./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/EvenOdd01-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-numeric/EvenOdd01-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 93e64a210ad8295ef3e6c8bf5a4996e01ec752ae44f5068490e5115d4dda29b5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:38:19,666 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:38:19,739 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-64bit-Automizer_Default.epf [2023-11-28 20:38:19,745 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:38:19,746 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:38:19,773 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:38:19,774 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:38:19,774 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:38:19,775 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:38:19,776 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:38:19,776 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:38:19,777 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:38:19,778 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:38:19,778 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:38:19,779 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:38:19,779 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:38:19,780 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:38:19,781 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:38:19,781 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:38:19,782 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:38:19,782 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:38:19,783 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:38:19,784 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-28 20:38:19,784 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 20:38:19,784 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:38:19,785 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:38:19,785 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:38:19,786 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:38:19,786 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:38:19,787 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:38:19,787 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:38:19,787 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:38:19,788 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:38:19,788 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:38:19,789 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:38:19,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:38:19,789 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:38:19,789 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:38:19,789 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:38:19,790 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:38:19,790 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:38:19,790 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93e64a210ad8295ef3e6c8bf5a4996e01ec752ae44f5068490e5115d4dda29b5 [2023-11-28 20:38:20,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:38:20,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:38:20,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:38:20,064 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:38:20,064 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:38:20,065 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/termination-numeric/EvenOdd01-2.c [2023-11-28 20:38:22,947 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:38:23,152 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:38:23,153 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/sv-benchmarks/c/termination-numeric/EvenOdd01-2.c [2023-11-28 20:38:23,160 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/data/09b9bd568/9e96208961e24af3813c68c21168fc09/FLAG045716ac5 [2023-11-28 20:38:23,175 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/data/09b9bd568/9e96208961e24af3813c68c21168fc09 [2023-11-28 20:38:23,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:38:23,179 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:38:23,180 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:38:23,180 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:38:23,187 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:38:23,187 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:38:23" (1/1) ... [2023-11-28 20:38:23,189 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e3b050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:23, skipping insertion in model container [2023-11-28 20:38:23,189 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:38:23" (1/1) ... [2023-11-28 20:38:23,215 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:38:23,409 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:38:23,422 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:38:23,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:38:23,459 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:38:23,460 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:23 WrapperNode [2023-11-28 20:38:23,460 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:38:23,462 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:38:23,462 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:38:23,462 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:38:23,471 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:23" (1/1) ... [2023-11-28 20:38:23,479 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:23" (1/1) ... [2023-11-28 20:38:23,498 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2023-11-28 20:38:23,499 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:38:23,500 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:38:23,500 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:38:23,500 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:38:23,514 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:23" (1/1) ... [2023-11-28 20:38:23,514 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:23" (1/1) ... [2023-11-28 20:38:23,516 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:23" (1/1) ... [2023-11-28 20:38:23,528 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-28 20:38:23,529 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:23" (1/1) ... [2023-11-28 20:38:23,529 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:23" (1/1) ... [2023-11-28 20:38:23,532 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:23" (1/1) ... [2023-11-28 20:38:23,534 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:23" (1/1) ... [2023-11-28 20:38:23,535 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:23" (1/1) ... [2023-11-28 20:38:23,536 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:23" (1/1) ... [2023-11-28 20:38:23,537 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:38:23,538 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:38:23,538 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:38:23,538 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:38:23,539 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:23" (1/1) ... [2023-11-28 20:38:23,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:38:23,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:38:23,574 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:38:23,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:38:23,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:38:23,617 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2023-11-28 20:38:23,618 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2023-11-28 20:38:23,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:38:23,618 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2023-11-28 20:38:23,618 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2023-11-28 20:38:23,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:38:23,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:38:23,705 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:38:23,708 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:38:23,870 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:38:23,896 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:38:23,897 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-28 20:38:23,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:38:23 BoogieIcfgContainer [2023-11-28 20:38:23,898 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:38:23,901 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:38:23,901 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:38:23,904 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:38:23,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:38:23" (1/3) ... [2023-11-28 20:38:23,905 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fde2ee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:38:23, skipping insertion in model container [2023-11-28 20:38:23,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:38:23" (2/3) ... [2023-11-28 20:38:23,905 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fde2ee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:38:23, skipping insertion in model container [2023-11-28 20:38:23,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:38:23" (3/3) ... [2023-11-28 20:38:23,907 INFO L112 eAbstractionObserver]: Analyzing ICFG EvenOdd01-2.c [2023-11-28 20:38:23,923 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:38:23,924 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-28 20:38:23,969 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:38:23,976 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;@99a846a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:38:23,976 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-28 20:38:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-28 20:38:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-28 20:38:23,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:38:23,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:38:23,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-28 20:38:23,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:23,998 INFO L85 PathProgramCache]: Analyzing trace with hash 329054099, now seen corresponding path program 1 times [2023-11-28 20:38:24,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:24,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503259592] [2023-11-28 20:38:24,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:24,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:24,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:24,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503259592] [2023-11-28 20:38:24,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503259592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:38:24,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:38:24,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:38:24,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600250590] [2023-11-28 20:38:24,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:38:24,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:38:24,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:24,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:38:24,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:38:24,294 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:24,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:38:24,416 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2023-11-28 20:38:24,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:38:24,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-28 20:38:24,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:38:24,428 INFO L225 Difference]: With dead ends: 45 [2023-11-28 20:38:24,428 INFO L226 Difference]: Without dead ends: 26 [2023-11-28 20:38:24,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:38:24,437 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 20 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:38:24,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 92 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:38:24,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-28 20:38:24,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-11-28 20:38:24,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:24,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2023-11-28 20:38:24,475 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 7 [2023-11-28 20:38:24,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:38:24,476 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2023-11-28 20:38:24,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:24,476 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2023-11-28 20:38:24,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-28 20:38:24,477 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:38:24,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:38:24,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:38:24,478 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-28 20:38:24,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:24,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1610742535, now seen corresponding path program 1 times [2023-11-28 20:38:24,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:24,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595204542] [2023-11-28 20:38:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:24,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:24,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:24,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595204542] [2023-11-28 20:38:24,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595204542] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:38:24,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:38:24,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:38:24,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141291211] [2023-11-28 20:38:24,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:38:24,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:38:24,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:24,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:38:24,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:38:24,618 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:24,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:38:24,666 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2023-11-28 20:38:24,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:38:24,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-28 20:38:24,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:38:24,668 INFO L225 Difference]: With dead ends: 26 [2023-11-28 20:38:24,668 INFO L226 Difference]: Without dead ends: 25 [2023-11-28 20:38:24,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:38:24,671 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:38:24,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 48 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:38:24,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-28 20:38:24,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-11-28 20:38:24,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2023-11-28 20:38:24,679 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 8 [2023-11-28 20:38:24,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:38:24,679 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2023-11-28 20:38:24,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:24,680 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2023-11-28 20:38:24,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-28 20:38:24,680 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:38:24,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:38:24,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 20:38:24,681 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-28 20:38:24,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:24,682 INFO L85 PathProgramCache]: Analyzing trace with hash -641802699, now seen corresponding path program 1 times [2023-11-28 20:38:24,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:24,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945394211] [2023-11-28 20:38:24,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:24,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:24,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:24,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945394211] [2023-11-28 20:38:24,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945394211] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:38:24,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:38:24,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 20:38:24,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696274521] [2023-11-28 20:38:24,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:38:24,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:38:24,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:24,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:38:24,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:38:24,805 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:24,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:38:24,902 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2023-11-28 20:38:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 20:38:24,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-28 20:38:24,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:38:24,904 INFO L225 Difference]: With dead ends: 33 [2023-11-28 20:38:24,904 INFO L226 Difference]: Without dead ends: 32 [2023-11-28 20:38:24,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:38:24,906 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:38:24,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 44 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:38:24,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-28 20:38:24,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2023-11-28 20:38:24,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 24 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2023-11-28 20:38:24,915 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 13 [2023-11-28 20:38:24,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:38:24,915 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2023-11-28 20:38:24,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:24,916 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2023-11-28 20:38:24,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-28 20:38:24,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:38:24,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:38:24,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 20:38:24,917 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-28 20:38:24,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:24,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1578952853, now seen corresponding path program 1 times [2023-11-28 20:38:24,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:24,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772609500] [2023-11-28 20:38:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:24,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:25,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:25,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772609500] [2023-11-28 20:38:25,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772609500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:38:25,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:38:25,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:38:25,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929940646] [2023-11-28 20:38:25,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:38:25,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:38:25,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:25,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:38:25,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:38:25,031 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:25,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:38:25,101 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2023-11-28 20:38:25,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:38:25,102 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-28 20:38:25,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:38:25,103 INFO L225 Difference]: With dead ends: 29 [2023-11-28 20:38:25,103 INFO L226 Difference]: Without dead ends: 27 [2023-11-28 20:38:25,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:38:25,105 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:38:25,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 15 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:38:25,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-28 20:38:25,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-28 20:38:25,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:25,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2023-11-28 20:38:25,113 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2023-11-28 20:38:25,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:38:25,113 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2023-11-28 20:38:25,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:25,113 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2023-11-28 20:38:25,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-28 20:38:25,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:38:25,114 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:38:25,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 20:38:25,115 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-28 20:38:25,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:25,116 INFO L85 PathProgramCache]: Analyzing trace with hash -89420187, now seen corresponding path program 1 times [2023-11-28 20:38:25,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:25,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127451444] [2023-11-28 20:38:25,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:25,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:25,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:25,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127451444] [2023-11-28 20:38:25,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127451444] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:38:25,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382998863] [2023-11-28 20:38:25,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:25,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:25,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:38:25,267 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:38:25,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:38:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:25,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:38:25,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:38:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:25,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:38:25,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:25,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382998863] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:38:25,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:38:25,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-28 20:38:25,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235024320] [2023-11-28 20:38:25,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:38:25,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-28 20:38:25,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:25,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-28 20:38:25,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-28 20:38:25,558 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 16 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:25,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:38:25,782 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2023-11-28 20:38:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 20:38:25,783 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-28 20:38:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:38:25,785 INFO L225 Difference]: With dead ends: 49 [2023-11-28 20:38:25,785 INFO L226 Difference]: Without dead ends: 47 [2023-11-28 20:38:25,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2023-11-28 20:38:25,787 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:38:25,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 65 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:38:25,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-28 20:38:25,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-11-28 20:38:25,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 7 states have call successors, (7), 7 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:25,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2023-11-28 20:38:25,799 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 19 [2023-11-28 20:38:25,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:38:25,800 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2023-11-28 20:38:25,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:25,800 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2023-11-28 20:38:25,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-28 20:38:25,802 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:38:25,802 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2023-11-28 20:38:25,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:38:26,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:26,003 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-28 20:38:26,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:26,004 INFO L85 PathProgramCache]: Analyzing trace with hash 343594457, now seen corresponding path program 1 times [2023-11-28 20:38:26,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:26,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014024088] [2023-11-28 20:38:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:26,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:26,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:26,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014024088] [2023-11-28 20:38:26,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014024088] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:38:26,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951690285] [2023-11-28 20:38:26,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:26,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:26,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:38:26,329 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:38:26,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:38:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:26,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 20:38:26,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:38:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:26,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:38:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:26,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951690285] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:38:26,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:38:26,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-11-28 20:38:26,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999226731] [2023-11-28 20:38:26,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:38:26,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-28 20:38:26,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:26,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-28 20:38:26,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2023-11-28 20:38:26,809 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 28 states, 25 states have (on average 2.44) internal successors, (61), 16 states have internal predecessors, (61), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:27,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:38:27,244 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2023-11-28 20:38:27,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-28 20:38:27,246 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.44) internal successors, (61), 16 states have internal predecessors, (61), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-28 20:38:27,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:38:27,247 INFO L225 Difference]: With dead ends: 91 [2023-11-28 20:38:27,248 INFO L226 Difference]: Without dead ends: 89 [2023-11-28 20:38:27,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2023-11-28 20:38:27,250 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 110 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:38:27,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 81 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:38:27,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-28 20:38:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2023-11-28 20:38:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2023-11-28 20:38:27,267 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 37 [2023-11-28 20:38:27,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:38:27,267 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2023-11-28 20:38:27,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.44) internal successors, (61), 16 states have internal predecessors, (61), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:27,268 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2023-11-28 20:38:27,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-28 20:38:27,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:38:27,271 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1] [2023-11-28 20:38:27,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:38:27,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-28 20:38:27,477 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-28 20:38:27,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:27,478 INFO L85 PathProgramCache]: Analyzing trace with hash 305757055, now seen corresponding path program 2 times [2023-11-28 20:38:27,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:27,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110510844] [2023-11-28 20:38:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:27,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:28,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:28,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110510844] [2023-11-28 20:38:28,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110510844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:38:28,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036991507] [2023-11-28 20:38:28,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:38:28,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:28,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:38:28,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:38:28,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:38:28,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:38:28,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:38:28,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-28 20:38:28,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:38:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:28,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:38:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:29,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036991507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:38:29,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:38:29,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2023-11-28 20:38:29,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120175665] [2023-11-28 20:38:29,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:38:29,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-28 20:38:29,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:29,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-28 20:38:29,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2656, Unknown=0, NotChecked=0, Total=3080 [2023-11-28 20:38:29,211 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 56 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 30 states have internal predecessors, (131), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:30,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:38:30,256 INFO L93 Difference]: Finished difference Result 169 states and 180 transitions. [2023-11-28 20:38:30,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-28 20:38:30,257 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 30 states have internal predecessors, (131), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-11-28 20:38:30,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:38:30,260 INFO L225 Difference]: With dead ends: 169 [2023-11-28 20:38:30,260 INFO L226 Difference]: Without dead ends: 167 [2023-11-28 20:38:30,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=970, Invalid=5510, Unknown=0, NotChecked=0, Total=6480 [2023-11-28 20:38:30,265 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 330 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:38:30,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 75 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:38:30,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-28 20:38:30,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2023-11-28 20:38:30,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 137 states have internal predecessors, (138), 27 states have call successors, (27), 27 states have call predecessors, (27), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:30,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2023-11-28 20:38:30,292 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 79 [2023-11-28 20:38:30,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:38:30,293 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2023-11-28 20:38:30,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 30 states have internal predecessors, (131), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:30,293 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2023-11-28 20:38:30,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-11-28 20:38:30,297 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:38:30,298 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1] [2023-11-28 20:38:30,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:38:30,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-28 20:38:30,500 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-28 20:38:30,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:30,501 INFO L85 PathProgramCache]: Analyzing trace with hash -352348147, now seen corresponding path program 2 times [2023-11-28 20:38:30,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:30,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032642320] [2023-11-28 20:38:30,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:30,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:32,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:32,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032642320] [2023-11-28 20:38:32,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032642320] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:38:32,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476354206] [2023-11-28 20:38:32,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:38:32,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:32,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:38:32,639 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:38:32,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:38:32,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:38:32,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:38:32,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-28 20:38:32,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:38:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:33,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:38:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:35,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476354206] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:38:35,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:38:35,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2023-11-28 20:38:35,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597412097] [2023-11-28 20:38:35,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:38:35,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-11-28 20:38:35,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:35,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-11-28 20:38:35,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=10042, Unknown=0, NotChecked=0, Total=11556 [2023-11-28 20:38:35,467 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand has 108 states, 105 states have (on average 2.4857142857142858) internal successors, (261), 56 states have internal predecessors, (261), 52 states have call successors, (52), 52 states have call predecessors, (52), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:37,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:38:37,817 INFO L93 Difference]: Finished difference Result 331 states and 356 transitions. [2023-11-28 20:38:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-11-28 20:38:37,818 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 105 states have (on average 2.4857142857142858) internal successors, (261), 56 states have internal predecessors, (261), 52 states have call successors, (52), 52 states have call predecessors, (52), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2023-11-28 20:38:37,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:38:37,821 INFO L225 Difference]: With dead ends: 331 [2023-11-28 20:38:37,821 INFO L226 Difference]: Without dead ends: 329 [2023-11-28 20:38:37,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7600 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3672, Invalid=21768, Unknown=0, NotChecked=0, Total=25440 [2023-11-28 20:38:37,830 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 645 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:38:37,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 94 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 20:38:37,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-11-28 20:38:37,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2023-11-28 20:38:37,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 271 states have (on average 1.007380073800738) internal successors, (273), 272 states have internal predecessors, (273), 54 states have call successors, (54), 54 states have call predecessors, (54), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2023-11-28 20:38:37,867 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 157 [2023-11-28 20:38:37,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:38:37,868 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2023-11-28 20:38:37,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 105 states have (on average 2.4857142857142858) internal successors, (261), 56 states have internal predecessors, (261), 52 states have call successors, (52), 52 states have call predecessors, (52), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:37,869 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2023-11-28 20:38:37,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2023-11-28 20:38:37,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:38:37,879 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1] [2023-11-28 20:38:37,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:38:38,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:38,082 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-28 20:38:38,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:38,082 INFO L85 PathProgramCache]: Analyzing trace with hash 541733351, now seen corresponding path program 3 times [2023-11-28 20:38:38,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:38,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561031510] [2023-11-28 20:38:38,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:38,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 0 proven. 4004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:43,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:43,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561031510] [2023-11-28 20:38:43,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561031510] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:38:43,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743985224] [2023-11-28 20:38:43,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:38:43,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:43,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:38:43,796 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:38:43,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:38:43,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2023-11-28 20:38:43,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:38:43,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 108 conjunts are in the unsatisfiable core [2023-11-28 20:38:43,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:38:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 0 proven. 4004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:44,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:38:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 0 proven. 4004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:51,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743985224] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:38:51,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:38:51,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 215 [2023-11-28 20:38:51,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512294919] [2023-11-28 20:38:51,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:38:51,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 216 states [2023-11-28 20:38:51,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:51,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2023-11-28 20:38:51,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5944, Invalid=40496, Unknown=0, NotChecked=0, Total=46440 [2023-11-28 20:38:51,306 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand has 216 states, 213 states have (on average 2.492957746478873) internal successors, (531), 110 states have internal predecessors, (531), 106 states have call successors, (106), 106 states have call predecessors, (106), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:59,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:38:59,157 INFO L93 Difference]: Finished difference Result 649 states and 700 transitions. [2023-11-28 20:38:59,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2023-11-28 20:38:59,158 INFO L78 Accepts]: Start accepts. Automaton has has 216 states, 213 states have (on average 2.492957746478873) internal successors, (531), 110 states have internal predecessors, (531), 106 states have call successors, (106), 106 states have call predecessors, (106), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 319 [2023-11-28 20:38:59,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:38:59,162 INFO L225 Difference]: With dead ends: 649 [2023-11-28 20:38:59,162 INFO L226 Difference]: Without dead ends: 647 [2023-11-28 20:38:59,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32497 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=14530, Invalid=88190, Unknown=0, NotChecked=0, Total=102720 [2023-11-28 20:38:59,169 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2190 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2190 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:38:59,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2190 Valid, 109 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-28 20:38:59,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2023-11-28 20:38:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 645. [2023-11-28 20:38:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 536 states have (on average 1.0037313432835822) internal successors, (538), 537 states have internal predecessors, (538), 107 states have call successors, (107), 107 states have call predecessors, (107), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:59,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 645 transitions. [2023-11-28 20:38:59,228 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 645 transitions. Word has length 319 [2023-11-28 20:38:59,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:38:59,229 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 645 transitions. [2023-11-28 20:38:59,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 216 states, 213 states have (on average 2.492957746478873) internal successors, (531), 110 states have internal predecessors, (531), 106 states have call successors, (106), 106 states have call predecessors, (106), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:59,229 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 645 transitions. [2023-11-28 20:38:59,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 638 [2023-11-28 20:38:59,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:38:59,243 INFO L195 NwaCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 53, 53, 52, 52, 52, 1, 1, 1, 1] [2023-11-28 20:38:59,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:38:59,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:59,443 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-28 20:38:59,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:59,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2014095581, now seen corresponding path program 3 times [2023-11-28 20:38:59,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:59,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087438396] [2023-11-28 20:38:59,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:59,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16432 backedges. 0 proven. 16432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:22,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:22,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087438396] [2023-11-28 20:39:22,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087438396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:22,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716038896] [2023-11-28 20:39:22,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:39:22,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:22,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:22,086 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:22,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:39:22,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2023-11-28 20:39:22,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:39:22,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 214 conjunts are in the unsatisfiable core [2023-11-28 20:39:22,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16432 backedges. 0 proven. 16432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:23,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16432 backedges. 0 proven. 16432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:48,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716038896] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:48,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:48,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 214, 214] total 427 [2023-11-28 20:39:48,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925743247] [2023-11-28 20:39:48,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:48,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 428 states [2023-11-28 20:39:48,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:48,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 428 interpolants. [2023-11-28 20:39:48,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23114, Invalid=159642, Unknown=0, NotChecked=0, Total=182756 [2023-11-28 20:39:48,620 INFO L87 Difference]: Start difference. First operand 645 states and 645 transitions. Second operand has 428 states, 425 states have (on average 2.496470588235294) internal successors, (1061), 216 states have internal predecessors, (1061), 212 states have call successors, (212), 212 states have call predecessors, (212), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:18,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:40:18,269 INFO L93 Difference]: Finished difference Result 1291 states and 1396 transitions. [2023-11-28 20:40:18,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 428 states. [2023-11-28 20:40:18,271 INFO L78 Accepts]: Start accepts. Automaton has has 428 states, 425 states have (on average 2.496470588235294) internal successors, (1061), 216 states have internal predecessors, (1061), 212 states have call successors, (212), 212 states have call predecessors, (212), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 637 [2023-11-28 20:40:18,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:40:18,277 INFO L225 Difference]: With dead ends: 1291 [2023-11-28 20:40:18,277 INFO L226 Difference]: Without dead ends: 1289 [2023-11-28 20:40:18,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1698 GetRequests, 1060 SyntacticMatches, 0 SemanticMatches, 638 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132720 ImplicationChecksByTransitivity, 55.6s TimeCoverageRelationStatistics Valid=57352, Invalid=351608, Unknown=0, NotChecked=0, Total=408960 [2023-11-28 20:40:18,295 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4160 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2484 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4160 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:40:18,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4160 Valid, 118 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2484 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-28 20:40:18,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2023-11-28 20:40:18,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1287. [2023-11-28 20:40:18,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1071 states have (on average 1.0018674136321195) internal successors, (1073), 1072 states have internal predecessors, (1073), 214 states have call successors, (214), 214 states have call predecessors, (214), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:18,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 1287 transitions. [2023-11-28 20:40:18,353 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 1287 transitions. Word has length 637 [2023-11-28 20:40:18,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:40:18,354 INFO L495 AbstractCegarLoop]: Abstraction has 1287 states and 1287 transitions. [2023-11-28 20:40:18,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 428 states, 425 states have (on average 2.496470588235294) internal successors, (1061), 216 states have internal predecessors, (1061), 212 states have call successors, (212), 212 states have call predecessors, (212), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:18,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 1287 transitions. [2023-11-28 20:40:18,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1280 [2023-11-28 20:40:18,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:40:18,365 INFO L195 NwaCegarLoop]: trace histogram [107, 107, 107, 106, 106, 106, 106, 106, 106, 106, 106, 106, 1, 1, 1, 1] [2023-11-28 20:40:18,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:40:18,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-28 20:40:18,566 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-28 20:40:18,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:18,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1467143289, now seen corresponding path program 4 times [2023-11-28 20:40:18,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:18,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552898014] [2023-11-28 20:40:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:18,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 67204 backedges. 0 proven. 67204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:10,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:10,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552898014] [2023-11-28 20:42:10,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552898014] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:10,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281564043] [2023-11-28 20:42:10,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:42:10,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:10,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:10,435 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:10,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:42:11,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:42:11,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:42:11,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 2153 conjuncts, 428 conjunts are in the unsatisfiable core [2023-11-28 20:42:11,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:42:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 67204 backedges. 0 proven. 67204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:12,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 67204 backedges. 0 proven. 67204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:43:40,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281564043] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:43:40,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:43:40,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [428, 428, 428] total 855 [2023-11-28 20:43:40,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184794475] [2023-11-28 20:43:40,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:43:40,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 856 states [2023-11-28 20:43:40,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:43:40,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 856 interpolants. [2023-11-28 20:43:40,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92024, Invalid=639856, Unknown=0, NotChecked=0, Total=731880 [2023-11-28 20:43:40,165 INFO L87 Difference]: Start difference. First operand 1287 states and 1287 transitions. Second operand has 856 states, 853 states have (on average 2.4982415005861665) internal successors, (2131), 430 states have internal predecessors, (2131), 426 states have call successors, (426), 426 states have call predecessors, (426), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:09,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:46:09,087 INFO L93 Difference]: Finished difference Result 2569 states and 2780 transitions. [2023-11-28 20:46:09,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 854 states. [2023-11-28 20:46:09,089 INFO L78 Accepts]: Start accepts. Automaton has has 856 states, 853 states have (on average 2.4982415005861665) internal successors, (2131), 430 states have internal predecessors, (2131), 426 states have call successors, (426), 426 states have call predecessors, (426), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1279 [2023-11-28 20:46:09,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:46:09,099 INFO L225 Difference]: With dead ends: 2569 [2023-11-28 20:46:09,100 INFO L226 Difference]: Without dead ends: 2567 [2023-11-28 20:46:09,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3409 GetRequests, 2130 SyntacticMatches, 0 SemanticMatches, 1279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539537 ImplicationChecksByTransitivity, 197.4s TimeCoverageRelationStatistics Valid=228770, Invalid=1410910, Unknown=0, NotChecked=0, Total=1639680 [2023-11-28 20:46:09,190 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9740 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 4835 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9740 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 4942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 4835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:46:09,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9740 Valid, 117 Invalid, 4942 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [107 Valid, 4835 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-28 20:46:09,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2023-11-28 20:46:09,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2565. [2023-11-28 20:46:09,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2565 states, 2136 states have (on average 1.000936329588015) internal successors, (2138), 2137 states have internal predecessors, (2138), 427 states have call successors, (427), 427 states have call predecessors, (427), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 2565 transitions. [2023-11-28 20:46:09,370 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 2565 transitions. Word has length 1279 [2023-11-28 20:46:09,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:46:09,373 INFO L495 AbstractCegarLoop]: Abstraction has 2565 states and 2565 transitions. [2023-11-28 20:46:09,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 856 states, 853 states have (on average 2.4982415005861665) internal successors, (2131), 430 states have internal predecessors, (2131), 426 states have call successors, (426), 426 states have call predecessors, (426), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:46:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 2565 transitions. [2023-11-28 20:46:09,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2558 [2023-11-28 20:46:09,427 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:46:09,428 INFO L195 NwaCegarLoop]: trace histogram [213, 213, 213, 213, 213, 213, 213, 213, 213, 212, 212, 212, 1, 1, 1, 1] [2023-11-28 20:46:09,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 20:46:09,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6447263-1c72-4093-bbf4-c36eee3b034e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-28 20:46:09,629 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-28 20:46:09,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:46:09,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1600220189, now seen corresponding path program 4 times [2023-11-28 20:46:09,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:46:09,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650908482] [2023-11-28 20:46:09,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:46:09,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:46:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat