./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep05-1.i --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_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/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_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep05-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/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_aa9a6c98-d883-47b2-9a4b-8304e0962c13/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 ac50477087b7e2b9c80860ad42d4d46d99ddf32e797cee205c21d5ff44f08ec3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:35:37,866 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:35:37,979 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:35:37,983 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:35:37,984 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:35:38,037 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:35:38,038 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:35:38,039 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:35:38,039 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:35:38,040 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:35:38,041 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:35:38,041 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:35:38,042 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:35:38,042 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:35:38,043 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:35:38,043 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:35:38,044 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:35:38,044 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:35:38,045 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:35:38,045 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:35:38,046 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:35:38,047 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:35:38,047 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:35:38,048 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:35:38,048 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:35:38,049 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:35:38,049 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:35:38,049 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:35:38,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:35:38,050 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:35:38,051 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:35:38,051 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:35:38,052 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:35:38,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:35:38,052 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:35:38,053 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:35:38,053 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:35:38,054 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:35:38,054 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:35:38,054 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_aa9a6c98-d883-47b2-9a4b-8304e0962c13/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac50477087b7e2b9c80860ad42d4d46d99ddf32e797cee205c21d5ff44f08ec3 [2023-11-06 22:35:38,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:35:38,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:35:38,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:35:38,324 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:35:38,324 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:35:38,326 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/reducercommutativity/sep05-1.i [2023-11-06 22:35:41,354 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:35:41,689 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:35:41,689 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/sv-benchmarks/c/reducercommutativity/sep05-1.i [2023-11-06 22:35:41,702 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/data/295e5a4d3/7f8c8df3656946d3bd00b587b88916ce/FLAG1c2b51b9e [2023-11-06 22:35:41,727 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/data/295e5a4d3/7f8c8df3656946d3bd00b587b88916ce [2023-11-06 22:35:41,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:35:41,742 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:35:41,744 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:35:41,744 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:35:41,750 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:35:41,751 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:35:41" (1/1) ... [2023-11-06 22:35:41,752 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d0b9ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:41, skipping insertion in model container [2023-11-06 22:35:41,753 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:35:41" (1/1) ... [2023-11-06 22:35:41,785 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:35:42,017 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_aa9a6c98-d883-47b2-9a4b-8304e0962c13/sv-benchmarks/c/reducercommutativity/sep05-1.i[1287,1300] [2023-11-06 22:35:42,024 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:35:42,036 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:35:42,077 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_aa9a6c98-d883-47b2-9a4b-8304e0962c13/sv-benchmarks/c/reducercommutativity/sep05-1.i[1287,1300] [2023-11-06 22:35:42,081 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:35:42,098 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:35:42,099 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:42 WrapperNode [2023-11-06 22:35:42,099 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:35:42,100 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:35:42,101 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:35:42,101 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:35:42,110 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:42" (1/1) ... [2023-11-06 22:35:42,118 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:42" (1/1) ... [2023-11-06 22:35:42,149 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-11-06 22:35:42,149 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:35:42,150 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:35:42,150 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:35:42,151 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:35:42,161 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:42" (1/1) ... [2023-11-06 22:35:42,161 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:42" (1/1) ... [2023-11-06 22:35:42,164 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:42" (1/1) ... [2023-11-06 22:35:42,165 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:42" (1/1) ... [2023-11-06 22:35:42,174 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:42" (1/1) ... [2023-11-06 22:35:42,180 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:42" (1/1) ... [2023-11-06 22:35:42,182 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:42" (1/1) ... [2023-11-06 22:35:42,183 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:42" (1/1) ... [2023-11-06 22:35:42,185 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:35:42,186 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:35:42,187 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:35:42,187 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:35:42,188 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:42" (1/1) ... [2023-11-06 22:35:42,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:35:42,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:35:42,229 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:35:42,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:35:42,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:35:42,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:35:42,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:35:42,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:35:42,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:35:42,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:35:42,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:35:42,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:35:42,266 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-11-06 22:35:42,266 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-11-06 22:35:42,340 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:35:42,342 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:35:42,550 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:35:42,557 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:35:42,557 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:35:42,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:35:42 BoogieIcfgContainer [2023-11-06 22:35:42,559 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:35:42,561 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:35:42,562 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:35:42,565 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:35:42,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:35:41" (1/3) ... [2023-11-06 22:35:42,566 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d27dc38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:35:42, skipping insertion in model container [2023-11-06 22:35:42,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:42" (2/3) ... [2023-11-06 22:35:42,567 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d27dc38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:35:42, skipping insertion in model container [2023-11-06 22:35:42,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:35:42" (3/3) ... [2023-11-06 22:35:42,568 INFO L112 eAbstractionObserver]: Analyzing ICFG sep05-1.i [2023-11-06 22:35:42,585 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:35:42,585 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:35:42,629 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:35:42,637 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;@18d5705b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:35:42,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:35:42,647 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:35:42,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 22:35:42,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:35:42,661 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:35:42,661 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:35:42,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:35:42,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1179968903, now seen corresponding path program 1 times [2023-11-06 22:35:42,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:35:42,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573166532] [2023-11-06 22:35:42,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:42,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:35:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:42,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-06 22:35:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:42,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-06 22:35:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:42,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-06 22:35:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:35:42,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:35:42,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573166532] [2023-11-06 22:35:42,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573166532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:35:42,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:35:42,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:35:42,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366354523] [2023-11-06 22:35:42,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:35:43,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:35:43,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:35:43,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:35:43,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:35:43,039 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:35:43,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:35:43,088 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2023-11-06 22:35:43,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:35:43,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-11-06 22:35:43,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:35:43,097 INFO L225 Difference]: With dead ends: 54 [2023-11-06 22:35:43,097 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 22:35:43,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:35:43,103 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:35:43,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:35:43,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 22:35:43,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-11-06 22:35:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:35:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-11-06 22:35:43,139 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 29 [2023-11-06 22:35:43,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:35:43,139 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-11-06 22:35:43,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:35:43,140 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-11-06 22:35:43,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-06 22:35:43,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:35:43,142 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:35:43,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:35:43,143 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:35:43,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:35:43,144 INFO L85 PathProgramCache]: Analyzing trace with hash 802434324, now seen corresponding path program 1 times [2023-11-06 22:35:43,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:35:43,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052282934] [2023-11-06 22:35:43,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:43,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:35:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:43,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 22:35:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:43,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 22:35:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:43,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-06 22:35:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:35:43,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:35:43,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052282934] [2023-11-06 22:35:43,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052282934] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:35:43,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793943965] [2023-11-06 22:35:43,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:43,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:43,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:35:43,382 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:35:43,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:35:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:43,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:35:43,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:35:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 22:35:43,544 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:35:43,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793943965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:35:43,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:35:43,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-06 22:35:43,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60875829] [2023-11-06 22:35:43,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:35:43,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:35:43,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:35:43,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:35:43,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:35:43,555 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:35:43,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:35:43,590 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2023-11-06 22:35:43,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:35:43,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-11-06 22:35:43,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:35:43,595 INFO L225 Difference]: With dead ends: 46 [2023-11-06 22:35:43,595 INFO L226 Difference]: Without dead ends: 28 [2023-11-06 22:35:43,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:35:43,600 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:35:43,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 51 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:35:43,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-06 22:35:43,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-11-06 22:35:43,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:35:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-06 22:35:43,612 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 31 [2023-11-06 22:35:43,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:35:43,612 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-06 22:35:43,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:35:43,613 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-06 22:35:43,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-06 22:35:43,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:35:43,614 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:35:43,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:35:43,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:43,824 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:35:43,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:35:43,825 INFO L85 PathProgramCache]: Analyzing trace with hash -621262767, now seen corresponding path program 1 times [2023-11-06 22:35:43,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:35:43,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459459482] [2023-11-06 22:35:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:43,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:35:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:44,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 22:35:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:44,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-06 22:35:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:44,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-06 22:35:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-06 22:35:44,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:35:44,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459459482] [2023-11-06 22:35:44,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459459482] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:35:44,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760891258] [2023-11-06 22:35:44,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:44,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:44,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:35:44,195 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:35:44,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:35:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:44,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:35:44,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:35:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-06 22:35:44,351 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:35:44,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760891258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:35:44,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:35:44,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-06 22:35:44,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35549263] [2023-11-06 22:35:44,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:35:44,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:35:44,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:35:44,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:35:44,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:35:44,359 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:35:44,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:35:44,387 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2023-11-06 22:35:44,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:35:44,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2023-11-06 22:35:44,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:35:44,389 INFO L225 Difference]: With dead ends: 42 [2023-11-06 22:35:44,390 INFO L226 Difference]: Without dead ends: 28 [2023-11-06 22:35:44,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:35:44,394 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:35:44,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:35:44,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-06 22:35:44,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-11-06 22:35:44,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:35:44,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-11-06 22:35:44,415 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 40 [2023-11-06 22:35:44,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:35:44,417 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-11-06 22:35:44,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:35:44,418 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-11-06 22:35:44,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-06 22:35:44,423 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:35:44,423 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:35:44,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:35:44,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:44,630 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:35:44,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:35:44,631 INFO L85 PathProgramCache]: Analyzing trace with hash -862308077, now seen corresponding path program 1 times [2023-11-06 22:35:44,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:35:44,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132880422] [2023-11-06 22:35:44,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:44,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:35:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:44,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 22:35:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:44,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-06 22:35:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:44,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-06 22:35:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:35:44,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:35:44,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132880422] [2023-11-06 22:35:44,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132880422] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:35:44,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006224665] [2023-11-06 22:35:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:44,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:44,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:35:44,875 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:35:44,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:35:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:44,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:35:44,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:35:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-06 22:35:45,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:35:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-06 22:35:45,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006224665] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:35:45,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:35:45,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-11-06 22:35:45,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531341231] [2023-11-06 22:35:45,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:35:45,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:35:45,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:35:45,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:35:45,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:35:45,122 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 22:35:45,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:35:45,200 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2023-11-06 22:35:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:35:45,201 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2023-11-06 22:35:45,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:35:45,203 INFO L225 Difference]: With dead ends: 60 [2023-11-06 22:35:45,203 INFO L226 Difference]: Without dead ends: 38 [2023-11-06 22:35:45,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:35:45,206 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:35:45,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 115 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:35:45,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-06 22:35:45,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-11-06 22:35:45,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:35:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-11-06 22:35:45,220 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 42 [2023-11-06 22:35:45,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:35:45,220 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-11-06 22:35:45,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 22:35:45,221 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-11-06 22:35:45,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-06 22:35:45,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:35:45,222 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:35:45,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 22:35:45,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:45,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:35:45,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:35:45,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1359434988, now seen corresponding path program 2 times [2023-11-06 22:35:45,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:35:45,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139891479] [2023-11-06 22:35:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:45,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:35:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:45,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-06 22:35:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:45,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-06 22:35:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:45,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-06 22:35:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-06 22:35:45,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:35:45,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139891479] [2023-11-06 22:35:45,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139891479] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:35:45,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706643179] [2023-11-06 22:35:45,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:35:45,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:45,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:35:45,568 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:35:45,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:35:45,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:35:45,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:35:45,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:35:45,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:35:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-11-06 22:35:45,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:35:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-11-06 22:35:45,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706643179] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:35:45,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:35:45,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 9 [2023-11-06 22:35:45,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628265508] [2023-11-06 22:35:45,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:35:45,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:35:45,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:35:45,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:35:45,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:35:45,825 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-06 22:35:45,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:35:45,879 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2023-11-06 22:35:45,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:35:45,879 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 57 [2023-11-06 22:35:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:35:45,882 INFO L225 Difference]: With dead ends: 66 [2023-11-06 22:35:45,882 INFO L226 Difference]: Without dead ends: 41 [2023-11-06 22:35:45,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 110 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:35:45,883 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:35:45,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 90 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:35:45,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-06 22:35:45,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-11-06 22:35:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:35:45,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2023-11-06 22:35:45,899 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 57 [2023-11-06 22:35:45,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:35:45,916 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2023-11-06 22:35:45,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-06 22:35:45,916 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2023-11-06 22:35:45,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-06 22:35:45,924 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:35:45,925 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:35:45,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:35:46,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:46,131 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:35:46,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:35:46,131 INFO L85 PathProgramCache]: Analyzing trace with hash -233764568, now seen corresponding path program 3 times [2023-11-06 22:35:46,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:35:46,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076702258] [2023-11-06 22:35:46,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:46,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:35:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:46,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-06 22:35:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:46,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-06 22:35:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:46,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-06 22:35:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-06 22:35:46,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:35:46,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076702258] [2023-11-06 22:35:46,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076702258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:35:46,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077932414] [2023-11-06 22:35:46,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:35:46,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:46,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:35:46,355 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:35:46,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:35:46,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:35:46,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:35:46,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:35:46,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:35:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-06 22:35:46,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:35:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-06 22:35:46,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077932414] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:35:46,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:35:46,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-11-06 22:35:46,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692970324] [2023-11-06 22:35:46,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:35:46,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:35:46,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:35:46,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:35:46,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:35:46,535 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 22:35:46,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:35:46,569 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2023-11-06 22:35:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:35:46,569 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 61 [2023-11-06 22:35:46,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:35:46,570 INFO L225 Difference]: With dead ends: 74 [2023-11-06 22:35:46,571 INFO L226 Difference]: Without dead ends: 49 [2023-11-06 22:35:46,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:35:46,572 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:35:46,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 79 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:35:46,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-06 22:35:46,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-06 22:35:46,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:35:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2023-11-06 22:35:46,579 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 61 [2023-11-06 22:35:46,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:35:46,580 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2023-11-06 22:35:46,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 22:35:46,580 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2023-11-06 22:35:46,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-06 22:35:46,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:35:46,581 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:35:46,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:35:46,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:46,787 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:35:46,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:35:46,788 INFO L85 PathProgramCache]: Analyzing trace with hash -2048998115, now seen corresponding path program 4 times [2023-11-06 22:35:46,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:35:46,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836991967] [2023-11-06 22:35:46,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:46,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:35:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:46,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-06 22:35:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:46,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-06 22:35:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:46,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-11-06 22:35:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2023-11-06 22:35:47,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:35:47,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836991967] [2023-11-06 22:35:47,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836991967] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:35:47,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10269621] [2023-11-06 22:35:47,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:35:47,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:47,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:35:47,008 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:35:47,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:35:47,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:35:47,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:35:47,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:35:47,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:35:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 180 proven. 4 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-06 22:35:47,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:35:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2023-11-06 22:35:47,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10269621] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:35:47,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:35:47,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-11-06 22:35:47,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009299932] [2023-11-06 22:35:47,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:35:47,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:35:47,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:35:47,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:35:47,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:35:47,238 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:35:47,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:35:47,273 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2023-11-06 22:35:47,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:35:47,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 88 [2023-11-06 22:35:47,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:35:47,276 INFO L225 Difference]: With dead ends: 79 [2023-11-06 22:35:47,276 INFO L226 Difference]: Without dead ends: 53 [2023-11-06 22:35:47,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:35:47,280 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:35:47,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 73 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:35:47,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-06 22:35:47,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-06 22:35:47,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:35:47,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2023-11-06 22:35:47,287 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 88 [2023-11-06 22:35:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:35:47,287 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2023-11-06 22:35:47,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:35:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2023-11-06 22:35:47,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-06 22:35:47,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:35:47,289 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:35:47,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:35:47,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:35:47,495 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:35:47,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:35:47,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1511214559, now seen corresponding path program 5 times [2023-11-06 22:35:47,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:35:47,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98962791] [2023-11-06 22:35:47,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:47,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:35:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:49,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-06 22:35:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:49,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-06 22:35:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:49,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-06 22:35:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-11-06 22:35:50,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:35:50,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98962791] [2023-11-06 22:35:50,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98962791] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:35:50,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624494488] [2023-11-06 22:35:50,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:35:50,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:50,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:35:50,056 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:35:50,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:35:50,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-06 22:35:50,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:35:50,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-06 22:35:50,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:35:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-11-06 22:35:50,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:35:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-11-06 22:35:51,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624494488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:35:51,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:35:51,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-06 22:35:51,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913792528] [2023-11-06 22:35:51,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:35:51,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:35:51,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:35:51,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:35:51,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:35:51,565 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 19 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-06 22:35:52,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:35:52,112 INFO L93 Difference]: Finished difference Result 148 states and 206 transitions. [2023-11-06 22:35:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:35:52,112 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 19 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 92 [2023-11-06 22:35:52,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:35:52,117 INFO L225 Difference]: With dead ends: 148 [2023-11-06 22:35:52,117 INFO L226 Difference]: Without dead ends: 144 [2023-11-06 22:35:52,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:35:52,119 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 33 mSDsluCounter, 1281 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:35:52,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 1355 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:35:52,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-11-06 22:35:52,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 109. [2023-11-06 22:35:52,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 101 states have (on average 1.2574257425742574) internal successors, (127), 102 states have internal predecessors, (127), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-06 22:35:52,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 141 transitions. [2023-11-06 22:35:52,159 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 141 transitions. Word has length 92 [2023-11-06 22:35:52,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:35:52,160 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 141 transitions. [2023-11-06 22:35:52,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 19 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-06 22:35:52,161 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 141 transitions. [2023-11-06 22:35:52,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-06 22:35:52,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:35:52,170 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:35:52,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:35:52,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:52,378 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:35:52,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:35:52,379 INFO L85 PathProgramCache]: Analyzing trace with hash -831156189, now seen corresponding path program 1 times [2023-11-06 22:35:52,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:35:52,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785841480] [2023-11-06 22:35:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:52,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:35:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:54,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-06 22:35:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:55,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-06 22:35:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:55,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-06 22:35:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 90 proven. 271 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 22:35:55,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:35:55,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785841480] [2023-11-06 22:35:55,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785841480] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:35:55,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581002958] [2023-11-06 22:35:55,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:55,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:55,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:35:55,599 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:35:55,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:35:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:55,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-06 22:35:55,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:35:55,936 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-06 22:35:56,001 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:35:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 181 proven. 132 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-11-06 22:35:56,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:35:57,682 INFO L322 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2023-11-06 22:35:57,684 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-11-06 22:35:57,750 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 191 proven. 120 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-06 22:35:57,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581002958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:35:57,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:35:57,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17, 15] total 47 [2023-11-06 22:35:57,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442558095] [2023-11-06 22:35:57,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:35:57,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-06 22:35:57,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:35:57,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-06 22:35:57,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2005, Unknown=0, NotChecked=0, Total=2162 [2023-11-06 22:35:57,757 INFO L87 Difference]: Start difference. First operand 109 states and 141 transitions. Second operand has 47 states, 45 states have (on average 2.8666666666666667) internal successors, (129), 44 states have internal predecessors, (129), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-06 22:36:05,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:05,849 INFO L93 Difference]: Finished difference Result 693 states and 990 transitions. [2023-11-06 22:36:05,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-11-06 22:36:05,850 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 2.8666666666666667) internal successors, (129), 44 states have internal predecessors, (129), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 92 [2023-11-06 22:36:05,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:05,856 INFO L225 Difference]: With dead ends: 693 [2023-11-06 22:36:05,856 INFO L226 Difference]: Without dead ends: 542 [2023-11-06 22:36:05,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6381 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1443, Invalid=18579, Unknown=0, NotChecked=0, Total=20022 [2023-11-06 22:36:05,867 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 292 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:05,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 780 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-06 22:36:05,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-11-06 22:36:05,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 329. [2023-11-06 22:36:05,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 307 states have (on average 1.3257328990228012) internal successors, (407), 313 states have internal predecessors, (407), 10 states have call successors, (10), 5 states have call predecessors, (10), 11 states have return successors, (45), 10 states have call predecessors, (45), 10 states have call successors, (45) [2023-11-06 22:36:05,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 462 transitions. [2023-11-06 22:36:05,947 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 462 transitions. Word has length 92 [2023-11-06 22:36:05,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:05,947 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 462 transitions. [2023-11-06 22:36:05,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 2.8666666666666667) internal successors, (129), 44 states have internal predecessors, (129), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-06 22:36:05,948 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 462 transitions. [2023-11-06 22:36:05,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-06 22:36:05,952 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:05,952 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:05,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-06 22:36:06,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:06,158 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:06,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:06,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1253049121, now seen corresponding path program 2 times [2023-11-06 22:36:06,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:06,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914800583] [2023-11-06 22:36:06,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:06,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:08,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-06 22:36:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:09,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-06 22:36:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:09,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-06 22:36:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 89 proven. 280 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-06 22:36:09,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:09,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914800583] [2023-11-06 22:36:09,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914800583] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:09,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32649472] [2023-11-06 22:36:09,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:36:09,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:09,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:09,835 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:09,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:36:09,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:36:09,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:36:09,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-06 22:36:09,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:10,032 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 22:36:10,247 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:36:10,247 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 22 [2023-11-06 22:36:10,408 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:36:10,408 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2023-11-06 22:36:10,558 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:36:10,559 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-11-06 22:36:10,725 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:36:10,725 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-11-06 22:36:10,907 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:36:10,907 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 32 [2023-11-06 22:36:10,993 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:36:10,993 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 42 treesize of output 18 [2023-11-06 22:36:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 12 proven. 367 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-06 22:36:11,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 116 proven. 235 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-06 22:36:13,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32649472] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:13,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:13,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 33, 24] total 66 [2023-11-06 22:36:13,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301788048] [2023-11-06 22:36:13,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:13,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-11-06 22:36:13,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:13,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-11-06 22:36:13,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=3990, Unknown=0, NotChecked=0, Total=4290 [2023-11-06 22:36:13,689 INFO L87 Difference]: Start difference. First operand 329 states and 462 transitions. Second operand has 66 states, 66 states have (on average 2.409090909090909) internal successors, (159), 65 states have internal predecessors, (159), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-06 22:36:19,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:19,346 INFO L93 Difference]: Finished difference Result 1710 states and 2502 transitions. [2023-11-06 22:36:19,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-06 22:36:19,347 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.409090909090909) internal successors, (159), 65 states have internal predecessors, (159), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) Word has length 92 [2023-11-06 22:36:19,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:19,370 INFO L225 Difference]: With dead ends: 1710 [2023-11-06 22:36:19,370 INFO L226 Difference]: Without dead ends: 1304 [2023-11-06 22:36:19,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2703 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=903, Invalid=8997, Unknown=0, NotChecked=0, Total=9900 [2023-11-06 22:36:19,379 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 135 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 3442 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 3472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:19,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1577 Invalid, 3472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3442 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-06 22:36:19,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2023-11-06 22:36:19,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 708. [2023-11-06 22:36:19,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 660 states have (on average 1.3393939393939394) internal successors, (884), 677 states have internal predecessors, (884), 19 states have call successors, (19), 11 states have call predecessors, (19), 28 states have return successors, (109), 19 states have call predecessors, (109), 19 states have call successors, (109) [2023-11-06 22:36:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1012 transitions. [2023-11-06 22:36:19,583 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1012 transitions. Word has length 92 [2023-11-06 22:36:19,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:19,584 INFO L495 AbstractCegarLoop]: Abstraction has 708 states and 1012 transitions. [2023-11-06 22:36:19,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.409090909090909) internal successors, (159), 65 states have internal predecessors, (159), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-06 22:36:19,585 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1012 transitions. [2023-11-06 22:36:19,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-06 22:36:19,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:19,592 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:19,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:19,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:36:19,799 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:19,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:19,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1503889059, now seen corresponding path program 3 times [2023-11-06 22:36:19,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:19,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280063040] [2023-11-06 22:36:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:19,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:22,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-06 22:36:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:22,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-06 22:36:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:22,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-06 22:36:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 178 proven. 193 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 22:36:23,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:23,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280063040] [2023-11-06 22:36:23,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280063040] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:23,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553102565] [2023-11-06 22:36:23,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:36:23,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:23,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:23,283 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:23,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa9a6c98-d883-47b2-9a4b-8304e0962c13/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:36:23,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-06 22:36:23,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:36:23,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-06 22:36:23,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:24,358 INFO L322 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-06 22:36:24,359 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2023-11-06 22:36:24,570 INFO L322 Elim1Store]: treesize reduction 99, result has 28.3 percent of original size [2023-11-06 22:36:24,571 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 70 [2023-11-06 22:36:35,581 INFO L322 Elim1Store]: treesize reduction 181, result has 59.8 percent of original size [2023-11-06 22:36:35,581 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 110 treesize of output 320 [2023-11-06 22:37:30,746 WARN L293 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 1054 DAG size of output: 1051 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDml.applyElimination) [2023-11-06 22:37:37,937 WARN L293 SmtUtils]: Spent 7.15s on a formula simplification. DAG size of input: 1053 DAG size of output: 1217 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-06 22:38:45,578 WARN L293 SmtUtils]: Spent 11.48s on a formula simplification. DAG size of input: 1589 DAG size of output: 1657 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-06 22:39:00,060 WARN L293 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 762 DAG size of output: 781 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-06 22:39:29,077 WARN L293 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 1582 DAG size of output: 1595 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)