/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_hard2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 05:53:50,897 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 05:53:50,946 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 05:53:50,950 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 05:53:50,950 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 05:53:50,968 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 05:53:50,969 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 05:53:50,969 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 05:53:50,970 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 05:53:50,970 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 05:53:50,970 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 05:53:50,971 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 05:53:50,971 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 05:53:50,971 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 05:53:50,972 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 05:53:50,972 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 05:53:50,972 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 05:53:50,973 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 05:53:50,973 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-16 05:53:50,973 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 05:53:50,974 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 05:53:50,974 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 05:53:50,974 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 05:53:50,975 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 05:53:50,975 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 05:53:50,975 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 05:53:50,975 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 05:53:50,976 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 05:53:50,976 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 05:53:50,976 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 05:53:50,977 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 05:53:50,977 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 05:53:50,977 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 05:53:50,977 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 05:53:50,978 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 05:53:50,978 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 05:53:50,978 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-16 05:53:50,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-16 05:53:50,979 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 05:53:50,979 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 05:53:50,979 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 05:53:50,980 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 05:53:50,980 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 05:53:50,980 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-16 05:53:51,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 05:53:51,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 05:53:51,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 05:53:51,218 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 05:53:51,219 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 05:53:51,220 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_hard2.c [2023-12-16 05:53:52,345 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 05:53:52,478 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 05:53:52,478 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_hard2.c [2023-12-16 05:53:52,484 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9fcc94c7/9bc10ed50ee448669db4965a360adbfc/FLAG27017af5d [2023-12-16 05:53:52,502 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9fcc94c7/9bc10ed50ee448669db4965a360adbfc [2023-12-16 05:53:52,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 05:53:52,505 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 05:53:52,508 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 05:53:52,508 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 05:53:52,512 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 05:53:52,512 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:53:52" (1/1) ... [2023-12-16 05:53:52,513 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b6338e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:53:52, skipping insertion in model container [2023-12-16 05:53:52,513 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:53:52" (1/1) ... [2023-12-16 05:53:52,538 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 05:53:52,678 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_hard2.c[1067,1080] [2023-12-16 05:53:52,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 05:53:52,713 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 05:53:52,725 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_hard2.c[1067,1080] [2023-12-16 05:53:52,739 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 05:53:52,753 INFO L206 MainTranslator]: Completed translation [2023-12-16 05:53:52,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:53:52 WrapperNode [2023-12-16 05:53:52,754 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 05:53:52,755 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 05:53:52,755 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 05:53:52,755 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 05:53:52,761 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:53:52" (1/1) ... [2023-12-16 05:53:52,781 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:53:52" (1/1) ... [2023-12-16 05:53:52,797 INFO L138 Inliner]: procedures = 17, calls = 90, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 78 [2023-12-16 05:53:52,797 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 05:53:52,798 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 05:53:52,798 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 05:53:52,798 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 05:53:52,806 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:53:52" (1/1) ... [2023-12-16 05:53:52,806 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:53:52" (1/1) ... [2023-12-16 05:53:52,809 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:53:52" (1/1) ... [2023-12-16 05:53:52,824 INFO L175 MemorySlicer]: Split 56 memory accesses to 8 slices as follows [2, 8, 12, 8, 6, 9, 6, 5]. 21 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 0, 3, 2, 1, 3, 2, 1]. [2023-12-16 05:53:52,825 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:53:52" (1/1) ... [2023-12-16 05:53:52,825 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:53:52" (1/1) ... [2023-12-16 05:53:52,835 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:53:52" (1/1) ... [2023-12-16 05:53:52,837 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:53:52" (1/1) ... [2023-12-16 05:53:52,838 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:53:52" (1/1) ... [2023-12-16 05:53:52,839 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:53:52" (1/1) ... [2023-12-16 05:53:52,842 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 05:53:52,843 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 05:53:52,843 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 05:53:52,843 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 05:53:52,844 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:53:52" (1/1) ... [2023-12-16 05:53:52,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 05:53:52,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:53:52,899 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 05:53:52,901 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 05:53:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 05:53:52,922 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_50_0 [2023-12-16 05:53:52,923 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_50_0 [2023-12-16 05:53:52,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-16 05:53:52,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-16 05:53:52,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-16 05:53:52,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-16 05:53:52,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-16 05:53:52,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-12-16 05:53:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-12-16 05:53:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-12-16 05:53:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-16 05:53:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-16 05:53:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-16 05:53:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-16 05:53:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-16 05:53:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-16 05:53:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-12-16 05:53:52,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-12-16 05:53:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-12-16 05:53:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_30_to_37_0 [2023-12-16 05:53:52,925 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_30_to_37_0 [2023-12-16 05:53:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 05:53:52,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 05:53:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-16 05:53:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-16 05:53:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-16 05:53:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-16 05:53:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-16 05:53:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-12-16 05:53:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-12-16 05:53:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-12-16 05:53:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-16 05:53:52,926 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-16 05:53:52,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-16 05:53:53,018 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 05:53:53,019 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 05:53:53,306 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 05:53:53,346 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 05:53:53,346 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-16 05:53:53,346 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:53:53 BoogieIcfgContainer [2023-12-16 05:53:53,347 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 05:53:53,348 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 05:53:53,349 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 05:53:53,351 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 05:53:53,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:53:52" (1/3) ... [2023-12-16 05:53:53,356 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c7f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:53:53, skipping insertion in model container [2023-12-16 05:53:53,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:53:52" (2/3) ... [2023-12-16 05:53:53,356 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c7f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:53:53, skipping insertion in model container [2023-12-16 05:53:53,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:53:53" (3/3) ... [2023-12-16 05:53:53,357 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard2.c [2023-12-16 05:53:53,370 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 05:53:53,370 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-16 05:53:53,406 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 05:53:53,412 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;@6df085f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 05:53:53,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-16 05:53:53,416 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 25 states have internal predecessors, (29), 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 05:53:53,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-16 05:53:53,422 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:53:53,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:53:53,423 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:53:53,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:53:53,427 INFO L85 PathProgramCache]: Analyzing trace with hash -93468211, now seen corresponding path program 1 times [2023-12-16 05:53:53,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:53:53,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927259149] [2023-12-16 05:53:53,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:53:53,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:53:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:53:53,978 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 05:53:53,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:53:53,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927259149] [2023-12-16 05:53:53,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927259149] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 05:53:53,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 05:53:53,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-16 05:53:53,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399090222] [2023-12-16 05:53:53,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:53:53,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-16 05:53:53,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:53:54,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-16 05:53:54,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-16 05:53:54,010 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 25 states have internal predecessors, (29), 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 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 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 05:53:54,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:53:54,184 INFO L93 Difference]: Finished difference Result 78 states and 114 transitions. [2023-12-16 05:53:54,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-16 05:53:54,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 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 8 [2023-12-16 05:53:54,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:53:54,193 INFO L225 Difference]: With dead ends: 78 [2023-12-16 05:53:54,193 INFO L226 Difference]: Without dead ends: 40 [2023-12-16 05:53:54,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-16 05:53:54,199 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 21 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 05:53:54,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 215 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 05:53:54,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-16 05:53:54,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-12-16 05:53:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 27 states have internal predecessors, (28), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-16 05:53:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2023-12-16 05:53:54,233 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 8 [2023-12-16 05:53:54,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:53:54,234 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2023-12-16 05:53:54,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 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 05:53:54,234 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2023-12-16 05:53:54,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-16 05:53:54,235 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:53:54,235 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:53:54,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-16 05:53:54,235 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:53:54,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:53:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1672762703, now seen corresponding path program 1 times [2023-12-16 05:53:54,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:53:54,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619310870] [2023-12-16 05:53:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:53:54,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:53:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:53:54,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-16 05:53:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:53:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 05:53:54,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:53:54,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619310870] [2023-12-16 05:53:54,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619310870] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 05:53:54,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 05:53:54,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-16 05:53:54,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465585961] [2023-12-16 05:53:54,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:53:54,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-16 05:53:54,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:53:54,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-16 05:53:54,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-16 05:53:54,550 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 05:53:54,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:53:54,718 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2023-12-16 05:53:54,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-16 05:53:54,719 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 14 [2023-12-16 05:53:54,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:53:54,721 INFO L225 Difference]: With dead ends: 46 [2023-12-16 05:53:54,721 INFO L226 Difference]: Without dead ends: 44 [2023-12-16 05:53:54,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-16 05:53:54,723 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 18 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 05:53:54,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 213 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 05:53:54,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-16 05:53:54,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-12-16 05:53:54,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-16 05:53:54,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2023-12-16 05:53:54,744 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 14 [2023-12-16 05:53:54,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:53:54,744 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2023-12-16 05:53:54,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 05:53:54,744 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2023-12-16 05:53:54,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-16 05:53:54,745 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:53:54,746 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:53:54,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-16 05:53:54,746 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:53:54,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:53:54,748 INFO L85 PathProgramCache]: Analyzing trace with hash 588742735, now seen corresponding path program 1 times [2023-12-16 05:53:54,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:53:54,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4411026] [2023-12-16 05:53:54,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:53:54,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:53:54,787 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:53:54,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312245735] [2023-12-16 05:53:54,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:53:54,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:53:54,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:53:54,796 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 05:53:54,822 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 05:53:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:53:54,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-16 05:53:54,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:53:54,996 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 05:53:55,003 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 05:53:55,012 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 05:53:55,021 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 05:53:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 05:53:55,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:53:55,901 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 05:53:55,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:53:55,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4411026] [2023-12-16 05:53:55,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:53:55,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312245735] [2023-12-16 05:53:55,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312245735] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:53:55,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 05:53:55,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-12-16 05:53:55,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516171866] [2023-12-16 05:53:55,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 05:53:55,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-16 05:53:55,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:53:55,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-16 05:53:55,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2023-12-16 05:53:55,904 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 states have internal predecessors, (27), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-16 05:53:56,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:53:56,867 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2023-12-16 05:53:56,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-16 05:53:56,868 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 states have internal predecessors, (27), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2023-12-16 05:53:56,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:53:56,870 INFO L225 Difference]: With dead ends: 97 [2023-12-16 05:53:56,870 INFO L226 Difference]: Without dead ends: 95 [2023-12-16 05:53:56,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2023-12-16 05:53:56,871 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 74 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-16 05:53:56,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 217 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-16 05:53:56,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-16 05:53:56,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2023-12-16 05:53:56,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 61 states have internal predecessors, (65), 19 states have call successors, (19), 12 states have call predecessors, (19), 13 states have return successors, (20), 18 states have call predecessors, (20), 17 states have call successors, (20) [2023-12-16 05:53:56,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2023-12-16 05:53:56,888 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 20 [2023-12-16 05:53:56,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:53:56,888 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2023-12-16 05:53:56,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 states have internal predecessors, (27), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-16 05:53:56,888 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2023-12-16 05:53:56,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-16 05:53:56,889 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:53:56,889 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 05:53:56,899 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 05:53:57,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:53:57,098 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:53:57,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:53:57,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1249325219, now seen corresponding path program 1 times [2023-12-16 05:53:57,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:53:57,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694564863] [2023-12-16 05:53:57,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:53:57,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:53:57,126 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:53:57,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204377628] [2023-12-16 05:53:57,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:53:57,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:53:57,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:53:57,128 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 05:53:57,132 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 05:53:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:53:57,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 92 conjunts are in the unsatisfiable core [2023-12-16 05:53:57,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:53:57,309 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 05:53:57,315 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 05:53:57,321 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 05:53:57,330 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 05:53:57,739 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 05:53:57,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-16 05:53:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-16 05:53:57,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:53:58,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:53:58,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694564863] [2023-12-16 05:53:58,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:53:58,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204377628] [2023-12-16 05:53:58,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204377628] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:53:58,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 05:53:58,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-12-16 05:53:58,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55045377] [2023-12-16 05:53:58,942 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 05:53:58,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-16 05:53:58,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:53:58,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-16 05:53:58,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-12-16 05:53:58,943 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand has 14 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-16 05:53:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:53:59,618 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2023-12-16 05:53:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-16 05:53:59,618 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2023-12-16 05:53:59,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:53:59,620 INFO L225 Difference]: With dead ends: 130 [2023-12-16 05:53:59,620 INFO L226 Difference]: Without dead ends: 128 [2023-12-16 05:53:59,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2023-12-16 05:53:59,622 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-16 05:53:59,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 153 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-16 05:53:59,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-16 05:53:59,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2023-12-16 05:53:59,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 77 states have (on average 1.12987012987013) internal successors, (87), 81 states have internal predecessors, (87), 24 states have call successors, (24), 16 states have call predecessors, (24), 18 states have return successors, (29), 23 states have call predecessors, (29), 21 states have call successors, (29) [2023-12-16 05:53:59,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 140 transitions. [2023-12-16 05:53:59,645 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 140 transitions. Word has length 32 [2023-12-16 05:53:59,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:53:59,645 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 140 transitions. [2023-12-16 05:53:59,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-16 05:53:59,645 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 140 transitions. [2023-12-16 05:53:59,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-16 05:53:59,646 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:53:59,646 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 05:53:59,656 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 05:53:59,853 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,SelfDestructingSolverStorable3 [2023-12-16 05:53:59,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:53:59,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:53:59,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1316300518, now seen corresponding path program 1 times [2023-12-16 05:53:59,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:53:59,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498786773] [2023-12-16 05:53:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:53:59,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:53:59,870 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:53:59,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832306306] [2023-12-16 05:53:59,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:53:59,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:53:59,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:53:59,872 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 05:53:59,891 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 05:53:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:53:59,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 91 conjunts are in the unsatisfiable core [2023-12-16 05:53:59,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:54:00,008 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 05:54:00,013 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 05:54:00,024 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 05:54:00,032 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 05:54:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-16 05:54:00,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:54:06,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:54:06,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498786773] [2023-12-16 05:54:06,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:54:06,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832306306] [2023-12-16 05:54:06,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832306306] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:54:06,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 05:54:06,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-12-16 05:54:06,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246875991] [2023-12-16 05:54:06,653 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 05:54:06,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-16 05:54:06,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:54:06,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-16 05:54:06,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=525, Unknown=1, NotChecked=0, Total=600 [2023-12-16 05:54:06,654 INFO L87 Difference]: Start difference. First operand 120 states and 140 transitions. Second operand has 17 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-16 05:54:07,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:54:07,815 INFO L93 Difference]: Finished difference Result 130 states and 147 transitions. [2023-12-16 05:54:07,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-16 05:54:07,815 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 38 [2023-12-16 05:54:07,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:54:07,817 INFO L225 Difference]: With dead ends: 130 [2023-12-16 05:54:07,817 INFO L226 Difference]: Without dead ends: 128 [2023-12-16 05:54:07,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=238, Invalid=1483, Unknown=1, NotChecked=0, Total=1722 [2023-12-16 05:54:07,818 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 113 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-16 05:54:07,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 138 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 448 Invalid, 1 Unknown, 0 Unchecked, 0.5s Time] [2023-12-16 05:54:07,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-16 05:54:07,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2023-12-16 05:54:07,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 80 states have (on average 1.125) internal successors, (90), 84 states have internal predecessors, (90), 24 states have call successors, (24), 17 states have call predecessors, (24), 19 states have return successors, (29), 23 states have call predecessors, (29), 21 states have call successors, (29) [2023-12-16 05:54:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2023-12-16 05:54:07,842 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 38 [2023-12-16 05:54:07,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:54:07,842 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2023-12-16 05:54:07,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-16 05:54:07,843 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2023-12-16 05:54:07,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-16 05:54:07,844 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:54:07,844 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, 1, 1, 1] [2023-12-16 05:54:07,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-16 05:54:08,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:08,051 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:54:08,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:54:08,051 INFO L85 PathProgramCache]: Analyzing trace with hash -413636343, now seen corresponding path program 1 times [2023-12-16 05:54:08,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:54:08,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967909666] [2023-12-16 05:54:08,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:08,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:54:08,067 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:54:08,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259006160] [2023-12-16 05:54:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:08,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:08,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:54:08,069 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 05:54:08,071 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 05:54:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:54:08,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-16 05:54:08,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:54:08,207 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 05:54:08,212 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 05:54:08,217 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 05:54:08,507 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 05:54:08,580 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 05:54:08,591 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 05:54:08,594 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 05:54:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-16 05:54:08,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:54:08,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:54:08,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967909666] [2023-12-16 05:54:08,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:54:08,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259006160] [2023-12-16 05:54:08,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259006160] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:54:08,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 05:54:08,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-12-16 05:54:08,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677491218] [2023-12-16 05:54:08,763 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 05:54:08,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-16 05:54:08,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:54:08,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-16 05:54:08,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-12-16 05:54:08,764 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-16 05:54:09,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:54:09,512 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2023-12-16 05:54:09,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-16 05:54:09,513 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 48 [2023-12-16 05:54:09,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:54:09,516 INFO L225 Difference]: With dead ends: 134 [2023-12-16 05:54:09,517 INFO L226 Difference]: Without dead ends: 130 [2023-12-16 05:54:09,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2023-12-16 05:54:09,518 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 80 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-16 05:54:09,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 92 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-16 05:54:09,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-16 05:54:09,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2023-12-16 05:54:09,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 83 states have (on average 1.108433734939759) internal successors, (92), 86 states have internal predecessors, (92), 24 states have call successors, (24), 18 states have call predecessors, (24), 20 states have return successors, (30), 23 states have call predecessors, (30), 21 states have call successors, (30) [2023-12-16 05:54:09,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 146 transitions. [2023-12-16 05:54:09,560 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 146 transitions. Word has length 48 [2023-12-16 05:54:09,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:54:09,561 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 146 transitions. [2023-12-16 05:54:09,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-16 05:54:09,561 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 146 transitions. [2023-12-16 05:54:09,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-16 05:54:09,562 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:54:09,562 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:54:09,572 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 05:54:09,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:09,769 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:54:09,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:54:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1419410849, now seen corresponding path program 1 times [2023-12-16 05:54:09,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:54:09,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284098918] [2023-12-16 05:54:09,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:09,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:54:09,792 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:54:09,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984604531] [2023-12-16 05:54:09,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:09,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:09,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:54:09,794 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 05:54:09,821 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 05:54:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:54:09,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-16 05:54:09,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:54:09,955 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 05:54:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-16 05:54:10,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 05:54:10,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:54:10,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284098918] [2023-12-16 05:54:10,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:54:10,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984604531] [2023-12-16 05:54:10,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984604531] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 05:54:10,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 05:54:10,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-16 05:54:10,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505966302] [2023-12-16 05:54:10,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:54:10,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-16 05:54:10,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:54:10,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-16 05:54:10,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-16 05:54:10,055 INFO L87 Difference]: Start difference. First operand 128 states and 146 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-16 05:54:10,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:54:10,269 INFO L93 Difference]: Finished difference Result 178 states and 204 transitions. [2023-12-16 05:54:10,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-16 05:54:10,270 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2023-12-16 05:54:10,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:54:10,271 INFO L225 Difference]: With dead ends: 178 [2023-12-16 05:54:10,271 INFO L226 Difference]: Without dead ends: 130 [2023-12-16 05:54:10,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-12-16 05:54:10,272 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 05:54:10,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 98 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 05:54:10,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-16 05:54:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2023-12-16 05:54:10,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 85 states have internal predecessors, (90), 24 states have call successors, (24), 18 states have call predecessors, (24), 19 states have return successors, (26), 23 states have call predecessors, (26), 21 states have call successors, (26) [2023-12-16 05:54:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 140 transitions. [2023-12-16 05:54:10,293 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 140 transitions. Word has length 49 [2023-12-16 05:54:10,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:54:10,294 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 140 transitions. [2023-12-16 05:54:10,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-16 05:54:10,294 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 140 transitions. [2023-12-16 05:54:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-16 05:54:10,295 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:54:10,295 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:54:10,304 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 05:54:10,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:10,501 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:54:10,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:54:10,501 INFO L85 PathProgramCache]: Analyzing trace with hash -209116920, now seen corresponding path program 1 times [2023-12-16 05:54:10,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:54:10,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743262332] [2023-12-16 05:54:10,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:10,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:54:10,525 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:54:10,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465170957] [2023-12-16 05:54:10,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:10,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:10,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:54:10,526 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 05:54:10,533 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 05:54:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:54:10,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-16 05:54:10,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:54:10,661 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 05:54:10,668 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 05:54:10,689 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 05:54:14,725 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#d~0#1.offset_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~#B~0#1.offset_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_~#d~0#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~#B~0#1.base_BEFORE_CALL_10| Int)) (= (select (select |c_#memory_int#2| |v_ULTIMATE.start_main_~#d~0#1.base_BEFORE_CALL_9|) |v_ULTIMATE.start_main_~#d~0#1.offset_BEFORE_CALL_9|) (select (select |c_#memory_int#4| |v_ULTIMATE.start_main_~#B~0#1.base_BEFORE_CALL_10|) |v_ULTIMATE.start_main_~#B~0#1.offset_BEFORE_CALL_10|))) is different from true [2023-12-16 05:54:14,762 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 05:54:14,764 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 05:54:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 2 not checked. [2023-12-16 05:54:14,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:54:18,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:54:18,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743262332] [2023-12-16 05:54:18,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:54:18,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465170957] [2023-12-16 05:54:18,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465170957] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:54:18,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 05:54:18,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-12-16 05:54:18,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903266436] [2023-12-16 05:54:18,880 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 05:54:18,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-16 05:54:18,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:54:18,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-16 05:54:18,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=70, Unknown=2, NotChecked=16, Total=110 [2023-12-16 05:54:18,881 INFO L87 Difference]: Start difference. First operand 126 states and 140 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-16 05:54:19,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:54:19,081 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2023-12-16 05:54:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-16 05:54:19,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2023-12-16 05:54:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:54:19,083 INFO L225 Difference]: With dead ends: 130 [2023-12-16 05:54:19,083 INFO L226 Difference]: Without dead ends: 98 [2023-12-16 05:54:19,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=45, Invalid=139, Unknown=2, NotChecked=24, Total=210 [2023-12-16 05:54:19,084 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 05:54:19,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 108 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 153 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2023-12-16 05:54:19,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-12-16 05:54:19,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2023-12-16 05:54:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 65 states have internal predecessors, (69), 19 states have call successors, (19), 13 states have call predecessors, (19), 14 states have return successors, (21), 18 states have call predecessors, (21), 17 states have call successors, (21) [2023-12-16 05:54:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2023-12-16 05:54:19,103 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 54 [2023-12-16 05:54:19,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:54:19,104 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2023-12-16 05:54:19,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-16 05:54:19,104 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2023-12-16 05:54:19,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-16 05:54:19,106 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:54:19,106 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:54:19,112 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 05:54:19,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:19,313 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:54:19,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:54:19,313 INFO L85 PathProgramCache]: Analyzing trace with hash 285838631, now seen corresponding path program 1 times [2023-12-16 05:54:19,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:54:19,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501210809] [2023-12-16 05:54:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:19,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:54:19,327 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:54:19,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327823503] [2023-12-16 05:54:19,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:19,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:19,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:54:19,329 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 05:54:19,337 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 05:54:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:54:19,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 111 conjunts are in the unsatisfiable core [2023-12-16 05:54:19,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:54:19,475 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 05:54:19,481 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 05:54:19,486 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 05:54:19,499 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 05:54:20,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-16 05:54:20,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-16 05:54:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-16 05:54:20,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:54:21,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:54:21,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501210809] [2023-12-16 05:54:21,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:54:21,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327823503] [2023-12-16 05:54:21,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327823503] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:54:21,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 05:54:21,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-12-16 05:54:21,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721503050] [2023-12-16 05:54:21,076 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 05:54:21,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-16 05:54:21,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:54:21,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-16 05:54:21,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2023-12-16 05:54:21,078 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand has 18 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-16 05:54:22,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:54:22,224 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2023-12-16 05:54:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-16 05:54:22,225 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 62 [2023-12-16 05:54:22,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:54:22,226 INFO L225 Difference]: With dead ends: 132 [2023-12-16 05:54:22,226 INFO L226 Difference]: Without dead ends: 130 [2023-12-16 05:54:22,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=205, Invalid=1355, Unknown=0, NotChecked=0, Total=1560 [2023-12-16 05:54:22,228 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 80 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 47 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-16 05:54:22,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 165 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 599 Invalid, 3 Unknown, 0 Unchecked, 0.6s Time] [2023-12-16 05:54:22,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-16 05:54:22,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2023-12-16 05:54:22,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 84 states have internal predecessors, (90), 24 states have call successors, (24), 17 states have call predecessors, (24), 20 states have return successors, (31), 24 states have call predecessors, (31), 21 states have call successors, (31) [2023-12-16 05:54:22,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2023-12-16 05:54:22,249 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 62 [2023-12-16 05:54:22,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:54:22,250 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2023-12-16 05:54:22,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-16 05:54:22,250 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2023-12-16 05:54:22,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-16 05:54:22,251 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:54:22,251 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:54:22,257 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 05:54:22,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:22,457 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:54:22,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:54:22,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1449137932, now seen corresponding path program 2 times [2023-12-16 05:54:22,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:54:22,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623858627] [2023-12-16 05:54:22,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:22,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:54:22,471 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:54:22,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275981661] [2023-12-16 05:54:22,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 05:54:22,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:22,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:54:22,473 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 05:54:22,496 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 05:54:22,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 05:54:22,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:54:22,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 139 conjunts are in the unsatisfiable core [2023-12-16 05:54:22,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:54:22,647 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 05:54:22,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 05:54:22,657 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 05:54:22,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-16 05:54:23,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-16 05:54:23,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-16 05:54:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2023-12-16 05:54:23,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:54:25,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:54:25,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623858627] [2023-12-16 05:54:25,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:54:25,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275981661] [2023-12-16 05:54:25,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275981661] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:54:25,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 05:54:25,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-16 05:54:25,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115869249] [2023-12-16 05:54:25,386 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 05:54:25,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-16 05:54:25,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:54:25,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-16 05:54:25,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2023-12-16 05:54:25,388 INFO L87 Difference]: Start difference. First operand 126 states and 145 transitions. Second operand has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2023-12-16 05:54:27,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:54:27,014 INFO L93 Difference]: Finished difference Result 160 states and 182 transitions. [2023-12-16 05:54:27,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-16 05:54:27,014 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) Word has length 86 [2023-12-16 05:54:27,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:54:27,015 INFO L225 Difference]: With dead ends: 160 [2023-12-16 05:54:27,015 INFO L226 Difference]: Without dead ends: 158 [2023-12-16 05:54:27,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=229, Invalid=1663, Unknown=0, NotChecked=0, Total=1892 [2023-12-16 05:54:27,017 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 70 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 34 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-16 05:54:27,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 246 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 868 Invalid, 1 Unknown, 0 Unchecked, 1.0s Time] [2023-12-16 05:54:27,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-12-16 05:54:27,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 128. [2023-12-16 05:54:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 85 states have internal predecessors, (91), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (33), 25 states have call predecessors, (33), 21 states have call successors, (33) [2023-12-16 05:54:27,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 148 transitions. [2023-12-16 05:54:27,038 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 148 transitions. Word has length 86 [2023-12-16 05:54:27,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:54:27,038 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 148 transitions. [2023-12-16 05:54:27,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2023-12-16 05:54:27,039 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 148 transitions. [2023-12-16 05:54:27,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-16 05:54:27,040 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:54:27,040 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:54:27,045 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 05:54:27,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-16 05:54:27,240 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:54:27,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:54:27,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1808661633, now seen corresponding path program 3 times [2023-12-16 05:54:27,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:54:27,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906932153] [2023-12-16 05:54:27,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:27,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:54:27,258 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:54:27,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560481130] [2023-12-16 05:54:27,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 05:54:27,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:27,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:54:27,260 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:54:27,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-16 05:54:27,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-16 05:54:27,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:54:27,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 201 conjunts are in the unsatisfiable core [2023-12-16 05:54:27,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:54:27,487 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 05:54:27,491 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 05:54:27,499 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 05:54:27,513 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 05:54:28,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-16 05:54:28,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-16 05:54:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 27 proven. 116 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-12-16 05:54:29,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:54:31,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:54:31,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906932153] [2023-12-16 05:54:31,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:54:31,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560481130] [2023-12-16 05:54:31,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560481130] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:54:31,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 05:54:31,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-12-16 05:54:31,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420341218] [2023-12-16 05:54:31,336 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 05:54:31,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-16 05:54:31,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:54:31,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-16 05:54:31,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2023-12-16 05:54:31,337 INFO L87 Difference]: Start difference. First operand 128 states and 148 transitions. Second operand has 22 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-16 05:54:33,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:54:33,272 INFO L93 Difference]: Finished difference Result 162 states and 185 transitions. [2023-12-16 05:54:33,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-16 05:54:33,273 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 110 [2023-12-16 05:54:33,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:54:33,274 INFO L225 Difference]: With dead ends: 162 [2023-12-16 05:54:33,274 INFO L226 Difference]: Without dead ends: 160 [2023-12-16 05:54:33,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=252, Invalid=1910, Unknown=0, NotChecked=0, Total=2162 [2023-12-16 05:54:33,275 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 75 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 39 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-16 05:54:33,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 257 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 960 Invalid, 2 Unknown, 0 Unchecked, 1.2s Time] [2023-12-16 05:54:33,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-12-16 05:54:33,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 130. [2023-12-16 05:54:33,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 83 states have (on average 1.108433734939759) internal successors, (92), 86 states have internal predecessors, (92), 24 states have call successors, (24), 17 states have call predecessors, (24), 22 states have return successors, (35), 26 states have call predecessors, (35), 21 states have call successors, (35) [2023-12-16 05:54:33,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 151 transitions. [2023-12-16 05:54:33,296 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 151 transitions. Word has length 110 [2023-12-16 05:54:33,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:54:33,297 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 151 transitions. [2023-12-16 05:54:33,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-16 05:54:33,297 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 151 transitions. [2023-12-16 05:54:33,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-12-16 05:54:33,298 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:54:33,299 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:54:33,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-16 05:54:33,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:33,502 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:54:33,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:54:33,502 INFO L85 PathProgramCache]: Analyzing trace with hash 927979470, now seen corresponding path program 4 times [2023-12-16 05:54:33,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:54:33,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115074645] [2023-12-16 05:54:33,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:33,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:54:33,521 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:54:33,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809496418] [2023-12-16 05:54:33,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-16 05:54:33,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:33,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:54:33,522 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:54:33,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-16 05:54:33,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-16 05:54:33,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:54:33,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 184 conjunts are in the unsatisfiable core [2023-12-16 05:54:33,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:54:34,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-16 05:54:34,160 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 05:54:38,444 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_40_to_50_0_~d.base_BEFORE_CALL_9 Int) (v_func_to_recursive_line_40_to_50_0_~B.base_BEFORE_CALL_9 Int) (v_func_to_recursive_line_40_to_50_0_~B.offset_BEFORE_CALL_9 Int) (v_func_to_recursive_line_40_to_50_0_~d.offset_BEFORE_CALL_9 Int) (v_func_to_recursive_line_40_to_50_0_~p.base_BEFORE_CALL_11 Int) (v_func_to_recursive_line_40_to_50_0_~p.offset_BEFORE_CALL_11 Int)) (= (* (select (select |c_#memory_int#4| v_func_to_recursive_line_40_to_50_0_~B.base_BEFORE_CALL_9) v_func_to_recursive_line_40_to_50_0_~B.offset_BEFORE_CALL_9) (select (select |c_#memory_int#5| v_func_to_recursive_line_40_to_50_0_~p.base_BEFORE_CALL_11) v_func_to_recursive_line_40_to_50_0_~p.offset_BEFORE_CALL_11)) (select (select |c_#memory_int#2| v_func_to_recursive_line_40_to_50_0_~d.base_BEFORE_CALL_9) v_func_to_recursive_line_40_to_50_0_~d.offset_BEFORE_CALL_9))) is different from true [2023-12-16 05:54:42,933 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 05:54:42,940 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 05:54:42,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-16 05:54:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 155 proven. 22 refuted. 0 times theorem prover too weak. 450 trivial. 1 not checked. [2023-12-16 05:54:46,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:54:47,582 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 76 treesize of output 72 [2023-12-16 05:54:47,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 05:54:47,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 67 [2023-12-16 05:54:47,609 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 86 treesize of output 78 [2023-12-16 05:54:48,292 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 76 treesize of output 72 [2023-12-16 05:54:48,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 05:54:48,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 67 [2023-12-16 05:54:48,305 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 86 treesize of output 78 [2023-12-16 05:54:48,819 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 76 treesize of output 72 [2023-12-16 05:54:48,829 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 05:54:48,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 67 [2023-12-16 05:54:48,835 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 86 treesize of output 78 [2023-12-16 05:54:49,170 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 05:54:49,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2023-12-16 05:54:49,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:54:49,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115074645] [2023-12-16 05:54:49,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:54:49,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809496418] [2023-12-16 05:54:49,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809496418] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:54:49,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 05:54:49,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-12-16 05:54:49,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341516372] [2023-12-16 05:54:49,287 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 05:54:49,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-16 05:54:49,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:54:49,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-16 05:54:49,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=332, Unknown=2, NotChecked=36, Total=420 [2023-12-16 05:54:49,288 INFO L87 Difference]: Start difference. First operand 130 states and 151 transitions. Second operand has 19 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-16 05:54:54,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:54:54,438 INFO L93 Difference]: Finished difference Result 153 states and 175 transitions. [2023-12-16 05:54:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-16 05:54:54,440 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 134 [2023-12-16 05:54:54,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:54:54,441 INFO L225 Difference]: With dead ends: 153 [2023-12-16 05:54:54,441 INFO L226 Difference]: Without dead ends: 151 [2023-12-16 05:54:54,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=160, Invalid=963, Unknown=3, NotChecked=64, Total=1190 [2023-12-16 05:54:54,442 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-16 05:54:54,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 148 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 480 Invalid, 1 Unknown, 72 Unchecked, 0.8s Time] [2023-12-16 05:54:54,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-12-16 05:54:54,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2023-12-16 05:54:54,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 95 states have (on average 1.105263157894737) internal successors, (105), 98 states have internal predecessors, (105), 26 states have call successors, (26), 20 states have call predecessors, (26), 25 states have return successors, (37), 28 states have call predecessors, (37), 23 states have call successors, (37) [2023-12-16 05:54:54,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 168 transitions. [2023-12-16 05:54:54,469 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 168 transitions. Word has length 134 [2023-12-16 05:54:54,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:54:54,470 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 168 transitions. [2023-12-16 05:54:54,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-16 05:54:54,470 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 168 transitions. [2023-12-16 05:54:54,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-16 05:54:54,471 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:54:54,471 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:54:54,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-16 05:54:54,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-16 05:54:54,671 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:54:54,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:54:54,672 INFO L85 PathProgramCache]: Analyzing trace with hash -559730474, now seen corresponding path program 1 times [2023-12-16 05:54:54,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:54:54,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063734875] [2023-12-16 05:54:54,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:54,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:54:54,688 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:54:54,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896332977] [2023-12-16 05:54:54,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:54,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:54,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:54:54,690 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:54:54,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-16 05:54:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:54:54,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-16 05:54:54,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:54:54,860 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 05:54:54,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-16 05:54:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-12-16 05:54:55,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:54:55,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-16 05:54:55,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:54:55,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063734875] [2023-12-16 05:54:55,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:54:55,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896332977] [2023-12-16 05:54:55,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896332977] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:54:55,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 05:54:55,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-12-16 05:54:55,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947699266] [2023-12-16 05:54:55,372 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 05:54:55,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-16 05:54:55,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:54:55,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-16 05:54:55,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-12-16 05:54:55,373 INFO L87 Difference]: Start difference. First operand 147 states and 168 transitions. Second operand has 10 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-16 05:54:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:54:55,602 INFO L93 Difference]: Finished difference Result 158 states and 182 transitions. [2023-12-16 05:54:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-16 05:54:55,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 72 [2023-12-16 05:54:55,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:54:55,603 INFO L225 Difference]: With dead ends: 158 [2023-12-16 05:54:55,603 INFO L226 Difference]: Without dead ends: 148 [2023-12-16 05:54:55,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-12-16 05:54:55,604 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 05:54:55,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 107 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 05:54:55,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-12-16 05:54:55,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2023-12-16 05:54:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 95 states have (on average 1.105263157894737) internal successors, (105), 98 states have internal predecessors, (105), 27 states have call successors, (27), 20 states have call predecessors, (27), 25 states have return successors, (39), 29 states have call predecessors, (39), 24 states have call successors, (39) [2023-12-16 05:54:55,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 171 transitions. [2023-12-16 05:54:55,652 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 171 transitions. Word has length 72 [2023-12-16 05:54:55,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:54:55,653 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 171 transitions. [2023-12-16 05:54:55,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-16 05:54:55,653 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 171 transitions. [2023-12-16 05:54:55,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-16 05:54:55,654 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:54:55,654 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:54:55,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-16 05:54:55,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-16 05:54:55,855 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:54:55,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:54:55,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1167658909, now seen corresponding path program 2 times [2023-12-16 05:54:55,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:54:55,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004277145] [2023-12-16 05:54:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:55,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:54:55,875 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:54:55,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211035130] [2023-12-16 05:54:55,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 05:54:55,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:55,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:54:55,876 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:54:55,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-16 05:54:56,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 05:54:56,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:54:56,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-16 05:54:56,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:54:56,071 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 05:54:56,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-16 05:54:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-12-16 05:54:56,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:54:56,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:54:56,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004277145] [2023-12-16 05:54:56,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:54:56,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211035130] [2023-12-16 05:54:56,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211035130] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:54:56,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 05:54:56,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-16 05:54:56,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974372717] [2023-12-16 05:54:56,781 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 05:54:56,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-16 05:54:56,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:54:56,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-16 05:54:56,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-12-16 05:54:56,782 INFO L87 Difference]: Start difference. First operand 148 states and 171 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 11 states have internal predecessors, (30), 8 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-16 05:54:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:54:57,108 INFO L93 Difference]: Finished difference Result 159 states and 185 transitions. [2023-12-16 05:54:57,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-16 05:54:57,109 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 11 states have internal predecessors, (30), 8 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 96 [2023-12-16 05:54:57,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:54:57,110 INFO L225 Difference]: With dead ends: 159 [2023-12-16 05:54:57,110 INFO L226 Difference]: Without dead ends: 149 [2023-12-16 05:54:57,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-12-16 05:54:57,112 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-16 05:54:57,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 135 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-16 05:54:57,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-12-16 05:54:57,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2023-12-16 05:54:57,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 95 states have (on average 1.105263157894737) internal successors, (105), 98 states have internal predecessors, (105), 27 states have call successors, (27), 20 states have call predecessors, (27), 25 states have return successors, (39), 29 states have call predecessors, (39), 24 states have call successors, (39) [2023-12-16 05:54:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 171 transitions. [2023-12-16 05:54:57,143 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 171 transitions. Word has length 96 [2023-12-16 05:54:57,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:54:57,144 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 171 transitions. [2023-12-16 05:54:57,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 11 states have internal predecessors, (30), 8 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-16 05:54:57,144 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 171 transitions. [2023-12-16 05:54:57,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-12-16 05:54:57,145 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:54:57,145 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:54:57,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-16 05:54:57,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-16 05:54:57,351 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:54:57,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:54:57,352 INFO L85 PathProgramCache]: Analyzing trace with hash 374323120, now seen corresponding path program 3 times [2023-12-16 05:54:57,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:54:57,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995559709] [2023-12-16 05:54:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:57,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:54:57,366 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:54:57,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420235865] [2023-12-16 05:54:57,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-16 05:54:57,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:57,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:54:57,368 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:54:57,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-16 05:54:57,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-16 05:54:57,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:54:57,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-16 05:54:57,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:54:57,632 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 05:54:57,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-16 05:54:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 28 proven. 38 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2023-12-16 05:54:58,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2023-12-16 05:54:58,315 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-16 05:54:58,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-16 05:54:58,345 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 05:54:58,352 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 05:54:58,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-16 05:54:58,516 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 121 with TraceHistMax 15,while TraceCheckSpWp was constructing backward predicates,while TransFormulaUtils was doing sequential composition of 11 TransFormulas,while SimplifyDDA2 was simplifying a ∧-13-1 term,while SimplifyDDA2 was simplifying 13 xjuncts wrt. a ATOM-1 context. [2023-12-16 05:54:58,520 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:54:58,522 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-16 05:54:58,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 05:54:58 BoogieIcfgContainer [2023-12-16 05:54:58,524 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-16 05:54:58,524 INFO L158 Benchmark]: Toolchain (without parser) took 66019.17ms. Allocated memory was 195.0MB in the beginning and 383.8MB in the end (delta: 188.7MB). Free memory was 138.9MB in the beginning and 228.1MB in the end (delta: -89.1MB). Peak memory consumption was 101.5MB. Max. memory is 8.0GB. [2023-12-16 05:54:58,525 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 195.0MB. Free memory is still 146.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 05:54:58,525 INFO L158 Benchmark]: CACSL2BoogieTranslator took 246.58ms. Allocated memory is still 195.0MB. Free memory was 138.9MB in the beginning and 127.1MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-16 05:54:58,525 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.33ms. Allocated memory is still 195.0MB. Free memory was 126.8MB in the beginning and 125.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 05:54:58,525 INFO L158 Benchmark]: Boogie Preprocessor took 44.40ms. Allocated memory is still 195.0MB. Free memory was 125.3MB in the beginning and 122.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 05:54:58,526 INFO L158 Benchmark]: RCFGBuilder took 503.69ms. Allocated memory was 195.0MB in the beginning and 319.8MB in the end (delta: 124.8MB). Free memory was 122.6MB in the beginning and 281.9MB in the end (delta: -159.3MB). Peak memory consumption was 22.5MB. Max. memory is 8.0GB. [2023-12-16 05:54:58,526 INFO L158 Benchmark]: TraceAbstraction took 65175.68ms. Allocated memory was 319.8MB in the beginning and 383.8MB in the end (delta: 64.0MB). Free memory was 280.8MB in the beginning and 228.1MB in the end (delta: 52.8MB). Peak memory consumption was 116.7MB. Max. memory is 8.0GB. [2023-12-16 05:54:58,527 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 195.0MB. Free memory is still 146.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 246.58ms. Allocated memory is still 195.0MB. Free memory was 138.9MB in the beginning and 127.1MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 42.33ms. Allocated memory is still 195.0MB. Free memory was 126.8MB in the beginning and 125.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 44.40ms. Allocated memory is still 195.0MB. Free memory was 125.3MB in the beginning and 122.6MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 503.69ms. Allocated memory was 195.0MB in the beginning and 319.8MB in the end (delta: 124.8MB). Free memory was 122.6MB in the beginning and 281.9MB in the end (delta: -159.3MB). Peak memory consumption was 22.5MB. Max. memory is 8.0GB. * TraceAbstraction took 65175.68ms. Allocated memory was 319.8MB in the beginning and 383.8MB in the end (delta: 64.0MB). Free memory was 280.8MB in the beginning and 228.1MB in the end (delta: 52.8MB). Peak memory consumption was 116.7MB. 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 NwaCegarLoop was analyzing trace of length 121 with TraceHistMax 15,while TraceCheckSpWp was constructing backward predicates,while TransFormulaUtils was doing sequential composition of 11 TransFormulas,while SimplifyDDA2 was simplifying a ∧-13-1 term,while SimplifyDDA2 was simplifying 13 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 65.1s, OverallIterations: 15, TraceHistogramMax: 17, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 14.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 8 mSolverCounterUnknown, 733 SdHoareTripleChecker+Valid, 6.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 705 mSDsluCounter, 2292 SdHoareTripleChecker+Invalid, 5.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 131 IncrementalHoareTripleChecker+Unchecked, 1931 mSDsCounter, 423 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5610 IncrementalHoareTripleChecker+Invalid, 6172 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 423 mSolverCounterUnsat, 361 mSDtfsCounter, 5610 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1145 GetRequests, 755 SyntacticMatches, 26 SemanticMatches, 364 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2191 ImplicationChecksByTransitivity, 38.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=148occurred in iteration=13, InterpolantAutomatonStates: 218, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 93 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 43.9s InterpolantComputationTime, 823 NumberOfCodeBlocks, 794 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 828 ConstructedInterpolants, 348 QuantifiedInterpolants, 13141 SizeOfPredicates, 299 NumberOfNonLiveVariables, 5021 ConjunctsInSsa, 1056 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 1603/2036 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