./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/max60-2.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_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/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_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/max60-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/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_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/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 6dbb3c8dbc9ecf6e4f72a22b68126998e2267c3eb50185a59b3a9d03df64099d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:33:38,328 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:33:38,409 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:33:38,415 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:33:38,415 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:33:38,444 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:33:38,445 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:33:38,446 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:33:38,447 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:33:38,452 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:33:38,453 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:33:38,453 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:33:38,454 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:33:38,455 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:33:38,456 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:33:38,456 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:33:38,457 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:33:38,457 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:33:38,457 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:33:38,458 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:33:38,458 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:33:38,459 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:33:38,459 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:33:38,460 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:33:38,460 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:33:38,461 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:33:38,461 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:33:38,461 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:33:38,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:33:38,462 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:33:38,463 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:33:38,463 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:33:38,471 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:33:38,471 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:33:38,472 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:33:38,472 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:33:38,472 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:33:38,472 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:33:38,473 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:33:38,473 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_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6dbb3c8dbc9ecf6e4f72a22b68126998e2267c3eb50185a59b3a9d03df64099d [2023-11-06 22:33:38,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:33:38,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:33:38,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:33:38,814 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:33:38,814 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:33:38,816 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/reducercommutativity/max60-2.i [2023-11-06 22:33:41,926 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:33:42,141 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:33:42,142 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/sv-benchmarks/c/reducercommutativity/max60-2.i [2023-11-06 22:33:42,154 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/data/6a8d97b92/efc1e3ed5b984a18859f7af42d00eba3/FLAGdac81075a [2023-11-06 22:33:42,173 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/data/6a8d97b92/efc1e3ed5b984a18859f7af42d00eba3 [2023-11-06 22:33:42,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:33:42,186 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:33:42,190 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:33:42,190 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:33:42,195 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:33:42,196 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:33:42" (1/1) ... [2023-11-06 22:33:42,197 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1afb0ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:42, skipping insertion in model container [2023-11-06 22:33:42,197 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:33:42" (1/1) ... [2023-11-06 22:33:42,225 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:33:42,446 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_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/sv-benchmarks/c/reducercommutativity/max60-2.i[1290,1303] [2023-11-06 22:33:42,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:33:42,471 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:33:42,511 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_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/sv-benchmarks/c/reducercommutativity/max60-2.i[1290,1303] [2023-11-06 22:33:42,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:33:42,527 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:33:42,528 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:42 WrapperNode [2023-11-06 22:33:42,528 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:33:42,529 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:33:42,530 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:33:42,530 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:33:42,537 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:42" (1/1) ... [2023-11-06 22:33:42,557 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:42" (1/1) ... [2023-11-06 22:33:42,586 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-11-06 22:33:42,587 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:33:42,587 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:33:42,588 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:33:42,588 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:33:42,597 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:42" (1/1) ... [2023-11-06 22:33:42,598 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:42" (1/1) ... [2023-11-06 22:33:42,604 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:42" (1/1) ... [2023-11-06 22:33:42,604 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:42" (1/1) ... [2023-11-06 22:33:42,612 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:42" (1/1) ... [2023-11-06 22:33:42,615 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:42" (1/1) ... [2023-11-06 22:33:42,616 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:42" (1/1) ... [2023-11-06 22:33:42,618 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:42" (1/1) ... [2023-11-06 22:33:42,620 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:33:42,621 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:33:42,621 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:33:42,621 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:33:42,622 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:42" (1/1) ... [2023-11-06 22:33:42,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:33:42,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:42,670 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:33:42,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:33:42,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:33:42,718 INFO L130 BoogieDeclarations]: Found specification of procedure max [2023-11-06 22:33:42,719 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2023-11-06 22:33:42,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:33:42,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:33:42,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:33:42,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:33:42,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:33:42,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:33:42,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:33:42,816 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:33:42,818 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:33:43,040 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:33:43,047 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:33:43,047 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:33:43,049 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:33:43 BoogieIcfgContainer [2023-11-06 22:33:43,050 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:33:43,052 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:33:43,053 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:33:43,056 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:33:43,057 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:33:42" (1/3) ... [2023-11-06 22:33:43,057 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62232888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:33:43, skipping insertion in model container [2023-11-06 22:33:43,058 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:42" (2/3) ... [2023-11-06 22:33:43,058 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62232888 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:33:43, skipping insertion in model container [2023-11-06 22:33:43,059 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:33:43" (3/3) ... [2023-11-06 22:33:43,060 INFO L112 eAbstractionObserver]: Analyzing ICFG max60-2.i [2023-11-06 22:33:43,080 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:33:43,081 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:33:43,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:33:43,134 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;@7102d8dc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:33:43,134 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:33:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 states have internal predecessors, (32), 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 22:33:43,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 22:33:43,146 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:33:43,148 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 22:33:43,148 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:33:43,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:43,153 INFO L85 PathProgramCache]: Analyzing trace with hash 350697856, now seen corresponding path program 1 times [2023-11-06 22:33:43,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:43,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499926908] [2023-11-06 22:33:43,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:43,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:43,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-06 22:33:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:43,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-06 22:33:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:43,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-06 22:33:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:43,405 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 22:33:43,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:43,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499926908] [2023-11-06 22:33:43,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499926908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:43,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:33:43,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:33:43,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515471736] [2023-11-06 22:33:43,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:43,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:33:43,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:43,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:33:43,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:33:43,478 INFO L87 Difference]: Start difference. First operand has 29 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 states have internal predecessors, (32), 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 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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 22:33:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:33:43,508 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2023-11-06 22:33:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:33:43,511 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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 22:33:43,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:33:43,519 INFO L225 Difference]: With dead ends: 54 [2023-11-06 22:33:43,519 INFO L226 Difference]: Without dead ends: 25 [2023-11-06 22:33:43,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:33:43,528 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:33:43,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:33:43,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-06 22:33:43,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-06 22:33:43,570 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 22:33:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-11-06 22:33:43,573 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 29 [2023-11-06 22:33:43,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:33:43,575 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-11-06 22:33:43,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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 22:33:43,575 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-11-06 22:33:43,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 22:33:43,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:33:43,579 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 22:33:43,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:33:43,580 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:33:43,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:43,585 INFO L85 PathProgramCache]: Analyzing trace with hash -731724275, now seen corresponding path program 1 times [2023-11-06 22:33:43,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:43,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118212527] [2023-11-06 22:33:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:43,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:43,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-06 22:33:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:43,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-06 22:33:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:43,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-06 22:33:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 22:33:43,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:43,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118212527] [2023-11-06 22:33:43,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118212527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:43,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162208406] [2023-11-06 22:33:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:43,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:43,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:43,932 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:43,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:33:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:44,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:33:44,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:44,104 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 22:33:44,105 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:33:44,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162208406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:44,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:33:44,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-06 22:33:44,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783641378] [2023-11-06 22:33:44,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:44,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:33:44,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:44,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:33:44,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:33:44,118 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. 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 22:33:44,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:33:44,146 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2023-11-06 22:33:44,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:33:44,146 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 22:33:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:33:44,148 INFO L225 Difference]: With dead ends: 48 [2023-11-06 22:33:44,148 INFO L226 Difference]: Without dead ends: 27 [2023-11-06 22:33:44,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:33:44,151 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 53 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 22:33:44,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:33:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-06 22:33:44,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-11-06 22:33:44,166 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 22:33:44,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-06 22:33:44,168 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 29 [2023-11-06 22:33:44,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:33:44,168 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-06 22:33:44,169 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 22:33:44,169 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-06 22:33:44,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-06 22:33:44,171 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:33:44,171 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 22:33:44,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:44,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:44,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:33:44,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:44,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1391874411, now seen corresponding path program 1 times [2023-11-06 22:33:44,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:44,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957895794] [2023-11-06 22:33:44,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:44,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:44,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 22:33:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:44,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 22:33:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:44,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-06 22:33:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:44,529 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 22:33:44,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:44,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957895794] [2023-11-06 22:33:44,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957895794] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:44,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044982076] [2023-11-06 22:33:44,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:44,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:44,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:44,539 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:44,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:33:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:44,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:33:44,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:44,662 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 22:33:44,665 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:33:44,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044982076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:44,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:33:44,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-06 22:33:44,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889852153] [2023-11-06 22:33:44,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:44,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:33:44,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:44,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:33:44,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:33:44,670 INFO L87 Difference]: Start difference. First operand 26 states and 31 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 22:33:44,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:33:44,690 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2023-11-06 22:33:44,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:33:44,691 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 22:33:44,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:33:44,692 INFO L225 Difference]: With dead ends: 49 [2023-11-06 22:33:44,692 INFO L226 Difference]: Without dead ends: 30 [2023-11-06 22:33:44,693 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 22:33:44,694 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 52 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 22:33:44,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 52 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:33:44,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-06 22:33:44,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2023-11-06 22:33:44,705 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 22:33:44,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-11-06 22:33:44,707 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 31 [2023-11-06 22:33:44,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:33:44,707 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-11-06 22:33:44,707 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 22:33:44,707 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-11-06 22:33:44,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-06 22:33:44,709 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:33:44,709 INFO L195 NwaCegarLoop]: trace histogram [3, 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 22:33:44,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:44,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:44,918 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:33:44,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:44,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1997828742, now seen corresponding path program 1 times [2023-11-06 22:33:44,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:44,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81566801] [2023-11-06 22:33:44,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:44,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:45,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 22:33:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:45,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-06 22:33:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:45,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-11-06 22:33:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:33:45,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:45,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81566801] [2023-11-06 22:33:45,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81566801] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:45,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623661697] [2023-11-06 22:33:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:45,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:45,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:45,089 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:45,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:33:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:45,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:33:45,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:33:45,194 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:33:45,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623661697] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:33:45,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:33:45,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-06 22:33:45,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963478506] [2023-11-06 22:33:45,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:33:45,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:33:45,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:45,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:33:45,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:33:45,197 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 22:33:45,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:33:45,210 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2023-11-06 22:33:45,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:33:45,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 43 [2023-11-06 22:33:45,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:33:45,211 INFO L225 Difference]: With dead ends: 44 [2023-11-06 22:33:45,212 INFO L226 Difference]: Without dead ends: 29 [2023-11-06 22:33:45,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 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 22:33:45,213 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 52 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 22:33:45,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 52 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:33:45,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-06 22:33:45,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-11-06 22:33:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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 22:33:45,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-11-06 22:33:45,219 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 43 [2023-11-06 22:33:45,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:33:45,221 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-11-06 22:33:45,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 22:33:45,221 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-11-06 22:33:45,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-06 22:33:45,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:33:45,223 INFO L195 NwaCegarLoop]: trace histogram [3, 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 22:33:45,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:45,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:45,429 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:33:45,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:45,430 INFO L85 PathProgramCache]: Analyzing trace with hash 271283108, now seen corresponding path program 1 times [2023-11-06 22:33:45,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:45,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481779201] [2023-11-06 22:33:45,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:45,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:45,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-11-06 22:33:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:45,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-06 22:33:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:45,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 22:33:45,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 22:33:45,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:45,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481779201] [2023-11-06 22:33:45,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481779201] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:45,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635289807] [2023-11-06 22:33:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:45,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:45,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:45,622 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:45,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:33:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:45,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:33:45,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-06 22:33:45,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-06 22:33:45,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635289807] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:45,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:33:45,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-11-06 22:33:45,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087768493] [2023-11-06 22:33:45,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:45,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:33:45,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:45,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:33:45,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:33:45,873 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 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 22:33:45,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:33:45,950 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2023-11-06 22:33:45,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:33:45,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 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 45 [2023-11-06 22:33:45,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:33:45,951 INFO L225 Difference]: With dead ends: 64 [2023-11-06 22:33:45,951 INFO L226 Difference]: Without dead ends: 41 [2023-11-06 22:33:45,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 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 22:33:45,953 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:33:45,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 116 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:33:45,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-06 22:33:45,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2023-11-06 22:33:45,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 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 22:33:45,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-11-06 22:33:45,960 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 45 [2023-11-06 22:33:45,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:33:45,960 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-11-06 22:33:45,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 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 22:33:45,961 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-11-06 22:33:45,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-06 22:33:45,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:33:45,963 INFO L195 NwaCegarLoop]: trace histogram [6, 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 22:33:45,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:46,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:46,170 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:33:46,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:46,170 INFO L85 PathProgramCache]: Analyzing trace with hash 344212953, now seen corresponding path program 2 times [2023-11-06 22:33:46,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:46,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890453800] [2023-11-06 22:33:46,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:46,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:46,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-06 22:33:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:46,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-06 22:33:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:46,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-11-06 22:33:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-06 22:33:46,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:46,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890453800] [2023-11-06 22:33:46,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890453800] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:46,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493017370] [2023-11-06 22:33:46,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:33:46,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:46,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:46,304 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:46,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:33:46,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:33:46,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:46,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:33:46,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-06 22:33:46,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-06 22:33:46,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493017370] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:46,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:33:46,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-11-06 22:33:46,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533594890] [2023-11-06 22:33:46,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:46,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:33:46,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:46,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:33:46,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:33:46,573 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 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 22:33:46,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:33:46,648 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2023-11-06 22:33:46,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:33:46,649 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 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 63 [2023-11-06 22:33:46,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:33:46,650 INFO L225 Difference]: With dead ends: 80 [2023-11-06 22:33:46,650 INFO L226 Difference]: Without dead ends: 53 [2023-11-06 22:33:46,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:33:46,652 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:33:46,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 117 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:33:46,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-06 22:33:46,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2023-11-06 22:33:46,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 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 22:33:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2023-11-06 22:33:46,667 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 63 [2023-11-06 22:33:46,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:33:46,668 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2023-11-06 22:33:46,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 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 22:33:46,668 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2023-11-06 22:33:46,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-06 22:33:46,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:33:46,672 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 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 22:33:46,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:46,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:46,877 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:33:46,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:46,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1309932629, now seen corresponding path program 3 times [2023-11-06 22:33:46,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:46,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735025931] [2023-11-06 22:33:46,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:46,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:47,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-06 22:33:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:47,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 22:33:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:47,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-11-06 22:33:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-06 22:33:47,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:47,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735025931] [2023-11-06 22:33:47,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735025931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:47,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037625217] [2023-11-06 22:33:47,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:33:47,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:47,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:47,265 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:47,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:33:47,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:33:47,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:47,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:33:47,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-11-06 22:33:47,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:47,527 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-11-06 22:33:47,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037625217] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:47,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:33:47,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-11-06 22:33:47,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299053133] [2023-11-06 22:33:47,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:47,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:33:47,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:47,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:33:47,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:33:47,531 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 22:33:47,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:33:47,622 INFO L93 Difference]: Finished difference Result 100 states and 123 transitions. [2023-11-06 22:33:47,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:33:47,623 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 77 [2023-11-06 22:33:47,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:33:47,624 INFO L225 Difference]: With dead ends: 100 [2023-11-06 22:33:47,624 INFO L226 Difference]: Without dead ends: 71 [2023-11-06 22:33:47,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:33:47,626 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:33:47,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 186 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:33:47,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-06 22:33:47,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2023-11-06 22:33:47,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 65 states have internal predecessors, (74), 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 22:33:47,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2023-11-06 22:33:47,640 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 77 [2023-11-06 22:33:47,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:33:47,641 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2023-11-06 22:33:47,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 19 states have internal predecessors, (74), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 22:33:47,642 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2023-11-06 22:33:47,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-06 22:33:47,645 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:33:47,645 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 11, 11, 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 22:33:47,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:47,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:47,852 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:33:47,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:47,852 INFO L85 PathProgramCache]: Analyzing trace with hash -906758027, now seen corresponding path program 4 times [2023-11-06 22:33:47,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:47,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635172167] [2023-11-06 22:33:47,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:47,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:48,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-06 22:33:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:48,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2023-11-06 22:33:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:48,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-06 22:33:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-11-06 22:33:48,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:48,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635172167] [2023-11-06 22:33:48,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635172167] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:48,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559273363] [2023-11-06 22:33:48,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:33:48,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:48,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:48,329 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:48,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:33:48,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:33:48,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:48,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:33:48,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-11-06 22:33:48,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-11-06 22:33:48,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559273363] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:48,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:33:48,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-11-06 22:33:48,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639525635] [2023-11-06 22:33:48,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:48,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:33:48,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:48,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:33:48,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:33:48,900 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 27 states have internal predecessors, (78), 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 22:33:48,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:33:48,992 INFO L93 Difference]: Finished difference Result 141 states and 173 transitions. [2023-11-06 22:33:48,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:33:48,993 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 27 states have internal predecessors, (78), 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 127 [2023-11-06 22:33:48,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:33:48,994 INFO L225 Difference]: With dead ends: 141 [2023-11-06 22:33:48,994 INFO L226 Difference]: Without dead ends: 96 [2023-11-06 22:33:48,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:33:48,996 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:33:48,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 103 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:33:48,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-06 22:33:49,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-11-06 22:33:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.098901098901099) internal successors, (100), 91 states have internal predecessors, (100), 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 22:33:49,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2023-11-06 22:33:49,006 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 127 [2023-11-06 22:33:49,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:33:49,007 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2023-11-06 22:33:49,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 27 states have internal predecessors, (78), 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 22:33:49,007 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2023-11-06 22:33:49,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-06 22:33:49,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:33:49,009 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 18, 18, 18, 18, 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 22:33:49,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:49,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:49,216 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:33:49,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:49,216 INFO L85 PathProgramCache]: Analyzing trace with hash -757608005, now seen corresponding path program 5 times [2023-11-06 22:33:49,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:49,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783680139] [2023-11-06 22:33:49,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:49,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:50,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-06 22:33:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:50,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-11-06 22:33:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:50,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-11-06 22:33:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-11-06 22:33:50,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:50,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783680139] [2023-11-06 22:33:50,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783680139] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:50,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391336843] [2023-11-06 22:33:50,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:33:50,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:50,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:50,290 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:50,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:33:53,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-11-06 22:33:53,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:53,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:33:53,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2023-11-06 22:33:53,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 875 trivial. 0 not checked. [2023-11-06 22:33:53,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391336843] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:53,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:33:53,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9, 9] total 41 [2023-11-06 22:33:53,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701091595] [2023-11-06 22:33:53,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:53,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-06 22:33:53,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:53,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-06 22:33:53,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:33:53,695 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 41 states have internal predecessors, (134), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 22:33:53,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:33:53,884 INFO L93 Difference]: Finished difference Result 176 states and 215 transitions. [2023-11-06 22:33:53,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 22:33:53,885 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 41 states have internal predecessors, (134), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 153 [2023-11-06 22:33:53,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:33:53,889 INFO L225 Difference]: With dead ends: 176 [2023-11-06 22:33:53,889 INFO L226 Difference]: Without dead ends: 131 [2023-11-06 22:33:53,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:33:53,894 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 36 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:33:53,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 224 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:33:53,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-06 22:33:53,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2023-11-06 22:33:53,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.136) internal successors, (142), 125 states have internal predecessors, (142), 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 22:33:53,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 148 transitions. [2023-11-06 22:33:53,923 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 148 transitions. Word has length 153 [2023-11-06 22:33:53,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:33:53,925 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 148 transitions. [2023-11-06 22:33:53,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.268292682926829) internal successors, (134), 41 states have internal predecessors, (134), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 22:33:53,925 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 148 transitions. [2023-11-06 22:33:53,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-11-06 22:33:53,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:33:53,936 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 25, 25, 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 22:33:53,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:54,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:54,147 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:33:54,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:54,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1992150769, now seen corresponding path program 6 times [2023-11-06 22:33:54,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:54,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261487595] [2023-11-06 22:33:54,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:54,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:55,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-11-06 22:33:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:55,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2023-11-06 22:33:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:55,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2023-11-06 22:33:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 3589 trivial. 0 not checked. [2023-11-06 22:33:55,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:55,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261487595] [2023-11-06 22:33:55,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261487595] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:55,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980080098] [2023-11-06 22:33:55,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:33:55,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:55,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:55,556 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:55,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:33:55,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-06 22:33:55,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:33:55,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:33:55,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 1634 proven. 4 refuted. 0 times theorem prover too weak. 2576 trivial. 0 not checked. [2023-11-06 22:33:55,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:55,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4210 trivial. 0 not checked. [2023-11-06 22:33:55,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980080098] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:55,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:33:55,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 5, 5] total 34 [2023-11-06 22:33:55,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419485374] [2023-11-06 22:33:55,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:55,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 22:33:55,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:55,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 22:33:55,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:33:55,926 INFO L87 Difference]: Start difference. First operand 130 states and 148 transitions. Second operand has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 states have internal predecessors, (97), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 22:33:56,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:33:56,056 INFO L93 Difference]: Finished difference Result 218 states and 258 transitions. [2023-11-06 22:33:56,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:33:56,057 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 states have internal predecessors, (97), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 251 [2023-11-06 22:33:56,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:33:56,059 INFO L225 Difference]: With dead ends: 218 [2023-11-06 22:33:56,060 INFO L226 Difference]: Without dead ends: 141 [2023-11-06 22:33:56,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:33:56,063 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:33:56,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 162 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:33:56,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-06 22:33:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2023-11-06 22:33:56,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.125925925925926) internal successors, (152), 135 states have internal predecessors, (152), 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 22:33:56,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2023-11-06 22:33:56,086 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 251 [2023-11-06 22:33:56,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:33:56,087 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2023-11-06 22:33:56,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 states have internal predecessors, (97), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 22:33:56,087 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2023-11-06 22:33:56,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2023-11-06 22:33:56,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:33:56,093 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 26, 26, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:56,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:56,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:33:56,304 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:33:56,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:56,304 INFO L85 PathProgramCache]: Analyzing trace with hash 942883655, now seen corresponding path program 7 times [2023-11-06 22:33:56,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:56,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45205011] [2023-11-06 22:33:56,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:56,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:57,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-11-06 22:33:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:57,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-11-06 22:33:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:57,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2023-11-06 22:33:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4297 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-06 22:33:57,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:33:57,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45205011] [2023-11-06 22:33:57,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45205011] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:33:57,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953443416] [2023-11-06 22:33:57,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:33:57,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:33:57,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:33:57,589 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:33:57,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:33:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:33:57,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:33:57,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:33:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4297 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-06 22:33:58,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:33:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4297 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-06 22:33:59,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953443416] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:33:59,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:33:59,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2023-11-06 22:33:59,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115868205] [2023-11-06 22:33:59,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:33:59,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-06 22:33:59,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:33:59,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-06 22:33:59,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2023-11-06 22:33:59,238 INFO L87 Difference]: Start difference. First operand 140 states and 158 transitions. Second operand has 57 states, 57 states have (on average 2.4210526315789473) internal successors, (138), 57 states have internal predecessors, (138), 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 22:33:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:33:59,428 INFO L93 Difference]: Finished difference Result 281 states and 344 transitions. [2023-11-06 22:33:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-06 22:33:59,429 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.4210526315789473) internal successors, (138), 57 states have internal predecessors, (138), 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 261 [2023-11-06 22:33:59,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:33:59,436 INFO L225 Difference]: With dead ends: 281 [2023-11-06 22:33:59,436 INFO L226 Difference]: Without dead ends: 196 [2023-11-06 22:33:59,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2023-11-06 22:33:59,439 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:33:59,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 128 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:33:59,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-06 22:33:59,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2023-11-06 22:33:59,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0890052356020943) internal successors, (208), 191 states have internal predecessors, (208), 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 22:33:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 214 transitions. [2023-11-06 22:33:59,450 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 214 transitions. Word has length 261 [2023-11-06 22:33:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:33:59,451 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 214 transitions. [2023-11-06 22:33:59,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.4210526315789473) internal successors, (138), 57 states have internal predecessors, (138), 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 22:33:59,452 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 214 transitions. [2023-11-06 22:33:59,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2023-11-06 22:33:59,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:33:59,457 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:33:59,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:33:59,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:33:59,664 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:33:59,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:33:59,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1925687665, now seen corresponding path program 8 times [2023-11-06 22:33:59,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:33:59,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880701788] [2023-11-06 22:33:59,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:33:59,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:33:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:03,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2023-11-06 22:34:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:03,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2023-11-06 22:34:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:03,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2023-11-06 22:34:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6537 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-06 22:34:03,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:03,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880701788] [2023-11-06 22:34:03,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880701788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:34:03,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801214577] [2023-11-06 22:34:03,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:34:03,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:03,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:03,230 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:03,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:34:03,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:34:03,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:34:03,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 1156 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-06 22:34:03,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6537 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-06 22:34:03,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:34:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6537 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-11-06 22:34:05,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801214577] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:34:05,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:34:05,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 63 [2023-11-06 22:34:05,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492283783] [2023-11-06 22:34:05,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:34:05,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-06 22:34:05,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:05,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-06 22:34:05,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-11-06 22:34:05,860 INFO L87 Difference]: Start difference. First operand 196 states and 214 transitions. Second operand has 63 states, 63 states have (on average 2.4126984126984126) internal successors, (152), 63 states have internal predecessors, (152), 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 22:34:06,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:34:06,090 INFO L93 Difference]: Finished difference Result 293 states and 334 transitions. [2023-11-06 22:34:06,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-06 22:34:06,091 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.4126984126984126) internal successors, (152), 63 states have internal predecessors, (152), 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 317 [2023-11-06 22:34:06,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:34:06,093 INFO L225 Difference]: With dead ends: 293 [2023-11-06 22:34:06,093 INFO L226 Difference]: Without dead ends: 208 [2023-11-06 22:34:06,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 584 SyntacticMatches, 50 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-11-06 22:34:06,096 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:34:06,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 103 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:34:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-06 22:34:06,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2023-11-06 22:34:06,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.083743842364532) internal successors, (220), 203 states have internal predecessors, (220), 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 22:34:06,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 226 transitions. [2023-11-06 22:34:06,106 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 226 transitions. Word has length 317 [2023-11-06 22:34:06,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:34:06,107 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 226 transitions. [2023-11-06 22:34:06,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.4126984126984126) internal successors, (152), 63 states have internal predecessors, (152), 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 22:34:06,107 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 226 transitions. [2023-11-06 22:34:06,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-11-06 22:34:06,113 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:34:06,113 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:34:06,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:06,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:34:06,330 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:34:06,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:06,330 INFO L85 PathProgramCache]: Analyzing trace with hash 133182019, now seen corresponding path program 9 times [2023-11-06 22:34:06,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:06,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871632626] [2023-11-06 22:34:06,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:06,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:07,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-11-06 22:34:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:07,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2023-11-06 22:34:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:07,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2023-11-06 22:34:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 0 proven. 2010 refuted. 0 times theorem prover too weak. 5211 trivial. 0 not checked. [2023-11-06 22:34:07,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:07,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871632626] [2023-11-06 22:34:07,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871632626] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:34:07,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900000909] [2023-11-06 22:34:07,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:34:07,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:07,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:07,419 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:07,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:34:07,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-06 22:34:07,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:34:07,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:34:07,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 1634 proven. 36 refuted. 0 times theorem prover too weak. 5551 trivial. 0 not checked. [2023-11-06 22:34:07,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:34:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7185 trivial. 0 not checked. [2023-11-06 22:34:08,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900000909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:34:08,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:34:08,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 31 [2023-11-06 22:34:08,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746293676] [2023-11-06 22:34:08,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:34:08,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 22:34:08,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:08,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 22:34:08,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:34:08,115 INFO L87 Difference]: Start difference. First operand 208 states and 226 transitions. Second operand has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 31 states have internal predecessors, (118), 2 states have call successors, (5), 2 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 22:34:08,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:34:08,251 INFO L93 Difference]: Finished difference Result 314 states and 362 transitions. [2023-11-06 22:34:08,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:34:08,251 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 31 states have internal predecessors, (118), 2 states have call successors, (5), 2 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 329 [2023-11-06 22:34:08,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:34:08,253 INFO L225 Difference]: With dead ends: 314 [2023-11-06 22:34:08,253 INFO L226 Difference]: Without dead ends: 231 [2023-11-06 22:34:08,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 650 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:34:08,255 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 33 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:34:08,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 265 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:34:08,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-11-06 22:34:08,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 228. [2023-11-06 22:34:08,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.0807174887892377) internal successors, (241), 223 states have internal predecessors, (241), 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 22:34:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 247 transitions. [2023-11-06 22:34:08,266 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 247 transitions. Word has length 329 [2023-11-06 22:34:08,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:34:08,267 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 247 transitions. [2023-11-06 22:34:08,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.806451612903226) internal successors, (118), 31 states have internal predecessors, (118), 2 states have call successors, (5), 2 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 22:34:08,267 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 247 transitions. [2023-11-06 22:34:08,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2023-11-06 22:34:08,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:34:08,274 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 45, 45, 45, 45, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:34:08,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:08,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:34:08,488 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:34:08,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:08,489 INFO L85 PathProgramCache]: Analyzing trace with hash 939195982, now seen corresponding path program 10 times [2023-11-06 22:34:08,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:08,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858258164] [2023-11-06 22:34:08,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:08,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:09,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-11-06 22:34:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:09,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2023-11-06 22:34:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:09,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2023-11-06 22:34:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:09,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7906 backedges. 0 proven. 2303 refuted. 0 times theorem prover too weak. 5603 trivial. 0 not checked. [2023-11-06 22:34:09,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:09,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858258164] [2023-11-06 22:34:09,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858258164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:34:09,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270282512] [2023-11-06 22:34:09,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:34:09,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:09,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:09,537 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:09,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:34:09,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:34:09,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:34:09,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 1302 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:34:09,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7906 backedges. 1864 proven. 435 refuted. 0 times theorem prover too weak. 5607 trivial. 0 not checked. [2023-11-06 22:34:10,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:34:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7906 backedges. 0 proven. 2303 refuted. 0 times theorem prover too weak. 5603 trivial. 0 not checked. [2023-11-06 22:34:10,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270282512] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:34:10,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:34:10,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2023-11-06 22:34:10,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124698629] [2023-11-06 22:34:10,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:34:10,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 22:34:10,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:10,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 22:34:10,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:34:10,598 INFO L87 Difference]: Start difference. First operand 228 states and 247 transitions. Second operand has 34 states, 34 states have (on average 4.5588235294117645) internal successors, (155), 34 states have internal predecessors, (155), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:34:10,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:34:10,761 INFO L93 Difference]: Finished difference Result 399 states and 472 transitions. [2023-11-06 22:34:10,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:34:10,762 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.5588235294117645) internal successors, (155), 34 states have internal predecessors, (155), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 357 [2023-11-06 22:34:10,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:34:10,764 INFO L225 Difference]: With dead ends: 399 [2023-11-06 22:34:10,764 INFO L226 Difference]: Without dead ends: 296 [2023-11-06 22:34:10,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 704 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:34:10,766 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 128 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:34:10,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 135 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:34:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-11-06 22:34:10,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2023-11-06 22:34:10,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 1.120274914089347) internal successors, (326), 291 states have internal predecessors, (326), 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 22:34:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 332 transitions. [2023-11-06 22:34:10,778 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 332 transitions. Word has length 357 [2023-11-06 22:34:10,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:34:10,779 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 332 transitions. [2023-11-06 22:34:10,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.5588235294117645) internal successors, (155), 34 states have internal predecessors, (155), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:34:10,779 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 332 transitions. [2023-11-06 22:34:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2023-11-06 22:34:10,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:34:10,784 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 96, 96, 60, 60, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:34:10,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:10,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:34:10,992 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:34:10,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:10,993 INFO L85 PathProgramCache]: Analyzing trace with hash 964869273, now seen corresponding path program 11 times [2023-11-06 22:34:10,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:10,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912605898] [2023-11-06 22:34:10,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:10,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:12,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2023-11-06 22:34:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:13,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2023-11-06 22:34:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:13,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 424 [2023-11-06 22:34:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:13,813 INFO L134 CoverageAnalysis]: Checked inductivity of 22339 backedges. 0 proven. 10344 refuted. 0 times theorem prover too weak. 11995 trivial. 0 not checked. [2023-11-06 22:34:13,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:13,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912605898] [2023-11-06 22:34:13,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912605898] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:34:13,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753989096] [2023-11-06 22:34:13,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:34:13,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:13,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:13,817 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:13,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ea4b4dc-88d7-4e63-ab76-0c6f8789cb03/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process