./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-1loop_file-86.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/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_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-1loop_file-86.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/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_21579d29-c0f2-4a24-9e9f-08c7a135f520/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 0b1bd1257190961b4c1941dc1e9dfbe09ed3b9534a64219badf358449b7e869c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:08:48,138 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:08:48,266 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:08:48,279 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:08:48,281 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:08:48,331 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:08:48,333 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:08:48,334 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:08:48,335 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:08:48,340 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:08:48,341 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:08:48,342 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:08:48,343 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:08:48,345 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:08:48,345 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:08:48,346 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:08:48,346 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:08:48,347 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:08:48,347 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:08:48,348 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:08:48,348 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:08:48,349 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:08:48,349 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:08:48,350 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:08:48,350 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:08:48,351 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:08:48,352 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:08:48,352 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:08:48,353 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:08:48,353 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:08:48,355 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:08:48,355 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:08:48,355 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:08:48,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:08:48,356 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:08:48,356 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:08:48,357 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:08:48,357 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:08:48,357 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:08:48,358 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_21579d29-c0f2-4a24-9e9f-08c7a135f520/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b1bd1257190961b4c1941dc1e9dfbe09ed3b9534a64219badf358449b7e869c [2023-11-06 23:08:48,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:08:48,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:08:48,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:08:48,719 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:08:48,720 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:08:48,721 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-1loop_file-86.i [2023-11-06 23:08:51,928 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:08:52,259 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:08:52,260 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-1loop_file-86.i [2023-11-06 23:08:52,269 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/data/e897a29ef/fcc969fc15b54a3591f477b3c30dd82b/FLAG329e90d55 [2023-11-06 23:08:52,285 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/data/e897a29ef/fcc969fc15b54a3591f477b3c30dd82b [2023-11-06 23:08:52,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:08:52,289 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:08:52,291 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:08:52,291 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:08:52,297 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:08:52,298 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:08:52" (1/1) ... [2023-11-06 23:08:52,299 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ca215b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:52, skipping insertion in model container [2023-11-06 23:08:52,299 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:08:52" (1/1) ... [2023-11-06 23:08:52,327 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:08:52,512 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_21579d29-c0f2-4a24-9e9f-08c7a135f520/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-1loop_file-86.i[915,928] [2023-11-06 23:08:52,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:08:52,576 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:08:52,590 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_21579d29-c0f2-4a24-9e9f-08c7a135f520/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-1loop_file-86.i[915,928] [2023-11-06 23:08:52,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:08:52,635 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:08:52,635 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:52 WrapperNode [2023-11-06 23:08:52,636 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:08:52,637 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:08:52,638 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:08:52,638 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:08:52,646 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:52" (1/1) ... [2023-11-06 23:08:52,655 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:52" (1/1) ... [2023-11-06 23:08:52,692 INFO L138 Inliner]: procedures = 26, calls = 30, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 111 [2023-11-06 23:08:52,692 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:08:52,693 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:08:52,693 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:08:52,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:08:52,704 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:52" (1/1) ... [2023-11-06 23:08:52,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:52" (1/1) ... [2023-11-06 23:08:52,710 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:52" (1/1) ... [2023-11-06 23:08:52,710 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:52" (1/1) ... [2023-11-06 23:08:52,720 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:52" (1/1) ... [2023-11-06 23:08:52,724 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:52" (1/1) ... [2023-11-06 23:08:52,727 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:52" (1/1) ... [2023-11-06 23:08:52,729 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:52" (1/1) ... [2023-11-06 23:08:52,735 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:08:52,736 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:08:52,736 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:08:52,736 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:08:52,737 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:52" (1/1) ... [2023-11-06 23:08:52,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:08:52,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:52,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:08:52,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:08:52,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:08:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 23:08:52,823 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 23:08:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:08:52,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:08:52,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:08:52,947 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:08:52,949 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:08:53,283 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:08:53,296 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:08:53,298 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 23:08:53,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:08:53 BoogieIcfgContainer [2023-11-06 23:08:53,301 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:08:53,305 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:08:53,306 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:08:53,310 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:08:53,311 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:08:52" (1/3) ... [2023-11-06 23:08:53,311 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1a0af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:08:53, skipping insertion in model container [2023-11-06 23:08:53,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:52" (2/3) ... [2023-11-06 23:08:53,314 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1a0af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:08:53, skipping insertion in model container [2023-11-06 23:08:53,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:08:53" (3/3) ... [2023-11-06 23:08:53,316 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_25-1loop_file-86.i [2023-11-06 23:08:53,336 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:08:53,336 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:08:53,384 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:08:53,391 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;@4f45f093, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:08:53,391 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:08:53,396 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.3125) internal successors, (42), 33 states have internal predecessors, (42), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-06 23:08:53,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-06 23:08:53,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:53,411 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:53,412 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:53,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:53,418 INFO L85 PathProgramCache]: Analyzing trace with hash -982157503, now seen corresponding path program 1 times [2023-11-06 23:08:53,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:53,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492206621] [2023-11-06 23:08:53,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:53,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:53,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:53,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492206621] [2023-11-06 23:08:53,612 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 23:08:53,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404484243] [2023-11-06 23:08:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:53,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:53,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:53,617 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:53,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:08:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:53,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 23:08:53,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2023-11-06 23:08:53,959 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:53,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404484243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:53,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:53,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:08:53,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317634723] [2023-11-06 23:08:53,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:53,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:08:53,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:54,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:08:54,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:08:54,006 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 1.3125) internal successors, (42), 33 states have internal predecessors, (42), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-06 23:08:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:54,040 INFO L93 Difference]: Finished difference Result 101 states and 166 transitions. [2023-11-06 23:08:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:08:54,043 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 2 states have call successors, (17) Word has length 108 [2023-11-06 23:08:54,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:54,049 INFO L225 Difference]: With dead ends: 101 [2023-11-06 23:08:54,050 INFO L226 Difference]: Without dead ends: 48 [2023-11-06 23:08:54,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:08:54,057 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:54,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:08:54,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-06 23:08:54,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-06 23:08:54,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-06 23:08:54,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 69 transitions. [2023-11-06 23:08:54,104 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 69 transitions. Word has length 108 [2023-11-06 23:08:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:54,105 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 69 transitions. [2023-11-06 23:08:54,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-06 23:08:54,105 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 69 transitions. [2023-11-06 23:08:54,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-06 23:08:54,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:54,109 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:54,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:54,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:54,312 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:54,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:54,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1646406913, now seen corresponding path program 1 times [2023-11-06 23:08:54,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:54,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097372376] [2023-11-06 23:08:54,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:54,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:54,430 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:08:54,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092423346] [2023-11-06 23:08:54,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:54,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:08:54,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:54,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:08:54,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:08:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:54,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 23:08:54,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 21 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2023-11-06 23:09:23,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-06 23:09:48,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:48,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097372376] [2023-11-06 23:09:48,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:09:48,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092423346] [2023-11-06 23:09:48,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092423346] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:48,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:09:48,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2023-11-06 23:09:48,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955145756] [2023-11-06 23:09:48,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:48,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:09:48,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:48,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:09:48,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=272, Unknown=1, NotChecked=0, Total=342 [2023-11-06 23:09:48,369 INFO L87 Difference]: Start difference. First operand 48 states and 69 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-06 23:09:52,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 23:10:04,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:04,065 INFO L93 Difference]: Finished difference Result 160 states and 231 transitions. [2023-11-06 23:10:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 23:10:04,066 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 108 [2023-11-06 23:10:04,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:04,070 INFO L225 Difference]: With dead ends: 160 [2023-11-06 23:10:04,071 INFO L226 Difference]: Without dead ends: 158 [2023-11-06 23:10:04,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=180, Invalid=811, Unknown=1, NotChecked=0, Total=992 [2023-11-06 23:10:04,074 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 147 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:04,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 414 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 402 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2023-11-06 23:10:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-06 23:10:04,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 92. [2023-11-06 23:10:04,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 58 states have internal predecessors, (70), 32 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-06 23:10:04,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 134 transitions. [2023-11-06 23:10:04,117 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 134 transitions. Word has length 108 [2023-11-06 23:10:04,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:04,119 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 134 transitions. [2023-11-06 23:10:04,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-06 23:10:04,119 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 134 transitions. [2023-11-06 23:10:04,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-06 23:10:04,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:04,122 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:04,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 23:10:04,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:04,329 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:04,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:04,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1644559871, now seen corresponding path program 1 times [2023-11-06 23:10:04,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:04,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649253145] [2023-11-06 23:10:04,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:04,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:04,372 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:10:04,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996319451] [2023-11-06 23:10:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:04,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:04,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:04,374 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:04,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:10:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:04,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 23:10:04,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 21 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2023-11-06 23:10:49,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-06 23:11:18,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:18,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649253145] [2023-11-06 23:11:18,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:11:18,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996319451] [2023-11-06 23:11:18,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996319451] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:18,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:11:18,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2023-11-06 23:11:18,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982914066] [2023-11-06 23:11:18,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:18,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:11:18,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:18,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:11:18,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=275, Unknown=1, NotChecked=0, Total=342 [2023-11-06 23:11:18,051 INFO L87 Difference]: Start difference. First operand 92 states and 134 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-06 23:11:21,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 23:11:37,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:37,251 INFO L93 Difference]: Finished difference Result 158 states and 229 transitions. [2023-11-06 23:11:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 23:11:37,252 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 108 [2023-11-06 23:11:37,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:37,255 INFO L225 Difference]: With dead ends: 158 [2023-11-06 23:11:37,256 INFO L226 Difference]: Without dead ends: 156 [2023-11-06 23:11:37,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=177, Invalid=814, Unknown=1, NotChecked=0, Total=992 [2023-11-06 23:11:37,258 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 138 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:37,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 443 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 504 Invalid, 1 Unknown, 0 Unchecked, 8.9s Time] [2023-11-06 23:11:37,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-11-06 23:11:37,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 92. [2023-11-06 23:11:37,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 58 states have internal predecessors, (70), 32 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-06 23:11:37,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 134 transitions. [2023-11-06 23:11:37,293 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 134 transitions. Word has length 108 [2023-11-06 23:11:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:37,294 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 134 transitions. [2023-11-06 23:11:37,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-06 23:11:37,295 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 134 transitions. [2023-11-06 23:11:37,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-06 23:11:37,297 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:37,297 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:37,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:37,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:37,503 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:37,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:37,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2039433923, now seen corresponding path program 1 times [2023-11-06 23:11:37,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:37,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978839797] [2023-11-06 23:11:37,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:37,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:37,543 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:11:37,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762877506] [2023-11-06 23:11:37,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:37,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:37,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:37,546 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:37,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:11:37,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:37,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 23:11:37,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 21 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2023-11-06 23:11:56,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-06 23:12:17,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:17,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978839797] [2023-11-06 23:12:17,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:12:17,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762877506] [2023-11-06 23:12:17,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762877506] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:17,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:12:17,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 21 [2023-11-06 23:12:17,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455102885] [2023-11-06 23:12:17,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:17,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:12:17,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:17,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:12:17,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=346, Unknown=1, NotChecked=0, Total=420 [2023-11-06 23:12:17,249 INFO L87 Difference]: Start difference. First operand 92 states and 134 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-06 23:12:30,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:30,240 INFO L93 Difference]: Finished difference Result 155 states and 228 transitions. [2023-11-06 23:12:30,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 23:12:30,241 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 108 [2023-11-06 23:12:30,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:30,244 INFO L225 Difference]: With dead ends: 155 [2023-11-06 23:12:30,244 INFO L226 Difference]: Without dead ends: 153 [2023-11-06 23:12:30,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=204, Invalid=985, Unknown=1, NotChecked=0, Total=1190 [2023-11-06 23:12:30,247 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 91 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:30,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 758 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-06 23:12:30,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-06 23:12:30,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 98. [2023-11-06 23:12:30,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 32 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-06 23:12:30,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 142 transitions. [2023-11-06 23:12:30,282 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 142 transitions. Word has length 108 [2023-11-06 23:12:30,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:30,283 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 142 transitions. [2023-11-06 23:12:30,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-06 23:12:30,284 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 142 transitions. [2023-11-06 23:12:30,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:12:30,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:30,287 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:30,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:30,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:30,493 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:30,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:30,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1779968782, now seen corresponding path program 1 times [2023-11-06 23:12:30,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:30,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17837368] [2023-11-06 23:12:30,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:30,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:30,523 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:12:30,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258603880] [2023-11-06 23:12:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:30,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:30,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:30,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:30,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:12:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:30,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 23:12:30,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 21 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2023-11-06 23:12:44,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2023-11-06 23:12:57,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:57,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17837368] [2023-11-06 23:12:57,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:12:57,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258603880] [2023-11-06 23:12:57,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258603880] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:57,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:12:57,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2023-11-06 23:12:57,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014386114] [2023-11-06 23:12:57,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:57,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:12:57,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:57,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:12:57,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:12:57,379 INFO L87 Difference]: Start difference. First operand 98 states and 142 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-06 23:12:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:58,024 INFO L93 Difference]: Finished difference Result 217 states and 309 transitions. [2023-11-06 23:12:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 23:12:58,025 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 109 [2023-11-06 23:12:58,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:58,028 INFO L225 Difference]: With dead ends: 217 [2023-11-06 23:12:58,029 INFO L226 Difference]: Without dead ends: 215 [2023-11-06 23:12:58,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2023-11-06 23:12:58,030 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 185 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:58,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 442 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:12:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-11-06 23:12:58,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 124. [2023-11-06 23:12:58,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 81 states have internal predecessors, (96), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2023-11-06 23:12:58,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 178 transitions. [2023-11-06 23:12:58,080 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 178 transitions. Word has length 109 [2023-11-06 23:12:58,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:58,081 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 178 transitions. [2023-11-06 23:12:58,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2023-11-06 23:12:58,081 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 178 transitions. [2023-11-06 23:12:58,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 23:12:58,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:58,083 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:58,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:58,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:58,289 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:58,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:58,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1778121740, now seen corresponding path program 1 times [2023-11-06 23:12:58,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:58,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191730175] [2023-11-06 23:12:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:58,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:58,316 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:12:58,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473171204] [2023-11-06 23:12:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:58,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:58,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:58,318 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:58,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21579d29-c0f2-4a24-9e9f-08c7a135f520/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:12:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:58,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 23:12:58,424 INFO L285 TraceCheckSpWp]: Computing forward predicates...