./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/simple_4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/simple_4-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9950a3ef699b75b517ce9b65b2c32dbbe13ac0a027bb7e02ceeaeee924f6aade --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:01:56,785 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:01:56,875 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:01:56,880 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:01:56,880 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:01:56,905 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:01:56,905 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:01:56,906 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:01:56,907 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:01:56,907 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:01:56,908 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:01:56,909 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:01:56,909 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:01:56,910 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:01:56,910 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:01:56,911 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:01:56,911 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:01:56,912 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:01:56,912 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:01:56,913 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:01:56,914 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:01:56,914 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:01:56,915 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:01:56,915 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:01:56,916 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:01:56,916 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:01:56,917 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:01:56,917 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:01:56,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:01:56,919 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:01:56,919 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:01:56,920 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:01:56,920 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:01:56,921 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:01:56,921 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:01:56,922 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:01:56,922 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:01:56,923 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:01:56,923 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:01:56,924 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_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9950a3ef699b75b517ce9b65b2c32dbbe13ac0a027bb7e02ceeaeee924f6aade [2023-11-06 23:01:57,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:01:57,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:01:57,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:01:57,261 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:01:57,262 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:01:57,263 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/loop-acceleration/simple_4-1.c [2023-11-06 23:02:00,379 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:02:00,619 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:02:00,620 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/sv-benchmarks/c/loop-acceleration/simple_4-1.c [2023-11-06 23:02:00,631 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/data/1b46758b9/176d3dcb34a44f319abb258e58ec6601/FLAG743a84005 [2023-11-06 23:02:00,646 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/data/1b46758b9/176d3dcb34a44f319abb258e58ec6601 [2023-11-06 23:02:00,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:02:00,656 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:02:00,659 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:02:00,660 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:02:00,666 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:02:00,666 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:02:00" (1/1) ... [2023-11-06 23:02:00,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b72325a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:00, skipping insertion in model container [2023-11-06 23:02:00,668 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:02:00" (1/1) ... [2023-11-06 23:02:00,693 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:02:00,827 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/sv-benchmarks/c/loop-acceleration/simple_4-1.c[322,335] [2023-11-06 23:02:00,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:02:00,849 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:02:00,861 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/sv-benchmarks/c/loop-acceleration/simple_4-1.c[322,335] [2023-11-06 23:02:00,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:02:00,878 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:02:00,879 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:00 WrapperNode [2023-11-06 23:02:00,879 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:02:00,880 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:02:00,880 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:02:00,881 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:02:00,888 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:00" (1/1) ... [2023-11-06 23:02:00,894 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:00" (1/1) ... [2023-11-06 23:02:00,910 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 22 [2023-11-06 23:02:00,910 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:02:00,911 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:02:00,911 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:02:00,912 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:02:00,921 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:00" (1/1) ... [2023-11-06 23:02:00,921 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:00" (1/1) ... [2023-11-06 23:02:00,922 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:00" (1/1) ... [2023-11-06 23:02:00,923 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:00" (1/1) ... [2023-11-06 23:02:00,927 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:00" (1/1) ... [2023-11-06 23:02:00,930 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:00" (1/1) ... [2023-11-06 23:02:00,937 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:00" (1/1) ... [2023-11-06 23:02:00,938 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:00" (1/1) ... [2023-11-06 23:02:00,939 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:02:00,941 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:02:00,941 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:02:00,941 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:02:00,942 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:00" (1/1) ... [2023-11-06 23:02:00,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:02:00,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:00,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:02:01,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:02:01,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:02:01,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:02:01,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:02:01,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:02:01,093 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:02:01,095 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:02:01,233 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:02:01,239 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:02:01,239 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 23:02:01,240 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:02:01 BoogieIcfgContainer [2023-11-06 23:02:01,241 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:02:01,243 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:02:01,243 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:02:01,246 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:02:01,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:02:00" (1/3) ... [2023-11-06 23:02:01,247 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d0d4c00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:02:01, skipping insertion in model container [2023-11-06 23:02:01,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:00" (2/3) ... [2023-11-06 23:02:01,248 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d0d4c00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:02:01, skipping insertion in model container [2023-11-06 23:02:01,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:02:01" (3/3) ... [2023-11-06 23:02:01,249 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_4-1.c [2023-11-06 23:02:01,269 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:02:01,269 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:02:01,315 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:02:01,320 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=LoopsAndPotentialCycles, 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;@2e324019, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:02:01,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:02:01,324 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:01,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 23:02:01,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:02:01,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:02:01,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:02:01,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:01,335 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2023-11-06 23:02:01,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:01,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387271687] [2023-11-06 23:02:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:01,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:01,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:01,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387271687] [2023-11-06 23:02:01,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387271687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:01,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:01,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:02:01,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956496507] [2023-11-06 23:02:01,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:01,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:01,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:01,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:01,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:01,723 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:01,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:02:01,771 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-11-06 23:02:01,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:01,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-06 23:02:01,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:02:01,784 INFO L225 Difference]: With dead ends: 20 [2023-11-06 23:02:01,784 INFO L226 Difference]: Without dead ends: 8 [2023-11-06 23:02:01,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:01,794 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:02:01,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:02:01,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-11-06 23:02:01,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-11-06 23:02:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-11-06 23:02:01,832 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2023-11-06 23:02:01,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:02:01,833 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-11-06 23:02:01,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:01,834 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-11-06 23:02:01,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 23:02:01,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:02:01,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:01,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:02:01,835 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:02:01,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:01,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2023-11-06 23:02:01,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:01,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284333980] [2023-11-06 23:02:01,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:01,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:01,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:01,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284333980] [2023-11-06 23:02:01,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284333980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:01,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58342165] [2023-11-06 23:02:01,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:01,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:01,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:02,003 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:02,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:02:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:02,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:02:02,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:02,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:02,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58342165] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:02,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:02,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-06 23:02:02,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56319502] [2023-11-06 23:02:02,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:02,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:02:02,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:02,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:02:02,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:02:02,193 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:02,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:02:02,256 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2023-11-06 23:02:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:02:02,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-06 23:02:02,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:02:02,257 INFO L225 Difference]: With dead ends: 15 [2023-11-06 23:02:02,257 INFO L226 Difference]: Without dead ends: 11 [2023-11-06 23:02:02,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:02:02,259 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:02:02,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:02:02,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-06 23:02:02,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-06 23:02:02,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:02,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2023-11-06 23:02:02,265 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2023-11-06 23:02:02,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:02:02,266 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2023-11-06 23:02:02,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:02,266 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2023-11-06 23:02:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 23:02:02,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:02:02,267 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:02,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 23:02:02,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:02,472 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:02:02,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:02,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 2 times [2023-11-06 23:02:02,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:02,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485050058] [2023-11-06 23:02:02,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:02,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:02,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:02,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485050058] [2023-11-06 23:02:02,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485050058] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:02,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587278980] [2023-11-06 23:02:02,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:02:02,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:02,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:02,638 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:02,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:02:02,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:02:02,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:02,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:02:02,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:02,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:02,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587278980] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:02,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:02,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 23:02:02,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897467050] [2023-11-06 23:02:02,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:02,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 23:02:02,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:02,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 23:02:02,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:02:02,925 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:03,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:02:03,419 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2023-11-06 23:02:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:02:03,420 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 23:02:03,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:02:03,420 INFO L225 Difference]: With dead ends: 21 [2023-11-06 23:02:03,420 INFO L226 Difference]: Without dead ends: 17 [2023-11-06 23:02:03,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:02:03,423 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:02:03,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 15 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:02:03,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-06 23:02:03,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-06 23:02:03,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:03,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2023-11-06 23:02:03,430 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2023-11-06 23:02:03,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:02:03,431 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2023-11-06 23:02:03,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:03,431 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2023-11-06 23:02:03,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 23:02:03,431 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:02:03,431 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:03,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:03,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:03,632 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:02:03,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:03,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 3 times [2023-11-06 23:02:03,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:03,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790151252] [2023-11-06 23:02:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:03,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:04,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:04,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790151252] [2023-11-06 23:02:04,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790151252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:04,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462025005] [2023-11-06 23:02:04,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:02:04,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:04,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:04,051 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:04,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:02:04,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 23:02:04,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:04,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 23:02:04,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:04,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:04,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462025005] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:04,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:04,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15] total 27 [2023-11-06 23:02:04,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629584007] [2023-11-06 23:02:04,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:04,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 23:02:04,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:04,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 23:02:04,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2023-11-06 23:02:04,782 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:24,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:02:24,706 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2023-11-06 23:02:24,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 23:02:24,709 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-06 23:02:24,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:02:24,710 INFO L225 Difference]: With dead ends: 35 [2023-11-06 23:02:24,710 INFO L226 Difference]: Without dead ends: 29 [2023-11-06 23:02:24,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=517, Invalid=965, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 23:02:24,712 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 32 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:02:24,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 45 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-06 23:02:24,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-06 23:02:24,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-06 23:02:24,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:24,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2023-11-06 23:02:24,730 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 16 [2023-11-06 23:02:24,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:02:24,731 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2023-11-06 23:02:24,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:24,732 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2023-11-06 23:02:24,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 23:02:24,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:02:24,733 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:24,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:24,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:24,934 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:02:24,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:24,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1394044683, now seen corresponding path program 4 times [2023-11-06 23:02:24,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:24,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786004227] [2023-11-06 23:02:24,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:24,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:25,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:25,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:25,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786004227] [2023-11-06 23:02:25,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786004227] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:25,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236841012] [2023-11-06 23:02:25,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:02:25,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:25,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:25,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:25,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa3c9e1b-1eea-4dfb-8d4b-c6a90ffbac7d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:02:25,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:02:25,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:25,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-06 23:02:25,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:25,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:27,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236841012] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:27,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:27,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-11-06 23:02:27,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841603875] [2023-11-06 23:02:27,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:27,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-06 23:02:27,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:27,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-06 23:02:27,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 23:02:27,263 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:29,617 WARN L839 $PredicateComparison]: unable to prove that (and (< 1 (mod (+ 4294967276 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967264) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967268) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967258) 4294967296)) (< 1 (mod (+ 4294967274 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967272 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967290) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967262) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967284) 4294967296)) (< 1 (mod (+ 4294967260 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967252) 4294967296)) (< 1 (mod (+ 4294967292 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967270) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967266) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967256) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967286) 4294967296)) (< 1 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967254) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967278) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967288) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967280) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967294) 4294967296)) (< 1 (mod (+ 4294967282 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) is different from false [2023-11-06 23:02:31,649 WARN L839 $PredicateComparison]: unable to prove that (and (< 1 (mod (+ 4294967276 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967264) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967268) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967258) 4294967296)) (< 1 (mod (+ 4294967274 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967272 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967290) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967262) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967284) 4294967296)) (< 1 (mod (+ 4294967260 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967292 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967270) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967266) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967256) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967286) 4294967296)) (< 1 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967254) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967278) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967288) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967280) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967294) 4294967296)) (< 1 (mod (+ 4294967282 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) is different from false [2023-11-06 23:02:33,665 WARN L839 $PredicateComparison]: unable to prove that (and (< 1 (mod (+ 4294967276 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967264) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967268) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967258) 4294967296)) (< 1 (mod (+ 4294967274 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967272 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967290) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967262) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967284) 4294967296)) (< 1 (mod (+ 4294967260 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967292 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967270) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967266) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967256) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967286) 4294967296)) (< 1 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967278) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967288) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967280) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967294) 4294967296)) (< 1 (mod (+ 4294967282 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) is different from false [2023-11-06 23:03:24,952 WARN L293 SmtUtils]: Spent 37.20s on a formula simplification. DAG size of input: 82 DAG size of output: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:03:26,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 23:03:30,097 WARN L839 $PredicateComparison]: unable to prove that (and (< 1 (mod (+ 4294967276 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967264) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967268) 4294967296)) (< 1 (mod (+ 4294967274 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967272 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967290) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967262) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967284) 4294967296)) (< 1 (mod (+ 4294967260 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967292 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967270) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967266) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967286) 4294967296)) (< 1 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967278) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967288) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967280) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967294) 4294967296)) (< 1 (mod (+ 4294967282 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) is different from false [2023-11-06 23:04:06,810 WARN L293 SmtUtils]: Spent 23.20s on a formula simplification. DAG size of input: 74 DAG size of output: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:04:40,643 WARN L293 SmtUtils]: Spent 21.63s on a formula simplification. DAG size of input: 70 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:05:08,131 WARN L293 SmtUtils]: Spent 13.99s on a formula simplification. DAG size of input: 66 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:05:29,966 WARN L293 SmtUtils]: Spent 15.67s on a formula simplification. DAG size of input: 62 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:05:53,939 WARN L293 SmtUtils]: Spent 10.93s on a formula simplification. DAG size of input: 58 DAG size of output: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:06:08,969 WARN L293 SmtUtils]: Spent 9.61s on a formula simplification. DAG size of input: 54 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:06:20,503 WARN L293 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 50 DAG size of output: 50 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)