./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ssina.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_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/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_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ssina.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/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_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/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 4c9ca6c94ff0fae82185b19014fc033eef7a37c04f3b092e10c4eebb38e41241 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:03:45,518 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:03:45,606 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:03:45,617 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:03:45,620 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:03:45,655 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:03:45,657 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:03:45,658 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:03:45,659 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:03:45,664 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:03:45,666 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:03:45,666 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:03:45,667 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:03:45,669 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:03:45,669 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:03:45,669 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:03:45,670 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:03:45,670 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:03:45,671 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:03:45,671 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:03:45,672 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:03:45,672 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:03:45,673 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:03:45,673 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:03:45,674 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:03:45,674 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:03:45,675 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:03:45,675 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:03:45,676 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:03:45,676 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:03:45,677 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:03:45,678 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:03:45,678 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:03:45,678 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:03:45,678 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:03:45,679 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:03:45,679 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:03:45,679 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:03:45,679 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:03:45,680 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_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c9ca6c94ff0fae82185b19014fc033eef7a37c04f3b092e10c4eebb38e41241 [2023-11-06 23:03:46,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:03:46,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:03:46,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:03:46,090 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:03:46,090 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:03:46,092 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/array-fpi/ssina.c [2023-11-06 23:03:49,270 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:03:49,460 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:03:49,461 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/sv-benchmarks/c/array-fpi/ssina.c [2023-11-06 23:03:49,469 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/data/d4f0ef80e/b27badd5239a498b9dbb98d91d1172c2/FLAG82e0e0a30 [2023-11-06 23:03:49,485 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/data/d4f0ef80e/b27badd5239a498b9dbb98d91d1172c2 [2023-11-06 23:03:49,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:03:49,490 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:03:49,491 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:03:49,492 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:03:49,499 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:03:49,500 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:49" (1/1) ... [2023-11-06 23:03:49,502 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56b508d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:49, skipping insertion in model container [2023-11-06 23:03:49,502 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:49" (1/1) ... [2023-11-06 23:03:49,526 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:03:49,682 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_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/sv-benchmarks/c/array-fpi/ssina.c[588,601] [2023-11-06 23:03:49,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:03:49,717 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:03:49,733 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_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/sv-benchmarks/c/array-fpi/ssina.c[588,601] [2023-11-06 23:03:49,746 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:03:49,762 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:03:49,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:49 WrapperNode [2023-11-06 23:03:49,762 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:03:49,764 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:03:49,764 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:03:49,764 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:03:49,772 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:49" (1/1) ... [2023-11-06 23:03:49,781 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:49" (1/1) ... [2023-11-06 23:03:49,819 INFO L138 Inliner]: procedures = 17, calls = 37, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 119 [2023-11-06 23:03:49,819 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:03:49,820 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:03:49,820 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:03:49,821 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:03:49,830 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:49" (1/1) ... [2023-11-06 23:03:49,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:49" (1/1) ... [2023-11-06 23:03:49,833 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:49" (1/1) ... [2023-11-06 23:03:49,834 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:49" (1/1) ... [2023-11-06 23:03:49,841 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:49" (1/1) ... [2023-11-06 23:03:49,846 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:49" (1/1) ... [2023-11-06 23:03:49,848 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:49" (1/1) ... [2023-11-06 23:03:49,849 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:49" (1/1) ... [2023-11-06 23:03:49,852 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:03:49,853 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:03:49,853 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:03:49,853 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:03:49,854 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:49" (1/1) ... [2023-11-06 23:03:49,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:03:49,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:49,897 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:03:49,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:03:49,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:03:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:03:49,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:03:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:03:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:03:49,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:03:49,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:03:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:03:49,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:03:50,052 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:03:50,054 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:03:50,396 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:03:50,406 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:03:50,415 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-06 23:03:50,418 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:50 BoogieIcfgContainer [2023-11-06 23:03:50,419 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:03:50,421 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:03:50,422 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:03:50,426 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:03:50,426 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:03:49" (1/3) ... [2023-11-06 23:03:50,427 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@546fa3eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:50, skipping insertion in model container [2023-11-06 23:03:50,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:49" (2/3) ... [2023-11-06 23:03:50,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@546fa3eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:50, skipping insertion in model container [2023-11-06 23:03:50,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:50" (3/3) ... [2023-11-06 23:03:50,432 INFO L112 eAbstractionObserver]: Analyzing ICFG ssina.c [2023-11-06 23:03:50,483 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:03:50,483 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:03:50,553 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:03:50,562 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;@336ca593, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:03:50,562 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:03:50,567 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 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 23:03:50,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 23:03:50,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:50,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:50,580 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:50,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:50,588 INFO L85 PathProgramCache]: Analyzing trace with hash -635308358, now seen corresponding path program 1 times [2023-11-06 23:03:50,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:50,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2441617] [2023-11-06 23:03:50,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:50,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:50,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:50,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2441617] [2023-11-06 23:03:50,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 23:03:50,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034519268] [2023-11-06 23:03:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:50,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:50,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:50,794 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:50,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:03:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:50,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 23:03:50,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:50,944 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 23:03:50,945 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:50,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034519268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:50,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:50,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:03:50,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344792857] [2023-11-06 23:03:50,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:50,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:03:50,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:50,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:03:50,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:03:50,998 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 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 2 states, 2 states have (on average 9.0) internal successors, (18), 2 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 23:03:51,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:51,025 INFO L93 Difference]: Finished difference Result 56 states and 82 transitions. [2023-11-06 23:03:51,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:03:51,027 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 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 18 [2023-11-06 23:03:51,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:51,033 INFO L225 Difference]: With dead ends: 56 [2023-11-06 23:03:51,033 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 23:03:51,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 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 23:03:51,039 INFO L413 NwaCegarLoop]: 36 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, 36 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 23:03:51,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:03:51,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 23:03:51,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-06 23:03:51,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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 23:03:51,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-06 23:03:51,071 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2023-11-06 23:03:51,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:51,071 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-06 23:03:51,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 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 23:03:51,072 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-06 23:03:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 23:03:51,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:51,073 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:51,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:51,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 23:03:51,279 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:51,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:51,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1344199344, now seen corresponding path program 1 times [2023-11-06 23:03:51,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:51,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465117932] [2023-11-06 23:03:51,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:51,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:51,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:51,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465117932] [2023-11-06 23:03:51,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 23:03:51,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292164398] [2023-11-06 23:03:51,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:51,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:51,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:51,344 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:51,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:03:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:51,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:03:51,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:51,554 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 23:03:51,554 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:51,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292164398] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:51,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:51,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:03:51,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318383737] [2023-11-06 23:03:51,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:51,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:03:51,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:51,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:03:51,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:51,561 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 23:03:51,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:51,669 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2023-11-06 23:03:51,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:03:51,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 18 [2023-11-06 23:03:51,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:51,674 INFO L225 Difference]: With dead ends: 61 [2023-11-06 23:03:51,674 INFO L226 Difference]: Without dead ends: 42 [2023-11-06 23:03:51,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:51,676 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 52 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:51,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 18 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:03:51,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-06 23:03:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2023-11-06 23:03:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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 23:03:51,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-11-06 23:03:51,695 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 18 [2023-11-06 23:03:51,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:51,696 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-11-06 23:03:51,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 23:03:51,697 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-11-06 23:03:51,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 23:03:51,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:51,699 INFO L195 NwaCegarLoop]: trace histogram [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 23:03:51,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:51,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:51,905 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:51,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:51,906 INFO L85 PathProgramCache]: Analyzing trace with hash -933126362, now seen corresponding path program 1 times [2023-11-06 23:03:51,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:51,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698589892] [2023-11-06 23:03:51,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:51,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:51,980 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:03:51,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979904152] [2023-11-06 23:03:51,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:51,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:51,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:51,990 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:52,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:03:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:52,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-06 23:03:52,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:52,260 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 23:03:52,285 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:03:52,376 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-06 23:03:52,647 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-11-06 23:03:52,802 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-11-06 23:03:52,891 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-11-06 23:03:52,976 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-11-06 23:03:53,149 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-11-06 23:03:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:53,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:57,511 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:03:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:57,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:57,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698589892] [2023-11-06 23:03:57,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:03:57,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979904152] [2023-11-06 23:03:57,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979904152] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:57,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:03:57,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2023-11-06 23:03:57,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695657310] [2023-11-06 23:03:57,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:57,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 23:03:57,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:57,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 23:03:57,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=962, Unknown=1, NotChecked=0, Total=1122 [2023-11-06 23:03:57,725 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 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 23:04:12,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:12,338 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2023-11-06 23:04:12,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 23:04:12,339 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 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 28 [2023-11-06 23:04:12,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:12,341 INFO L225 Difference]: With dead ends: 80 [2023-11-06 23:04:12,342 INFO L226 Difference]: Without dead ends: 78 [2023-11-06 23:04:12,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=380, Invalid=2375, Unknown=1, NotChecked=0, Total=2756 [2023-11-06 23:04:12,345 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:12,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 187 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-11-06 23:04:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-06 23:04:12,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2023-11-06 23:04:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 53 states have internal predecessors, (65), 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 23:04:12,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2023-11-06 23:04:12,365 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 28 [2023-11-06 23:04:12,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:12,365 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2023-11-06 23:04:12,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 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 23:04:12,366 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2023-11-06 23:04:12,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 23:04:12,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:12,367 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:12,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:12,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:12,568 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:12,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:12,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1642466588, now seen corresponding path program 2 times [2023-11-06 23:04:12,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:12,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291221316] [2023-11-06 23:04:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:12,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:12,622 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:12,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150789501] [2023-11-06 23:04:12,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:04:12,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:12,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:12,636 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:12,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:04:12,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:04:12,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:12,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:04:12,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:12,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:12,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:12,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291221316] [2023-11-06 23:04:12,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:12,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150789501] [2023-11-06 23:04:12,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150789501] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:12,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:12,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-06 23:04:12,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397015775] [2023-11-06 23:04:12,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:12,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:04:12,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:12,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:04:12,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:04:12,869 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 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 23:04:13,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:13,119 INFO L93 Difference]: Finished difference Result 126 states and 148 transitions. [2023-11-06 23:04:13,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:04:13,120 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 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 30 [2023-11-06 23:04:13,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:13,124 INFO L225 Difference]: With dead ends: 126 [2023-11-06 23:04:13,124 INFO L226 Difference]: Without dead ends: 78 [2023-11-06 23:04:13,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:04:13,130 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 87 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:13,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 44 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:04:13,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-06 23:04:13,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2023-11-06 23:04:13,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 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 23:04:13,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2023-11-06 23:04:13,158 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 30 [2023-11-06 23:04:13,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:13,159 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2023-11-06 23:04:13,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 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 23:04:13,159 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2023-11-06 23:04:13,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 23:04:13,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:13,161 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:13,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:13,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:13,367 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:13,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:13,367 INFO L85 PathProgramCache]: Analyzing trace with hash -396360796, now seen corresponding path program 3 times [2023-11-06 23:04:13,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:13,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307855075] [2023-11-06 23:04:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:13,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:13,403 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:13,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477080336] [2023-11-06 23:04:13,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:04:13,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:13,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:13,414 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:13,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:04:13,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:04:13,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:13,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:04:13,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:13,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:13,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:13,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307855075] [2023-11-06 23:04:13,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:13,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477080336] [2023-11-06 23:04:13,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477080336] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:13,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:13,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-06 23:04:13,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416484926] [2023-11-06 23:04:13,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:13,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:04:13,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:13,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:04:13,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:04:13,635 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 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 23:04:13,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:13,816 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2023-11-06 23:04:13,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:04:13,817 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 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 30 [2023-11-06 23:04:13,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:13,818 INFO L225 Difference]: With dead ends: 74 [2023-11-06 23:04:13,818 INFO L226 Difference]: Without dead ends: 57 [2023-11-06 23:04:13,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:04:13,819 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 142 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:13,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 35 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:04:13,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-06 23:04:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2023-11-06 23:04:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 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 23:04:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2023-11-06 23:04:13,833 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 30 [2023-11-06 23:04:13,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:13,833 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2023-11-06 23:04:13,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 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 23:04:13,834 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2023-11-06 23:04:13,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-06 23:04:13,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:13,835 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:13,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:14,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:14,048 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:14,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:14,048 INFO L85 PathProgramCache]: Analyzing trace with hash 389318684, now seen corresponding path program 4 times [2023-11-06 23:04:14,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:14,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380721164] [2023-11-06 23:04:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:14,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:14,087 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:14,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509725220] [2023-11-06 23:04:14,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:04:14,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:14,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:14,089 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:14,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c406f3da-9fd9-44df-8cde-f10b5ff82a0d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:04:14,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:04:14,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:04:14,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-06 23:04:14,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:14,296 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 23:04:14,307 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:04:14,342 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-06 23:04:14,437 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 23:04:14,438 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-06 23:04:14,651 INFO L322 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2023-11-06 23:04:14,652 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 35 [2023-11-06 23:04:14,783 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-11-06 23:04:15,029 INFO L322 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-06 23:04:15,030 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 31 [2023-11-06 23:04:15,153 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 23:04:15,153 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2023-11-06 23:04:15,291 INFO L322 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-06 23:04:15,291 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 31 [2023-11-06 23:04:15,375 INFO L322 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2023-11-06 23:04:15,376 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 35 [2023-11-06 23:04:15,538 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-11-06 23:04:15,731 INFO L322 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-06 23:04:15,732 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 31 [2023-11-06 23:04:15,873 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 23:04:15,874 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 24 [2023-11-06 23:04:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:16,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:04:33,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:33,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380721164] [2023-11-06 23:04:33,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:33,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509725220] [2023-11-06 23:04:33,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509725220] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:33,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:33,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 55 [2023-11-06 23:04:33,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888962646] [2023-11-06 23:04:33,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:33,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-06 23:04:33,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:33,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-06 23:04:33,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=2640, Unknown=0, NotChecked=0, Total=2970 [2023-11-06 23:04:33,052 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 55 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 55 states have internal predecessors, (73), 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 23:04:54,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-06 23:04:58,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-06 23:06:19,755 WARN L293 SmtUtils]: Spent 12.90s on a formula simplification. DAG size of input: 261 DAG size of output: 177 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:06:51,931 WARN L293 SmtUtils]: Spent 12.12s on a formula simplification. DAG size of input: 178 DAG size of output: 178 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:06:55,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-06 23:07:24,685 WARN L293 SmtUtils]: Spent 12.82s on a formula simplification. DAG size of input: 177 DAG size of output: 177 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 23:07:34,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers []