/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 true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_egcd-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 23:03:19,159 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 23:03:19,219 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 23:03:19,222 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 23:03:19,222 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 23:03:19,234 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 23:03:19,235 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 23:03:19,235 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 23:03:19,235 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 23:03:19,236 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 23:03:19,236 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 23:03:19,236 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 23:03:19,236 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 23:03:19,237 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 23:03:19,237 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 23:03:19,237 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 23:03:19,237 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 23:03:19,237 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 23:03:19,238 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 23:03:19,238 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 23:03:19,238 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 23:03:19,239 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 23:03:19,239 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 23:03:19,239 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 23:03:19,239 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 23:03:19,239 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 23:03:19,240 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 23:03:19,240 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 23:03:19,240 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 23:03:19,240 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 23:03:19,240 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 23:03:19,243 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 23:03:19,243 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 23:03:19,243 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 23:03:19,244 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 23:03:19,246 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 23:03:19,247 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 23:03:19,247 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 23:03:19,247 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 23:03:19,247 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 23:03:19,247 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 23:03:19,247 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 23:03:19,247 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 23:03:19,248 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 23:03:19,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 23:03:19,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 23:03:19,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 23:03:19,456 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 23:03:19,459 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 23:03:19,460 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_egcd-ll.c [2023-12-15 23:03:20,407 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 23:03:20,546 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 23:03:20,546 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_egcd-ll.c [2023-12-15 23:03:20,559 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/834cb45f2/449651aa754445c79df963e5df322a76/FLAG09554a418 [2023-12-15 23:03:20,574 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/834cb45f2/449651aa754445c79df963e5df322a76 [2023-12-15 23:03:20,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 23:03:20,579 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 23:03:20,580 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 23:03:20,580 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 23:03:20,583 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 23:03:20,584 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:03:20" (1/1) ... [2023-12-15 23:03:20,584 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58ffa4d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:20, skipping insertion in model container [2023-12-15 23:03:20,585 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:03:20" (1/1) ... [2023-12-15 23:03:20,607 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 23:03:20,695 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_egcd-ll.c[1019,1032] [2023-12-15 23:03:20,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 23:03:20,715 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 23:03:20,723 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_egcd-ll.c[1019,1032] [2023-12-15 23:03:20,733 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 23:03:20,742 INFO L206 MainTranslator]: Completed translation [2023-12-15 23:03:20,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:20 WrapperNode [2023-12-15 23:03:20,743 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 23:03:20,743 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 23:03:20,743 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 23:03:20,743 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 23:03:20,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:20" (1/1) ... [2023-12-15 23:03:20,753 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:20" (1/1) ... [2023-12-15 23:03:20,767 INFO L138 Inliner]: procedures = 16, calls = 106, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 112 [2023-12-15 23:03:20,767 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 23:03:20,768 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 23:03:20,768 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 23:03:20,768 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 23:03:20,775 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:20" (1/1) ... [2023-12-15 23:03:20,775 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:20" (1/1) ... [2023-12-15 23:03:20,777 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:20" (1/1) ... [2023-12-15 23:03:20,789 INFO L175 MemorySlicer]: Split 66 memory accesses to 9 slices as follows [2, 7, 7, 8, 8, 8, 10, 8, 8]. 15 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0, 0]. The 14 writes are split as follows [0, 1, 1, 2, 2, 2, 2, 2, 2]. [2023-12-15 23:03:20,789 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:20" (1/1) ... [2023-12-15 23:03:20,789 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:20" (1/1) ... [2023-12-15 23:03:20,805 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:20" (1/1) ... [2023-12-15 23:03:20,806 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:20" (1/1) ... [2023-12-15 23:03:20,808 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:20" (1/1) ... [2023-12-15 23:03:20,809 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:20" (1/1) ... [2023-12-15 23:03:20,811 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 23:03:20,811 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 23:03:20,811 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 23:03:20,812 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 23:03:20,812 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:20" (1/1) ... [2023-12-15 23:03:20,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 23:03:20,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:03:20,842 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) [2023-12-15 23:03:20,857 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 [2023-12-15 23:03:20,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 23:03:20,873 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_48_0 [2023-12-15 23:03:20,874 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_48_0 [2023-12-15 23:03:20,874 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-15 23:03:20,874 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-15 23:03:20,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 23:03:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-15 23:03:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-15 23:03:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-15 23:03:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-15 23:03:20,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-12-15 23:03:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-12-15 23:03:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-12-15 23:03:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-12-15 23:03:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-15 23:03:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-15 23:03:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-15 23:03:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-15 23:03:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-15 23:03:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-15 23:03:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-12-15 23:03:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-12-15 23:03:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-12-15 23:03:20,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2023-12-15 23:03:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 23:03:20,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 23:03:20,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-15 23:03:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-15 23:03:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-15 23:03:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-15 23:03:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-15 23:03:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-12-15 23:03:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-12-15 23:03:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-12-15 23:03:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2023-12-15 23:03:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-15 23:03:20,880 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-15 23:03:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-15 23:03:20,996 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 23:03:20,999 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 23:03:21,239 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 23:03:21,258 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 23:03:21,259 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-15 23:03:21,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:03:21 BoogieIcfgContainer [2023-12-15 23:03:21,259 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 23:03:21,260 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 23:03:21,260 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 23:03:21,262 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 23:03:21,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:03:20" (1/3) ... [2023-12-15 23:03:21,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@606f3f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:03:21, skipping insertion in model container [2023-12-15 23:03:21,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:03:20" (2/3) ... [2023-12-15 23:03:21,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@606f3f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:03:21, skipping insertion in model container [2023-12-15 23:03:21,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:03:21" (3/3) ... [2023-12-15 23:03:21,265 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd-ll.c [2023-12-15 23:03:21,275 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 23:03:21,275 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 23:03:21,301 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 23:03:21,305 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;@55e8457, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 23:03:21,305 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 23:03:21,308 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 23 states have (on average 1.2608695652173914) 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) [2023-12-15 23:03:21,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-15 23:03:21,312 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:03:21,313 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:03:21,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:03:21,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:03:21,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1393043311, now seen corresponding path program 1 times [2023-12-15 23:03:21,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:03:21,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764463163] [2023-12-15 23:03:21,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:03:21,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:03:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:21,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:03:21,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764463163] [2023-12-15 23:03:21,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-15 23:03:21,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285084240] [2023-12-15 23:03:21,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:03:21,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:03:21,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:03:21,484 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) [2023-12-15 23:03:21,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 23:03:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:21,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-15 23:03:21,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:03:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-15 23:03:21,649 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 23:03:21,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285084240] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:03:21,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:03:21,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 23:03:21,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677650874] [2023-12-15 23:03:21,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:03:21,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 23:03:21,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:03:21,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 23:03:21,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 23:03:21,685 INFO L87 Difference]: Start difference. First operand has 39 states, 23 states have (on average 1.2608695652173914) 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 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 23:03:21,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:03:21,717 INFO L93 Difference]: Finished difference Result 76 states and 110 transitions. [2023-12-15 23:03:21,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 23:03:21,718 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-12-15 23:03:21,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:03:21,724 INFO L225 Difference]: With dead ends: 76 [2023-12-15 23:03:21,724 INFO L226 Difference]: Without dead ends: 37 [2023-12-15 23:03:21,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 23:03:21,731 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 23:03:21,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 23:03:21,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-15 23:03:21,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-12-15 23:03:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-15 23:03:21,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2023-12-15 23:03:21,765 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 20 [2023-12-15 23:03:21,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:03:21,765 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2023-12-15 23:03:21,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-15 23:03:21,766 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2023-12-15 23:03:21,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-15 23:03:21,767 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:03:21,767 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:03:21,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-15 23:03:21,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-15 23:03:21,972 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:03:21,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:03:21,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2014640661, now seen corresponding path program 1 times [2023-12-15 23:03:21,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:03:21,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028051286] [2023-12-15 23:03:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:03:21,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:03:22,025 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 23:03:22,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009086065] [2023-12-15 23:03:22,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:03:22,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:03:22,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:03:22,027 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) [2023-12-15 23:03:22,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 23:03:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:22,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-15 23:03:22,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:03:22,281 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 [2023-12-15 23:03:22,286 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 [2023-12-15 23:03:22,291 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 [2023-12-15 23:03:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 23:03:22,439 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 23:03:22,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:03:22,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028051286] [2023-12-15 23:03:22,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 23:03:22,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009086065] [2023-12-15 23:03:22,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009086065] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:03:22,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:03:22,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-15 23:03:22,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833181480] [2023-12-15 23:03:22,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:03:22,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-15 23:03:22,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:03:22,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-15 23:03:22,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-12-15 23:03:22,447 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-15 23:03:22,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:03:22,786 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2023-12-15 23:03:22,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-15 23:03:22,786 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-12-15 23:03:22,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:03:22,789 INFO L225 Difference]: With dead ends: 66 [2023-12-15 23:03:22,789 INFO L226 Difference]: Without dead ends: 64 [2023-12-15 23:03:22,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-12-15 23:03:22,791 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 23:03:22,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 198 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 23:03:22,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-15 23:03:22,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2023-12-15 23:03:22,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 37 states have internal predecessors, (39), 15 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2023-12-15 23:03:22,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2023-12-15 23:03:22,815 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 20 [2023-12-15 23:03:22,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:03:22,816 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2023-12-15 23:03:22,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-15 23:03:22,816 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2023-12-15 23:03:22,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-15 23:03:22,817 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:03:22,817 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:03:22,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 23:03:23,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-15 23:03:23,021 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:03:23,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:03:23,022 INFO L85 PathProgramCache]: Analyzing trace with hash -989224114, now seen corresponding path program 1 times [2023-12-15 23:03:23,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:03:23,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113845857] [2023-12-15 23:03:23,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:03:23,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:03:23,061 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 23:03:23,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009545022] [2023-12-15 23:03:23,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:03:23,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:03:23,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:03:23,065 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) [2023-12-15 23:03:23,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 23:03:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:23,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 83 conjunts are in the unsatisfiable core [2023-12-15 23:03:23,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:03:23,205 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 [2023-12-15 23:03:23,208 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 [2023-12-15 23:03:23,226 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 [2023-12-15 23:03:23,254 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 [2023-12-15 23:03:23,257 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 [2023-12-15 23:03:23,265 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 [2023-12-15 23:03:23,469 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 [2023-12-15 23:03:23,472 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 [2023-12-15 23:03:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 23:03:23,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:03:23,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:03:23,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113845857] [2023-12-15 23:03:23,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 23:03:23,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009545022] [2023-12-15 23:03:23,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009545022] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:03:23,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-15 23:03:23,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-15 23:03:23,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10580497] [2023-12-15 23:03:23,614 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-15 23:03:23,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-15 23:03:23,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:03:23,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-15 23:03:23,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-12-15 23:03:23,619 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-15 23:03:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:03:24,046 INFO L93 Difference]: Finished difference Result 117 states and 148 transitions. [2023-12-15 23:03:24,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 23:03:24,047 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-12-15 23:03:24,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:03:24,049 INFO L225 Difference]: With dead ends: 117 [2023-12-15 23:03:24,049 INFO L226 Difference]: Without dead ends: 115 [2023-12-15 23:03:24,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-12-15 23:03:24,051 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 60 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 23:03:24,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 191 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 23:03:24,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-15 23:03:24,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2023-12-15 23:03:24,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 64 states have (on average 1.15625) internal successors, (74), 68 states have internal predecessors, (74), 26 states have call successors, (26), 10 states have call predecessors, (26), 12 states have return successors, (31), 25 states have call predecessors, (31), 24 states have call successors, (31) [2023-12-15 23:03:24,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 131 transitions. [2023-12-15 23:03:24,077 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 131 transitions. Word has length 26 [2023-12-15 23:03:24,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:03:24,077 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 131 transitions. [2023-12-15 23:03:24,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-15 23:03:24,078 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 131 transitions. [2023-12-15 23:03:24,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-15 23:03:24,078 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:03:24,078 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:03:24,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-15 23:03:24,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:03:24,283 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:03:24,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:03:24,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1390773957, now seen corresponding path program 1 times [2023-12-15 23:03:24,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:03:24,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233427207] [2023-12-15 23:03:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:03:24,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:03:24,302 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 23:03:24,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713826077] [2023-12-15 23:03:24,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:03:24,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:03:24,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:03:24,306 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) [2023-12-15 23:03:24,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 23:03:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:24,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 79 conjunts are in the unsatisfiable core [2023-12-15 23:03:24,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:03:24,433 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 [2023-12-15 23:03:24,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-15 23:03:24,469 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 [2023-12-15 23:03:24,473 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 [2023-12-15 23:03:24,774 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 [2023-12-15 23:03:24,780 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 [2023-12-15 23:03:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-15 23:03:24,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:03:24,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:03:24,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233427207] [2023-12-15 23:03:24,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 23:03:24,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713826077] [2023-12-15 23:03:24,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713826077] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:03:24,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-15 23:03:24,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-15 23:03:24,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933460951] [2023-12-15 23:03:24,882 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-15 23:03:24,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-15 23:03:24,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:03:24,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-15 23:03:24,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-12-15 23:03:24,885 INFO L87 Difference]: Start difference. First operand 103 states and 131 transitions. Second operand has 12 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-15 23:03:25,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:03:25,292 INFO L93 Difference]: Finished difference Result 145 states and 177 transitions. [2023-12-15 23:03:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 23:03:25,292 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-12-15 23:03:25,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:03:25,295 INFO L225 Difference]: With dead ends: 145 [2023-12-15 23:03:25,295 INFO L226 Difference]: Without dead ends: 143 [2023-12-15 23:03:25,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-12-15 23:03:25,297 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 62 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 23:03:25,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 148 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 23:03:25,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-12-15 23:03:25,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2023-12-15 23:03:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 91 states have internal predecessors, (99), 34 states have call successors, (34), 15 states have call predecessors, (34), 17 states have return successors, (37), 33 states have call predecessors, (37), 30 states have call successors, (37) [2023-12-15 23:03:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 170 transitions. [2023-12-15 23:03:25,321 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 170 transitions. Word has length 32 [2023-12-15 23:03:25,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:03:25,321 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 170 transitions. [2023-12-15 23:03:25,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-15 23:03:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 170 transitions. [2023-12-15 23:03:25,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-15 23:03:25,322 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:03:25,322 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:03:25,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-15 23:03:25,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:03:25,532 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:03:25,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:03:25,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2034600058, now seen corresponding path program 1 times [2023-12-15 23:03:25,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:03:25,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122610372] [2023-12-15 23:03:25,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:03:25,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:03:25,548 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 23:03:25,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018922664] [2023-12-15 23:03:25,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:03:25,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:03:25,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:03:25,553 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) [2023-12-15 23:03:25,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 23:03:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:25,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-15 23:03:25,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:03:25,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-15 23:03:25,695 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 [2023-12-15 23:03:25,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-15 23:03:25,699 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 [2023-12-15 23:03:25,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-15 23:03:25,833 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 [2023-12-15 23:03:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-15 23:03:25,850 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 23:03:25,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:03:25,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122610372] [2023-12-15 23:03:25,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 23:03:25,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018922664] [2023-12-15 23:03:25,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018922664] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 23:03:25,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 23:03:25,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-15 23:03:25,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501408868] [2023-12-15 23:03:25,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 23:03:25,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-15 23:03:25,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:03:25,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-15 23:03:25,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-15 23:03:25,852 INFO L87 Difference]: Start difference. First operand 139 states and 170 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-15 23:03:26,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:03:26,140 INFO L93 Difference]: Finished difference Result 147 states and 177 transitions. [2023-12-15 23:03:26,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-15 23:03:26,140 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2023-12-15 23:03:26,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:03:26,141 INFO L225 Difference]: With dead ends: 147 [2023-12-15 23:03:26,141 INFO L226 Difference]: Without dead ends: 145 [2023-12-15 23:03:26,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-12-15 23:03:26,142 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 23:03:26,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 96 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 23:03:26,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-12-15 23:03:26,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-12-15 23:03:26,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 91 states have (on average 1.1318681318681318) internal successors, (103), 95 states have internal predecessors, (103), 34 states have call successors, (34), 16 states have call predecessors, (34), 19 states have return successors, (38), 33 states have call predecessors, (38), 30 states have call successors, (38) [2023-12-15 23:03:26,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 175 transitions. [2023-12-15 23:03:26,156 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 175 transitions. Word has length 42 [2023-12-15 23:03:26,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:03:26,156 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 175 transitions. [2023-12-15 23:03:26,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-15 23:03:26,156 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 175 transitions. [2023-12-15 23:03:26,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-15 23:03:26,157 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:03:26,157 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:03:26,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-15 23:03:26,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:03:26,358 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:03:26,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:03:26,358 INFO L85 PathProgramCache]: Analyzing trace with hash 403352146, now seen corresponding path program 1 times [2023-12-15 23:03:26,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:03:26,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281419042] [2023-12-15 23:03:26,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:03:26,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:03:26,375 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 23:03:26,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318426576] [2023-12-15 23:03:26,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:03:26,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:03:26,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:03:26,377 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) [2023-12-15 23:03:26,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 23:03:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:26,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 99 conjunts are in the unsatisfiable core [2023-12-15 23:03:26,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:03:26,541 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 [2023-12-15 23:03:26,544 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 [2023-12-15 23:03:26,550 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 [2023-12-15 23:03:26,848 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 [2023-12-15 23:03:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-15 23:03:26,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:03:27,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:03:27,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281419042] [2023-12-15 23:03:27,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 23:03:27,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318426576] [2023-12-15 23:03:27,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318426576] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 23:03:27,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-15 23:03:27,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-15 23:03:27,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023747670] [2023-12-15 23:03:27,080 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-15 23:03:27,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-15 23:03:27,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:03:27,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-15 23:03:27,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-12-15 23:03:27,081 INFO L87 Difference]: Start difference. First operand 145 states and 175 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 23:03:27,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:03:27,442 INFO L93 Difference]: Finished difference Result 155 states and 184 transitions. [2023-12-15 23:03:27,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 23:03:27,442 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2023-12-15 23:03:27,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:03:27,443 INFO L225 Difference]: With dead ends: 155 [2023-12-15 23:03:27,443 INFO L226 Difference]: Without dead ends: 153 [2023-12-15 23:03:27,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-12-15 23:03:27,445 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 47 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 23:03:27,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 212 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 23:03:27,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-12-15 23:03:27,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2023-12-15 23:03:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 94 states have (on average 1.127659574468085) internal successors, (106), 98 states have internal predecessors, (106), 34 states have call successors, (34), 17 states have call predecessors, (34), 20 states have return successors, (38), 33 states have call predecessors, (38), 30 states have call successors, (38) [2023-12-15 23:03:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2023-12-15 23:03:27,459 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 43 [2023-12-15 23:03:27,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:03:27,459 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2023-12-15 23:03:27,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-15 23:03:27,459 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2023-12-15 23:03:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-15 23:03:27,460 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:03:27,460 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:03:27,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 23:03:27,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:03:27,664 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:03:27,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:03:27,665 INFO L85 PathProgramCache]: Analyzing trace with hash -806435587, now seen corresponding path program 1 times [2023-12-15 23:03:27,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:03:27,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660737978] [2023-12-15 23:03:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:03:27,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:03:27,690 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 23:03:27,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1806134025] [2023-12-15 23:03:27,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:03:27,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:03:27,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:03:27,693 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) [2023-12-15 23:03:27,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 23:03:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:03:27,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 132 conjunts are in the unsatisfiable core [2023-12-15 23:03:27,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:03:27,828 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 [2023-12-15 23:03:27,833 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 [2023-12-15 23:03:27,881 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 [2023-12-15 23:03:27,886 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 [2023-12-15 23:03:27,890 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 [2023-12-15 23:03:27,898 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 [2023-12-15 23:03:27,926 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 [2023-12-15 23:03:27,929 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 [2023-12-15 23:03:32,296 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_func_to_recursive_line_33_to_48_0_#in~y.offset_BEFORE_CALL_3| Int) (|v_func_to_recursive_line_33_to_48_0_#in~a.offset_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_33_to_48_0_#in~r.offset_BEFORE_CALL_3| Int) (|v_func_to_recursive_line_33_to_48_0_#in~p.base_BEFORE_CALL_3| Int) (|v_func_to_recursive_line_33_to_48_0_#in~y.base_BEFORE_CALL_3| Int) (|v_func_to_recursive_line_33_to_48_0_#in~x.offset_BEFORE_CALL_3| Int) (|v_func_to_recursive_line_33_to_48_0_#in~p.offset_BEFORE_CALL_3| Int) (|v_func_to_recursive_line_33_to_48_0_#in~x.base_BEFORE_CALL_3| Int) (|v_func_to_recursive_line_33_to_48_0_#in~a.base_BEFORE_CALL_6| Int) (|v_func_to_recursive_line_33_to_48_0_#in~r.base_BEFORE_CALL_3| Int)) (= (+ (* (select (select |c_#memory_int#8| |v_func_to_recursive_line_33_to_48_0_#in~p.base_BEFORE_CALL_3|) |v_func_to_recursive_line_33_to_48_0_#in~p.offset_BEFORE_CALL_3|) (select (select |c_#memory_int#2| |v_func_to_recursive_line_33_to_48_0_#in~x.base_BEFORE_CALL_3|) |v_func_to_recursive_line_33_to_48_0_#in~x.offset_BEFORE_CALL_3|)) (* (select (select |c_#memory_int#5| |v_func_to_recursive_line_33_to_48_0_#in~r.base_BEFORE_CALL_3|) |v_func_to_recursive_line_33_to_48_0_#in~r.offset_BEFORE_CALL_3|) (select (select |c_#memory_int#1| |v_func_to_recursive_line_33_to_48_0_#in~y.base_BEFORE_CALL_3|) |v_func_to_recursive_line_33_to_48_0_#in~y.offset_BEFORE_CALL_3|))) (select (select |c_#memory_int#4| |v_func_to_recursive_line_33_to_48_0_#in~a.base_BEFORE_CALL_6|) |v_func_to_recursive_line_33_to_48_0_#in~a.offset_BEFORE_CALL_6|))) is different from true [2023-12-15 23:03:32,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2023-12-15 23:03:36,905 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 23:03:36,905 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 52 treesize of output 40 [2023-12-15 23:03:36,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 23:03:36,922 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 53 treesize of output 41 [2023-12-15 23:03:36,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 23:03:36,932 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 39 treesize of output 31 [2023-12-15 23:03:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 9 not checked. [2023-12-15 23:03:36,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:03:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-15 23:03:43,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:03:43,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660737978] [2023-12-15 23:03:43,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 23:03:43,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806134025] [2023-12-15 23:03:43,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806134025] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 23:03:43,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 23:03:43,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 36 [2023-12-15 23:03:43,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497921231] [2023-12-15 23:03:43,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 23:03:43,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-15 23:03:43,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:03:43,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-15 23:03:43,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1047, Unknown=2, NotChecked=66, Total=1260 [2023-12-15 23:03:43,292 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand has 36 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 13 states have call successors, (16), 6 states have call predecessors, (16), 8 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2023-12-15 23:03:47,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-15 23:04:19,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 23:04:19,632 INFO L93 Difference]: Finished difference Result 196 states and 236 transitions. [2023-12-15 23:04:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-15 23:04:19,632 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 13 states have call successors, (16), 6 states have call predecessors, (16), 8 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 48 [2023-12-15 23:04:19,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 23:04:19,634 INFO L225 Difference]: With dead ends: 196 [2023-12-15 23:04:19,634 INFO L226 Difference]: Without dead ends: 194 [2023-12-15 23:04:19,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 44.4s TimeCoverageRelationStatistics Valid=450, Invalid=3327, Unknown=9, NotChecked=120, Total=3906 [2023-12-15 23:04:19,636 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 79 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-12-15 23:04:19,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 101 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 835 Invalid, 3 Unknown, 96 Unchecked, 6.1s Time] [2023-12-15 23:04:19,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-12-15 23:04:19,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 183. [2023-12-15 23:04:19,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 116 states have (on average 1.1206896551724137) internal successors, (130), 120 states have internal predecessors, (130), 38 states have call successors, (38), 22 states have call predecessors, (38), 28 states have return successors, (49), 40 states have call predecessors, (49), 34 states have call successors, (49) [2023-12-15 23:04:19,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 217 transitions. [2023-12-15 23:04:19,692 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 217 transitions. Word has length 48 [2023-12-15 23:04:19,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 23:04:19,692 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 217 transitions. [2023-12-15 23:04:19,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 13 states have call successors, (16), 6 states have call predecessors, (16), 8 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2023-12-15 23:04:19,692 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 217 transitions. [2023-12-15 23:04:19,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-15 23:04:19,696 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 23:04:19,696 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2023-12-15 23:04:19,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 23:04:19,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:04:19,899 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 23:04:19,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 23:04:19,899 INFO L85 PathProgramCache]: Analyzing trace with hash -115614067, now seen corresponding path program 1 times [2023-12-15 23:04:19,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 23:04:19,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207605762] [2023-12-15 23:04:19,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:04:19,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 23:04:19,922 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 23:04:19,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504968637] [2023-12-15 23:04:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 23:04:19,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 23:04:19,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 23:04:19,924 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) [2023-12-15 23:04:19,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 23:04:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 23:04:20,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 201 conjunts are in the unsatisfiable core [2023-12-15 23:04:20,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 23:04:20,105 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 [2023-12-15 23:04:20,117 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 [2023-12-15 23:04:20,208 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 [2023-12-15 23:04:20,216 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 [2023-12-15 23:04:20,234 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 [2023-12-15 23:04:20,242 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 [2023-12-15 23:04:20,254 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 [2023-12-15 23:04:20,271 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 [2023-12-15 23:04:21,565 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 [2023-12-15 23:04:21,592 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 13 [2023-12-15 23:04:21,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2023-12-15 23:04:21,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-12-15 23:04:22,041 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 [2023-12-15 23:04:22,062 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 [2023-12-15 23:04:22,071 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 [2023-12-15 23:04:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 23:04:22,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 23:04:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-15 23:04:23,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 23:04:23,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207605762] [2023-12-15 23:04:23,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 23:04:23,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504968637] [2023-12-15 23:04:23,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504968637] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 23:04:23,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-15 23:04:23,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2023-12-15 23:04:23,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394364190] [2023-12-15 23:04:23,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-15 23:04:23,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-15 23:04:23,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 23:04:23,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-15 23:04:23,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2023-12-15 23:04:23,034 INFO L87 Difference]: Start difference. First operand 183 states and 217 transitions. Second operand has 23 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 17 states have internal predecessors, (46), 10 states have call successors, (18), 9 states have call predecessors, (18), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-12-15 23:04:32,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] Received shutdown request... [2023-12-15 23:04:36,470 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 23:04:36,503 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 23:04:36,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-15 23:04:36,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-15 23:04:36,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2023-12-15 23:04:36,521 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 123 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 50 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2023-12-15 23:04:36,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 361 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 669 Invalid, 2 Unknown, 0 Unchecked, 10.7s Time] [2023-12-15 23:04:36,522 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 23:04:36,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-15 23:04:36,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-15 23:04:36,727 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (183states) and FLOYD_HOARE automaton (currently 30 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 42 known predicates. [2023-12-15 23:04:36,730 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 23:04:36,732 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 23:04:36,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 11:04:36 BoogieIcfgContainer [2023-12-15 23:04:36,733 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 23:04:36,733 INFO L158 Benchmark]: Toolchain (without parser) took 76154.31ms. Allocated memory was 201.3MB in the beginning and 381.7MB in the end (delta: 180.4MB). Free memory was 161.1MB in the beginning and 242.1MB in the end (delta: -81.1MB). Peak memory consumption was 100.7MB. Max. memory is 8.0GB. [2023-12-15 23:04:36,733 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 201.3MB. Free memory is still 148.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 23:04:36,733 INFO L158 Benchmark]: CACSL2BoogieTranslator took 162.64ms. Allocated memory is still 201.3MB. Free memory was 160.7MB in the beginning and 148.9MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-15 23:04:36,734 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.81ms. Allocated memory is still 201.3MB. Free memory was 148.9MB in the beginning and 147.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 23:04:36,734 INFO L158 Benchmark]: Boogie Preprocessor took 43.36ms. Allocated memory is still 201.3MB. Free memory was 147.1MB in the beginning and 144.3MB in the end (delta: 2.8MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-15 23:04:36,734 INFO L158 Benchmark]: RCFGBuilder took 447.70ms. Allocated memory is still 201.3MB. Free memory was 144.3MB in the beginning and 122.6MB in the end (delta: 21.7MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2023-12-15 23:04:36,734 INFO L158 Benchmark]: TraceAbstraction took 75472.50ms. Allocated memory was 201.3MB in the beginning and 381.7MB in the end (delta: 180.4MB). Free memory was 122.0MB in the beginning and 242.1MB in the end (delta: -120.2MB). Peak memory consumption was 61.9MB. Max. memory is 8.0GB. [2023-12-15 23:04:36,735 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 201.3MB. Free memory is still 148.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 162.64ms. Allocated memory is still 201.3MB. Free memory was 160.7MB in the beginning and 148.9MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 23.81ms. Allocated memory is still 201.3MB. Free memory was 148.9MB in the beginning and 147.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 43.36ms. Allocated memory is still 201.3MB. Free memory was 147.1MB in the beginning and 144.3MB in the end (delta: 2.8MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 447.70ms. Allocated memory is still 201.3MB. Free memory was 144.3MB in the beginning and 122.6MB in the end (delta: 21.7MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. * TraceAbstraction took 75472.50ms. Allocated memory was 201.3MB in the beginning and 381.7MB in the end (delta: 180.4MB). Free memory was 122.0MB in the beginning and 242.1MB in the end (delta: -120.2MB). Peak memory consumption was 61.9MB. 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: 37]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 37). Cancelled while NwaCegarLoop was constructing difference of abstraction (183states) and FLOYD_HOARE automaton (currently 30 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 42 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 75.4s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 51.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 479 SdHoareTripleChecker+Valid, 17.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 442 mSDsluCounter, 1353 SdHoareTripleChecker+Invalid, 17.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 96 IncrementalHoareTripleChecker+Unchecked, 1143 mSDsCounter, 259 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2823 IncrementalHoareTripleChecker+Invalid, 3183 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 259 mSolverCounterUnsat, 210 mSDtfsCounter, 2823 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 467 GetRequests, 260 SyntacticMatches, 17 SemanticMatches, 189 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 49.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=183occurred in iteration=7, InterpolantAutomatonStates: 103, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 39 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 20.4s InterpolantComputationTime, 300 NumberOfCodeBlocks, 300 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 367 ConstructedInterpolants, 55 QuantifiedInterpolants, 7399 SizeOfPredicates, 247 NumberOfNonLiveVariables, 2551 ConjunctsInSsa, 702 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 164/227 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