,060 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2023-12-16 05:52:46,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-16 05:52:46,267 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 [2023-12-16 05:52:46,268 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:52:46,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:52:46,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1087391719, now seen corresponding path program 1 times [2023-12-16 05:52:46,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:52:46,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839863722] [2023-12-16 05:52:46,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:52:46,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:52:46,293 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:52:46,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272297827] [2023-12-16 05:52:46,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:52:46,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:52:46,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:52:46,294 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:52:46,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-16 05:52:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:52:46,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-16 05:52:46,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:52:46,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-16 05:52:46,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-16 05:52:46,479 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 [2023-12-16 05:52:46,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-16 05:52:46,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-16 05:52:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-16 05:52:46,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:52:46,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-12-16 05:52:47,041 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-16 05:52:47,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:52:47,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839863722] [2023-12-16 05:52:47,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:52:47,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272297827] [2023-12-16 05:52:47,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272297827] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-16 05:52:47,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-16 05:52:47,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 27 [2023-12-16 05:52:47,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827665967] [2023-12-16 05:52:47,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:52:47,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-16 05:52:47,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:52:47,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-16 05:52:47,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2023-12-16 05:52:47,044 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 14 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-16 05:52:47,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:52:47,431 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2023-12-16 05:52:47,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-16 05:52:47,432 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-12-16 05:52:47,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:52:47,433 INFO L225 Difference]: With dead ends: 93 [2023-12-16 05:52:47,433 INFO L226 Difference]: Without dead ends: 91 [2023-12-16 05:52:47,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2023-12-16 05:52:47,436 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 28 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-16 05:52:47,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 252 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-16 05:52:47,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-16 05:52:47,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2023-12-16 05:52:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 62 states have internal predecessors, (63), 19 states have call successors, (19), 12 states have call predecessors, (19), 12 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2023-12-16 05:52:47,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2023-12-16 05:52:47,452 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 38 [2023-12-16 05:52:47,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:52:47,452 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2023-12-16 05:52:47,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 5 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-16 05:52:47,452 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2023-12-16 05:52:47,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-16 05:52:47,453 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:52:47,453 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 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] [2023-12-16 05:52:47,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-16 05:52:47,659 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 [2023-12-16 05:52:47,660 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:52:47,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:52:47,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1075242647, now seen corresponding path program 1 times [2023-12-16 05:52:47,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:52:47,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123771172] [2023-12-16 05:52:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:52:47,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:52:47,675 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:52:47,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18130686] [2023-12-16 05:52:47,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:52:47,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:52:47,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:52:47,677 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) [2023-12-16 05:52:47,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-16 05:52:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:52:47,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-16 05:52:47,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:52:47,810 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 [2023-12-16 05:52:51,931 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_41_to_52_0_~a.offset_BEFORE_CALL_2 Int) (v_func_to_recursive_line_41_to_52_0_~a.base_BEFORE_CALL_2 Int) (v_func_to_recursive_line_41_to_52_0_~y.base_BEFORE_CALL_3 Int) (v_func_to_recursive_line_41_to_52_0_~b.offset_BEFORE_CALL_2 Int) (v_func_to_recursive_line_41_to_52_0_~b.base_BEFORE_CALL_2 Int)) (<= (* (select (select |c_#memory_int#2| v_func_to_recursive_line_41_to_52_0_~y.base_BEFORE_CALL_3) 0) (select (select |c_#memory_int#3| v_func_to_recursive_line_41_to_52_0_~a.base_BEFORE_CALL_2) v_func_to_recursive_line_41_to_52_0_~a.offset_BEFORE_CALL_2)) (select (select |c_#memory_int#5| v_func_to_recursive_line_41_to_52_0_~b.base_BEFORE_CALL_2) v_func_to_recursive_line_41_to_52_0_~b.offset_BEFORE_CALL_2))) is different from true [2023-12-16 05:52:56,015 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_41_to_52_0_~a.offset_BEFORE_CALL_3 Int) (v_func_to_recursive_line_41_to_52_0_~a.base_BEFORE_CALL_3 Int) (v_func_to_recursive_line_41_to_52_0_~y.base_BEFORE_CALL_4 Int) (v_func_to_recursive_line_41_to_52_0_~b.offset_BEFORE_CALL_3 Int) (v_func_to_recursive_line_41_to_52_0_~b.base_BEFORE_CALL_3 Int)) (<= (* (select (select |c_#memory_int#2| v_func_to_recursive_line_41_to_52_0_~y.base_BEFORE_CALL_4) 0) (select (select |c_#memory_int#3| v_func_to_recursive_line_41_to_52_0_~a.base_BEFORE_CALL_3) v_func_to_recursive_line_41_to_52_0_~a.offset_BEFORE_CALL_3)) (select (select |c_#memory_int#5| v_func_to_recursive_line_41_to_52_0_~b.base_BEFORE_CALL_3) v_func_to_recursive_line_41_to_52_0_~b.offset_BEFORE_CALL_3))) is different from true [2023-12-16 05:53:04,153 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 25 treesize of output 17 [2023-12-16 05:53:04,191 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 27 treesize of output 19 [2023-12-16 05:53:04,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-16 05:53:04,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-16 05:53:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 10 not checked. [2023-12-16 05:53:08,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:53:08,346 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 35 treesize of output 27 [2023-12-16 05:53:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-16 05:53:08,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:53:08,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123771172] [2023-12-16 05:53:08,533 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:53:08,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18130686] [2023-12-16 05:53:08,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18130686] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:53:08,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 05:53:08,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 25 [2023-12-16 05:53:08,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428392212] [2023-12-16 05:53:08,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 05:53:08,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-16 05:53:08,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:53:08,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-16 05:53:08,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=441, Unknown=5, NotChecked=86, Total=600 [2023-12-16 05:53:08,535 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand has 25 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 8 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-16 05:53:12,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-16 05:53:16,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-16 05:53:20,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-16 05:53:32,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-16 05:53:36,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] Received shutdown request... [2023-12-16 05:53:46,501 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 05:53:46,501 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 05:53:47,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-16 05:53:47,703 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 [2023-12-16 05:53:47,721 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 [2023-12-16 05:53:47,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=8, NotChecked=130, Total=1260 [2023-12-16 05:53:47,722 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 31 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 20 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 20.5s IncrementalHoareTripleChecker+Time [2023-12-16 05:53:47,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 194 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 428 Invalid, 5 Unknown, 122 Unchecked, 20.5s Time] [2023-12-16 05:53:47,723 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-16 05:53:47,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-16 05:53:47,724 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-12-16 05:53:47,727 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:53:47,729 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-16 05:53:47,731 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 05:53:47 BoogieIcfgContainer [2023-12-16 05:53:47,731 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-16 05:53:47,731 INFO L158 Benchmark]: Toolchain (without parser) took 75696.58ms. Allocated memory was 194.0MB in the beginning and 302.0MB in the end (delta: 108.0MB). Free memory was 141.2MB in the beginning and 152.6MB in the end (delta: -11.4MB). Peak memory consumption was 96.9MB. Max. memory is 8.0GB. [2023-12-16 05:53:47,732 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 194.0MB. Free memory is still 142.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 05:53:47,732 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.10ms. Allocated memory is still 194.0MB. Free memory was 140.8MB in the beginning and 128.9MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-16 05:53:47,732 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.39ms. Allocated memory is still 194.0MB. Free memory was 128.9MB in the beginning and 127.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 05:53:47,732 INFO L158 Benchmark]: Boogie Preprocessor took 50.33ms. Allocated memory is still 194.0MB. Free memory was 127.2MB in the beginning and 124.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 05:53:47,733 INFO L158 Benchmark]: RCFGBuilder took 387.90ms. Allocated memory is still 194.0MB. Free memory was 124.7MB in the beginning and 104.8MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-12-16 05:53:47,733 INFO L158 Benchmark]: TraceAbstraction took 74992.18ms. Allocated memory was 194.0MB in the beginning and 302.0MB in the end (delta: 108.0MB). Free memory was 104.1MB in the beginning and 152.6MB in the end (delta: -48.5MB). Peak memory consumption was 60.2MB. Max. memory is 8.0GB. [2023-12-16 05:53:47,734 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 194.0MB. Free memory is still 142.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 220.10ms. Allocated memory is still 194.0MB. Free memory was 140.8MB in the beginning and 128.9MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 35.39ms. Allocated memory is still 194.0MB. Free memory was 128.9MB in the beginning and 127.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 50.33ms. Allocated memory is still 194.0MB. Free memory was 127.2MB in the beginning and 124.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 387.90ms. Allocated memory is still 194.0MB. Free memory was 124.7MB in the beginning and 104.8MB in the end (delta: 19.9MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * TraceAbstraction took 74992.18ms. Allocated memory was 194.0MB in the beginning and 302.0MB in the end (delta: 108.0MB). Free memory was 104.1MB in the beginning and 152.6MB in the end (delta: -48.5MB). Peak memory consumption was 60.2MB. 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: 41]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 41). Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 74.9s, OverallIterations: 8, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 45.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 222 SdHoareTripleChecker+Valid, 26.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 210 mSDsluCounter, 1365 SdHoareTripleChecker+Invalid, 25.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 122 IncrementalHoareTripleChecker+Unchecked, 1139 mSDsCounter, 97 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2123 IncrementalHoareTripleChecker+Invalid, 2349 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 97 mSolverCounterUnsat, 226 mSDtfsCounter, 2123 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 364 GetRequests, 186 SyntacticMatches, 17 SemanticMatches, 161 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 40.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=7, InterpolantAutomatonStates: 80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 26.0s InterpolantComputationTime, 213 NumberOfCodeBlocks, 213 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 301 ConstructedInterpolants, 60 QuantifiedInterpolants, 3269 SizeOfPredicates, 185 NumberOfNonLiveVariables, 2051 ConjunctsInSsa, 440 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 152/208 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